RESEARCH PAPERS

medical electronics research papers




Current, future trends in medical electronics
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Key trends driving the medical electronics market are aging populations, rising healthcare costs around the globe and the need for access to medical diagnosis and treatment in remote and emerging regions and in our own homes. The different world economies will 

Implantable Medical Electronics Assembly Quality and Reliability Considerations
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ABSTRACT Implanted electronic devices face an unusually benign environment in many respects. However, mechanisms still exist by which an occasional device may degrade and fail in service. Because of the extreme financial and ethical liabilities often involved these 

Body EMF Absorption: A Design Issue for Implantable Medical Electronics
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ABSTRACT Recently the human body implantable medical devices have been experiencing a rapid development. Medical implants are an integration of sensing technologies, nano/micro technologies, and wireless communication technologies and are developed as innovative 

Contribution of HEP electronics techniques to the medical imaging field
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ABSTRACT The purpose of this study was to show how ad-vanced concepts of compact, lossless and Time Of Flight capable electronics similar to those foreseen for the LHC and ILC experiments could be fairly and easily transferred to the medical imaging field through 

Formation of Medical Physics Students in the Field of Electronics Medical Equipment
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Several years of expertise in teaching Medical Physics allowed to define the optimum program, taking under consideration both students predispositions and expectations, as well as the desired educational profile. Detailed presentation of medical equipment leaves 

Bio-Medical Division and Electronics Engineering Department
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This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author.

Medical Electronics Conference
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BBC New ,IET THE following summary of reports received and decisions reached by the Council of The Institution at their meeting on the 19th May 1960 is issued on the authority of the President in a form approved by the Council. It will be under- stood that this report does not purport to be a complete 

MEDICAL ELECTRONICS
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Be that as it may, this volume from the University of Texas gives us something to think about, even though its main theme is directed mainly towards nuclear mechanisms that drive the malignant cell headlong in its un-governed invasion of the tissues and says little about 

Parylene Nanospheres, NanotubesNanocoatings for Medical and ElectronicsApplications
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ABSTRACT This paper describes Parylene hollow nanomesospheres and nanotubes with their potential applications. Various types of spheres and particles with different functionality were also explored. The nanospheres are derived from the concept of hollow 

GRID COMPUTING IN HELP OF MEDICAL ELECTRONICS
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These qualities are making the Grid environments in very powerful and suitable tool for realizing complexity tasks in the medical electronics. Grid environments are eliminating the limitation a specialized operations to be executed in big distances. In that way is solving 

Enabling breakthroughs in medical electronics
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Page 1. Enabling breakthroughs in medical electronics Kent Novak Vice president, Medical  High Reliability  creates discontinuities • Diverse and broad opportunity • TI strategy for leadership in medical electronics – Broad catalog portfolio – Application-specific products 

DEPARTMENT OF ELECTRONICS EINDHOVEN UNIVERSITY OF TECHNOL06Y 6roupMedical Electronics
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SOME FUNDAMENTALS OF MEDICAL ELECTRONICS I: SIMPLE DC CIRCUITS
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In most branches of medical research, increasing larly rubbed ebonite rod Z. A glass rod Y rubbed use is being made of the techniques of electronic engineering. The main reason for this lies in the necessity to acquire a large amount of information from an experiment in a 

MEDICAL ELECTRONICS
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216 NOTICES OF RECENT PUBLICATIONS consideration of the results of agar gel electrophoresis in a comprehensive list of over five hundred cases of diverse neurological disorders. These results are considered both according to the clinical diagnosis and also 

Electronics und Medical Signal Processing
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In our research activities, we have seen a very good start to two new projects in the areas of biomedical signal processing and audiovisual speech recognition, where our results have led to a number of publications and a couple of ongoing, promising activities for new 

Study and Evaluating Scheme Multi Point Entry and Orgainised System ( W ) ElectronicsEngineering (Medical Electronics) Effective W W Sr. Subject
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AC 2011-726: TEACHING MEDICAL ELECTRONICS TO BIOMEDICAL ENGINEERING STUDENTS: A PROBLEM ORIENTED APPROACH
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ABSTRACT A significant number of graduates from Biomedical Engineering (BME) enter industry or enroll in graduate programs and are confronted with the challenge of developing electronic medical device prototypes. These prototypes requires the integration of very 

Micropower Low-Pass Filter for Medical Electronics Devices Application
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ABSTRACT This work contains a brief study of a new structure of a low-pass filter of Nth order, operating in low frequencies. The low-pass filter is designed with CMOS technology and biased to work in weak inversion. The dimension of the lay-out of the circuit and very low 

The Determination of a Technical Core Curriculum for a Two Year Technical Program in Bio-Medical Electronics.
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ABSTRACT The major concerns of this study were to determine the extent of need for bio- medical electronic technicians and to determine what would constitute a functional technical core curriculum for training to fill that need. Following a review of medical and electronic 

Miniaturized multi-channels SiPM read-out electronics for medical imaging application
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The precise localization and complete surgical excision of tumors is one of the most important procedures in the cancer treatment. The aim of the surgery is to process a total resection of the tumors mass while sparing surrounding normal tissues. However, the 

The Syllabus Enhancement for Medical Imaging in Biomedical Electronics Engineering At University Malaysia Perlis
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ABSTRACT Biomedical engineering has only recently emerged as its own discipline, compared to many other engineering fields; such an evolution is common as a new field transitions from being an interdisciplinary specialization among already-established fields, 

A VANISHING ACT: USING SILK AND SILICON BASED TRANSIENT ELECTRONICS TO DIAGNOSE, MONITOR, AND TREAT MEDICAL AILMENTS
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ABSTRACT Transient Electronics is a technology at the forefront of biomedical engineering. By taking a typical electric circuit and recreating it as an ultrathin model, researchers have created tiny, biocompatible electronic devices that dissolve into their surroundings when 

and CB Collins Center for Quantum Electronics,  
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Recent experiments1, 2, 3, 4 have shown that cross sections for (-Y,-y') reactions that populate nuclear isomers can be orders of magnitude larger than previously expected at excitation energies above about 2 MeV. These results were obtained by pumping nuclear 

HIGH TEMPERATURE FLUORINATED PARYLENE FOR MEDICAL AND ELECTRONICSAPPLICATIONS
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The role of polymers in medical  electronics, particularly in miniaturized devices and components continues to grow rapidly due to increasing demand for more reliable products and advances in other technical fields. As the number of medical  ; electronic devices, 

Brain tumor detection



An improved implementation of brain tumor detection using segmentation based on hierarchical self organizing map
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ABSTRACT Image segmentation denotes a process of partitioning an image into distinct regions. A large variety of different segmentation approaches for images have been developed. Among them, the clustering methods have been extensively investigated and

Neural network based brain tumor detection using MR images
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This is the review of work for Bain tumor detection using MR images. The present paper suggested Neural Network based brain tumor detection. Both hardware and software approach is proposed in this paper. The interdependency of two approaches certainly

Automated Brain Tumor Detection and Identification Using Image Processing and Probabilistic Neural Network Techniques
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ABSTRACT In this paper, modified image segmentation techniques were applied on MRI scan images in order to detect brain tumors. Also in this paper, a modified Probabilistic Neural Network (PNN) model that is based on learning vector quantization (LVQ) with image and

Brain Tumor Detection Using Modified Histogram Thresholding-Quadrant Approach?
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ABSTRACT In medical image processing brain tumor detection is one of the challenging task, since brain images are complicated and tumors can be analyzed only by expert physicians. So In this paper brain tumor is detected at various levels. First the pre-processing is done

CAD System for Automatic Detection of Brain Tumor through Magnetic Resonance Image-A Review
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Abstract In this Review paper, it is intended to summarize and compare the methods of automatic detection of brain tumor through Magnetic Resonance Image (MRI) used in different stages of Computer Aided Detection System (CAD). In particular, Image

Computer aided detection of brain tumor in magnetic resonance images
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ABSTRACT Brain tumor is an abnormal mass of tissue with uncoordinated growth inside the skull which may invade and damage nerves and other healthy tissues. Non-homogeneities of the brain tissues result in inaccurate detection of tumor boundaries with the existing

Performance Analysis of Clustering Algorithms in Brain Tumor Detection of MR Images
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ABSTRACT The brain is the anterior most part of the central nervous system. Along with the Spinal cord, it forms the Central Nervous System (CNS). Brain tumor is an abnormal growth caused by cells reproducing themselves in an uncontrolled manner. Magnetic Resonance

Automatic detection of brain tumor from MRI scans using maxima transform
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ABSTRACT In this paper we present a technique to detect the tumor from magnetic resonance imaging brain scans. Usually tumors occupy the locations of normal tissues and their intensity characteristics differ from the surrounding normal tissues. Using this

Detection of Brain Tumor by Mining fMRI Images
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ABSTRACT Brain tumor patients are increasing day-to-day. This paper proposes a novel approach to extract metabolite values from graph. Metabolites like NAA, Creatine, Choline and Cr2 are used to detect the brain tumor. Cho/NAA ratio plays most important role in

Malignant Brain Tumor Detection
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ABSTRACT Brain tumor, a mass of tissue that grows out of control is one of the major causes for the increase in mortality among children and adults. Segmenting the regions of brain is the major challenge in tumor detection. A large number of effective segmentation

A novel wavelet based image fusion for brain tumor detection
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Abstract Accurate detection of size and location of brain tumor plays a vital role in the diagnosis of tumor. In this paper, we propose an efficient wavelet based algorithm for tumor detection which utilizes the complementary and redundant information from the Computed

5-Aminolevulinic acid induced protoporphyrin IX fluorescence for detection of brain tumorcells in vivo
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The use of optical methods for brain tumor diagnostics was evaluated according to the differences of fluorescence spectra. The in vivo biological tissue autofluorescence and the induction of endogenous porphyrins after iv injection of 5-aminolevulinic acid (ALA) were

Lactate production in human brain tumor; detection by 13C MRS at 3 T
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Highly malignant tumor cells release lactate, therefore, lactate has been postulated as biomarker for malignancy (1). Indeed, lactate is often detected by 1H MRS in brain tumor tissue (2), but its level is very variable and does not appear to be related with the grade of

Supervised machine learning for brain tumor detection in structural MRI
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Brain tumor detection from MRI data is tedious for physicians and challenging for computers. Detection of small tumors, which often form early primary neoplastic or metastatic disease, is particularly difficult and has only recently been a focus

Brain Tumor Detection Using Marker Based Watershed Segmentation from Digital MR Images
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ABSTRACT This paper presents a method for detection of brain tumor from Magnetic Resonance Image. Pre-processing the image makes it ready for applying the watershed segmentation. Pre-processing includes image resizing, conversion to gray. Gradient

Brain Tumor Detection Using Neural Network
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ABSTRACT The segmentation of brain tumors in magnetic resonance images (MRI) is a challenging and difficult task because of the variety of their possible shapes, locations, image intensities. In this paper, it is intended to summarize and compare the methods of

Brain Tumor Detection and Localization in Magnetic Resonance Imaging
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Abstract A tumor also known as neoplasm is a growth in the abnormal tissue which can be differentiated from the surrounding tissue by its structure. A tumor may lead to cancer, which is a major leading cause of death and responsible for around 13% of all deaths

An Artificial Neural Network Approach for Brain Tumor Detection Based on Characteristics of GLCM Texture Features
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ABSTRACT This paper outlines extensive lab work for artificial neural network based Brain tumor detection using MR images with texture features method. Gray Level Co-occurrence Matrix (GLCM) characteristics features are used with the patient's MR image for training of

A hybrid approach for automatic tumor detection of brain MRI using support vector machine and genetic algorithm
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Global Journal of Science,

Content Based Image Retrieval Approach to Tumor Detection in Human Brain Using Magnetic Resonance Image
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ABSTRACT with the advancement in multimedia and imaging technology, Content Based Image Retrieval (CBIR) is becoming very important and emerging field. CBIR is the part of image processing that extracts features of image to index images with minimal human

BRAIN FINGERPRINTING



Brain fingerprinting: A critical analysis
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Recent efforts by various investigators have been directed at using brain waves in detection of deception. One investigator, Lawrence A. Farwell, left academia about a decade ago and founded his company, Farwell Brain Fingerprinting..

Brain Fingerprinting: Comprehensive Corrections to Rosenfeld in Scientific Review of Mental Health Practice1
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An abbreviated version of this article was published in the Scientific Review of Mental Health published in SRMHP. This more comprehensive version provides additional details, and

Brain fingerprinting
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Brain finger printing is based on finding that the brain generates a unique brain wave pattern when a person encounters a familiar stimulus. Use of functional magnetic resonance imaging in lie detection derives from studies suggesting that persons asked to lie show

The Brain Fingerprinting Technology
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ABSTRACT Brain Fingerprinting is a new computer-based technology to identify the perpetrator of a crime accurately and scientifically by measuring brain-wave responses to crime-relevant words or pictures presented on a computer screen. Brain Fingerprinting has proven 100%

BRAIN FINGERPRINTING
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ABSTRACT Brain fingerprinting is based on finding that the brain generates a unique brain wave pattern when a person encounters a familiar stimulus Use of functional magnetic resonance imaging in lie detection derives from studies suggesting that persons asked to

An Efficeint: Brain Fingerprinting
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ABSTRACT Every science involves skill, judgment, or" art" on the part of its practitioners and the science of Brain Fingerprinting testing is no exception. Every forensic science provides scientific data and scientific conclusions for the use of non-scientist judges and juries, who

Brain FingerPrinting
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ABSTRACT Every forensic science provides scientific data scientific conclusions for the use of non-scientist panel of judges juries, who evaluate these on a consistent legal basis regarding facts. The reason of this document is to describe the boundaries of the science

New level of Security in ATM System Using Brain Fingerprinting
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Abstract Security plays a vital role in all fields and in various applications. The existing computer security systems used at various places like banking, passport, credit cards, smart cards, PIN (Personal Identification Number), access control and network security are using

The Brain Fingerprinting Technology
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ABSTRACT Brain Fingerprinting is a new computer-based technology to identify the perpetrator of a crime accurately and scientifically by measuring brain-wave responses to crime-relevant words or pictures presented on a computer screen. Brain Fingerprinting

THE BRAIN FINGERPRINTING TECHNOLOGY
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Abstract Brain Fingerprinting is a new computer-based technology to identify the perpetrator of a crime accurately and scientifically by measuring brain-wave responses to crime-relevant words or pictures presented on a computer screen. Brain Fingerprinting

The Brain Fingerprinting Technology
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ABSTRACT Brain Fingerprinting is a new computer-based technology to identify the perpetrator of a crime accurately and scientifically by measuring brain-wave responses to crime-relevant words or pictures presented on a computer screen. Brain Fingerprinting

A Breakthrough in Criminal Investigations Using Farwell Brain Fingerprinting
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ABSTRACT Brain Fingerprinting is a new computer-based technology to identify the perpetrator of a crime accurately and scientifically by measuring brain-wave responses to crime-relevant words or pictures presented on a computer screen [1-4]. Brain Fingerprinting has proven

Uncrackable Password Authentication Using Brain Fingerprinting
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ABSTRACT Brain Fingerprinting is a technique used to find the unique brain-wave pattern generated by brain when a person encounters a familiar stimulus. It is based on fact that brain is central to all human acts. Brain is always there, planning, executing and recording

Brain Fingerprinting
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ABSTRACT Throughout the history of the criminal justice system, numerous technological innovations have signaled landmark changes in how authorities conduct investigations. From fingerprinting to DNA testing, these one-time technological marvels turned police

Combined Quantitative Approach for Brain Tumor Fingerprinting
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Magnetic Resonance Spectroscopic (MRS) studies of brain biomarkers have been proven to provide statistically significant biomarkers for tumor grade differentiation and improved predictors of survival for cancer patients . Ex, vivo HRMAS high4resolution MR spectra

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Lumen Segmentation and Motion Estimation in B-Mode and Contrast-Enhanced Ultrasound Images of the Carotid Artery in Patients With Atherosclerotic Plaque

Lumen Segmentation and Motion Estimation in B-Mode and Contrast-Enhanced Ultrasound Images of the Carotid Artery in Patients With Atherosclerotic Plaque
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Abstract:In standard B-mode ultrasound (BMUS), segmentation of the lumen of atherosclerotic carotid arteries and studying the lumen geometry over time are difficult owing to irregular lumen shapes, noise, artifacts, and echolucent plaques. Contrast enhanced

HIP PROSTHESIS



Nuclear arthrography: combined scintigraphic and radiographic procedure for diagnosis of total hip prosthesis loosening
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Conclusion: Nuclear arthrography is a sensitivetechnique for de tection of loosening of prostheses, offering added value over radiographic arthrography and bone scanning alone, especially for eval uation of the femoral component. Radiographie arthrography remains

Aseptic loosening of a total hip prosthesis secondary to tophaceous gout. A case report.
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In July 1985, an eighty-six-year-old sedentary white woman was referred for revision of a total hip replacement on the right side. Five years previously. at another hospital. bilateral total hip replacement had been done for severe arthritis (Fig. I). After bilateral replacement

Girdlestone's pseudarthrosis after removal of a total hip prosthesis; a retrospective study of 40 patients
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In case of irreversible failed total hip replacement, a Girdlestone operation is sometimes the obvious solution: excision of cement and prosthesis without attempting a new hip replacement. Reasons for not implanting a new prosthesis are severe loss of bonestock,

UHMWPE-alumina ceramic composite, an improved prosthesis material for an artificial cemented hip joint
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A finite element analysis w as undertaken on a simplified three-dimensional model (Axisymmentric model) of a cemented hip prosthesis. Both stem and bone are assumed to be rigidly connected by a layer of acrylic bone cement (PMMA) and the layer taken are of

Does metal-on-metal total hip prosthesis have influence on cancer A long-term follow-up study
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Zimmer Metasul Metal-on-Metal Tribological Solution Title DOES METAL-ON-METAL TOTAL HIP PROSTHESIS HAVE INFLUENCE ON CANCER A LONG-TERM FOLLOW-UP STUDY Publication In: World Tribology Forum in Arthroplasty. Rieker C, et al (eds). Bern, Hans

Dislocation of a total hip prosthesis by a false aneurysm
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Discussion. This method has proved to be simple and reliable. It has reduced operating time by ensuring that the correct size of nail is sterilised ready fqius. e. It is particularly valuable in segmental fractures where it is not advisable to over-ream and in distal fractures where it

The transfixion hip prosthesis
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INTRODUCTION The hopeful enthusiasm that greeted the original report of the Judet brothers has given way to widespread discouragement. Accounting for this have been a wide variety of surgical complications, prosthetic failures due to wear and tear and Abstract A method of automatic hip prosthesis design is presented. The shape of the tail of the prosthesis is optimized with respect to the anatomical surface of the medullary canal of the femur. Four conventional hip roetgengrams are performed; each of them is processed

Role of technetium-99m phosphonate bone and indium-111 leukocyte scanning for detecting the infected hip prosthesis
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In our study,[@ Tc] MDP bone scans were classified into the following distributions of radioactivity around the pros thesis: normal uptake, focally abnormal uptake, diffusely ab normal uptake, and focal superimposed on diff usely abnormal uptake (the captions to Figure Charnley's figures for his own total hip prosthesis illustrate this point. There was only one stem' fracture up to 1971 (1), there were six by 1973 (2), and seventeen by 1975 (4). In this latter paper Charnley reported that in his experience of some 7,000 patients the fracture rate is

Complete replacement arthroplasty of the hip by the Ring prosthesis
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The requirements of an arthroplasty of the hip are that it should produce a painless, freely mobile and stable joint. It is apparent that this can be achieved in osteoarthritis only by replacing both the pelvic and femoral components. The success of the intramedullary

Tribological behaviour of a Total Hip Prosthesis during normal walking active cycle
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Total Hip Arthroplasty represents a modern surgical technique that allow for replacement of the natural hip joint by an artificial one. The lifetime of a hip prosthesis is highly connected with the contact mechanism and with friction and wearing processes that occur at the

Clinical relevance of acetabular erosion in young patients with a bipolar hip prosthesis
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In this study 18 bipolar hip prostheses were used in the treatment of a proximal femoral sarcoma in a young patient population (mean age: 39.6 years). Their quality of life was evaluated by TESS and MSTS scores, after a mean follow-up of 81.8 months (range 8-171

The use of the Wagner revision prosthesis in complex (post) traumatic conditions of the hip
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Complex posttraumatic conditions in the proximal femur can be difficult to treat because of severe bone loss. A possible solution to this problem is the Wagner prosthesis. The results of 23 replacements in 22 patients are described. They were satisfactory in most cases for

Photoelastic simulation of a cementless and of a hydroxyapatite coated total hip prosthesis
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Remodelling of bone, regularly observed after the implantation of a hydroxyapatite coated Furlong hip prosthesis, stimulated the authors to analyse the stress distribution and relative magnitude in photoelastic models, of 1. the upper half of an intact femur; 2. of a femur

Modelling of an under-hip prosthesis with ankle and knee trajectory control by using human gait analysis
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Abstract: In this paper, depending on bipedal human walking analysis, knee and ankle joint control of special under-hip prosthesis is investigated. After the designing of the prosthesis and its parts by using SolidWorks, strength analyses under various pedestal loads are

Use of the Austin Moore prosthesis for advanced osteoarthritis of the hip
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USE OF THE AUSTIN MOORE PROSTHESIS IN OSTEOARTHRITIS OF THE HIP 237 This report concerns the results at short-term follow-up of a series of cases of advanced 2, MAY 1966 USE OF THE AUSTIN MOORE PROSTHESIS IN OSTEOARTHRITIS OF THE HIP 239

Resection-reconstruction of the Hip: Arthroplasty with an Acrylic Prosthesis
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It is the usual fate of a new operation, or indeed of any new method of treatment, either to be rejected without trial or to be used unscientifically with all the short-sighted enthusiasm dictated by fashion and nurtured by inexperience. Ultimately a mounting total of failures or Late aseptic loosening is the most frequent long-term complication of cemented total hip arthroplasty. Theoretical and experimental studies have shown that stiff cemented stems significantly alter the stress distribution of the femur, including reduced proximal stresses

Procedure for Cutting the Stem of a Vitallium Hip Prosthesis
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PW) CEDUItE FOR cu'r'rixu TIlE STEM OF A VITALL I IJM H IP iROSTHEs1s rn ini: nsi in. KF: ssIF: n, MD, AND IIEI (IIERT M. S4IMOXSON, MD, NE\ VAISK, NF:\ v JEIISEY 'l'hse stut. hsoms netenitlv\ vene lStCe (l with the prol) lens(If shsort. ensinig the) 1Otltn (. ling stem (If

Wear fixation and revision of total hip prosthesis'
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PCA Porous Coated Anatomic PhD philosophiae doctor PE polyethylene PMMA polymethyl- metacrylate RCT (s) randomised controlled trial (s) RR relative risk (risk ratio) RSA radiostereometric analysis SCP Scandinavian Custom Prostheses THA (s) total hip

A modified technique for closed reduction of modular hip prosthesis dislocation: Bassi's method
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ABSTRACT Dislocation is one of the common complications after hip arthroplasty. The problem is further compounded in modular hip prosthesis as there is potential risk of disengagement of the components. A different technique for closed reduction of the

Finite element analysis of composite hip prosthesis
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Page 1. Finite Element Analysis of Composite HipProsthesis M. Sivasankar, D.Chakraborty, SKDwivedy Department of Mechanical Engineering Indian Institute of Technology, Guwahati Page 2. 2 Page 26. 26 HipProsthesis Parts State Variables Design Variables Femur There is increasing interest in the use of ceramic on ceramic bearings for hip prosthesis world wide, due to recognition of their extremely low wear and biocompatibility of the wear debris. Recent developments in ceramic matrix composites and the introduction Biolox

Wear and friction characteristics of the tripolat all ceramic hip prosthesis
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There is increasing interest in the use of ceramic on ceramic bearings for hip replacement world wide, due to recognition of their extremely low wear and biocompatibility of the wear debris [1]. Recent developments in ceramic matrix composites and the introduction of

Furlong Hydroxyapatite Coated Hip Prosthesis Versus the Charnley Cemented Hip Prosthesis-A Prospective Randomised Study
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Debate continues to take place over the relative merits of cemented and uncemented total hip prostheses. The introduction in the mid 1980's of a calcium hydroxapatite ceramic coating has introduced a further dimension to the argument1. Hydroxyapatite ceramic

Histology of the bone-implant interface 45 years after bilateral implantation of a Judet acrylichip prosthesis: a case report
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The Judet acrylic femoral head hemiprosthesis was first implanted in 1946. We performed bilateral revision in one patient 45 years after implantation of a Judet prosthesis. Histological analysis of femoral neck remnants and joint capsule did not show aggressive osteoclastic Dislocation remains one of the most common complications after total hip arthroplasty. The ceramic on ceramic bearing surface hasn't yet solved this problem. Itsprevalence ranges from 0.6%to 7%according to different publications series. [1-2-3-4-5-6-7-8-9). Thesewide variations Concerns about polyethylene wear debris induced osteolysis has led to renewed interest in alternative bearing couples such as ceramic on ceramic and metal on metal. Conventionally, bearing couples in artificial joints, as well in engineering systems, are comprised of

Cementless Press-Fit and Fibrous or Bony Ingrowth" Asian Total Hip Prosthesis" Design Using Computed Axial Tomography and Computer Aided Design and
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The purpose of this study was to design intramedullary femoral stems that will optimally distribute the stresses to the bone. It was postulated that an¡ deal distribution of stresses would occur if the femoral stem had the same shape as the canal. However, because of

Hip Joint Prosthesis with Rolling Bodies, Part I–The Balls Arrangement Analysis
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The total hip joint prosthesis with rolling bodies substitutes the sliding movement, which is a characteristic for classic prosthesis, with rolling movement between the femural head and the acetabular cup/1/. All the prosthesis elements are manufactured from biocompatible

The design of a novel hip resurfacing prosthesis
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Abstract Total hip replacement (THR) is one of the most successful and most frequently performed operations. For most implants the published rate of revision at 10 years is less than 10%. However the revision rates are higher for younger and more active patients

Construction and fitting of the Canadian-type hip-disarticulation prosthesis
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True hip disarticulation connotes removal of the femur at the acetabulum. But loosely within the hip-disarticulation category a residual length of femur, too short to control a prosthesis effectively, may be left. A much more drastic operation, the hemipelvectomy, removes all of

Early results with the thrust plate prosthesis in young patients with osteoarthritis of the hip
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¦ Sanjeev Sharma, Senior House Officer, Orthopaedics. ¦ Gopalkrishna Verma, Senior House Officer, Orthopae- dics. ¦ Kingsley Paul Draviraj, Senior House Officer, Orthopae- dics. ¦ Manjit Bhamra, Consultant Orthopaedic Surgeon. Department of Orthopaedic Surgery,

Early results of total hip replacement with the Metasul metal-on-metal cementlessprosthesis
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Abstract Background: The need for better durability and longevity in total hip arthroplasty in high demand patients is a constant challenge. For this purpose, a metal-on-metal prosthesis with improved tribology was developed. Our early results using this implant are presented.

An Orthosis for a Patient with a Failed Total Hip-Prosthesis
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Recently, a 65-year-old Caucasian female with diabetes was seen who had a chronic, recurring problem with her left hip and thigh for the past four years. Initially, she suffered an injury to the left hip that developed into degenerative osteo-arthritis of the hip joint. A total

Revision of a 30-year-old ring total hip prosthesis
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Dear Sir, A 69-year-old male presented with progressive pain and decreasing range of movement in the right hip. As part of treatment for post-traumatic arthritis 30 years previously, he had a right total hip arthroplasty with ring prosthesis. He had been diagnosed with a

Biomechanics of the hip disarticulation prosthesis
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More than twenty years ago, McLaurin (1954) published his first report on the Canadian hip disarticulation prosthesis. His work was aimed at improving the conventional design of the saucer-type and tilting table prostheses. A measure of his success can be seen in that the

Proinflammatory cytokine levels in serum and synovial fluid of patients with aseptic loosening of hip prosthesis
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Results: There was no significant differences in the serum TNF-a level among the three groups, while the OL (+) group had an increased serum IL-6 level when compared with both the OL (-) group and the control group. Serum IL-8 levels were also increased when

Using FEM analysis in order to chose the optimal hip prosthesis
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Abstract. Many studies have shown that femoral and pelvic geometry has a great influence on the distribution and amount of tensions and displacements related to it. This study was conducted on a three-dimensional model (3D) derived from computer tomography images

Asymptomatic fracture of a femoral prosthesis after total hip replacement: six-year follow-up
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Fracture of the femoral component of a total hip replacement is a well known, if relatively uncommon, complication of this procedure. Since it was first reported in 1968's, numerous articles have described this complication, with the prevalence ranging from 0.23 to 11 per

Rapid progression of a severe femoral bone loss in a stable revision hip prosthesis: causes and management
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AbstrAct We report a case of a severe bone loss of the proximal fe mur with a rapid progression, in a 72-year-old male patient with a stable total revision hip prosthesis. The pa tient had a persistent mechanical thigh pain. The blood laboratory values were normal.

Designing an experimental stand to test the friction torque on a hip prosthesis femoral head
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Abstract. In order to carry out implants' fatigue tests under physiologic loading conditions, it is required to know the forces acting on the hip joint. A wear testing machine which is able to test the actual prostheses is called a hip simulator. Over the years various researches on

Tribological influence the clearance in the hip prosthesis
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S ummary The longevity of total hip arthroplasties is significantly reduced by the wear of joint surfaces. Wear is the result of the product between contact pressure and sliding distance that is generated by the patient's daily activity. While the sliding distance can be calculated

unilateral spinal anesthesia and L1 paravertebral block combined with psoas compartment and sciatic nerve block in patients to undergo partial hip prosthesis
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Abstract.–OBJECTIVES: Just as hip pros-thesis, most of the patients undergoing orthopedic lower extremity surgery (OLES) belong to the advanced age group. Sciatic nerve block combined with psoas compartment block is used as a technique alternative to central

Why Use a Custom-made Hip Prosthesis A 10-Year Experience.
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The direct analysis of femoral anatomy is provided by cadaver studies. For the clinician two methods are commonly available: X-rays and CT scan. The comparison of cadaver measurement to radiographic data led

Comparative analysis of the geometrical design parameters in cemented hip prosthesis
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COMPUTATIONAL SIMULATION OF BONE-PERSONALIZED HIP PROSTHESIS ASSEMBLY
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The total hip arthroplasty is the most common procedure for hip reconstruction, but even if it has a great success rate it also has some limitations regarding compromises that must be made, which can lead to post operative complications and could affect patient's life quality

Total knee and hip prosthesis: variables associated with costs
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Conclusions: There is considerable potential for reducing costs of the hospital stay for these patients because 44% of the observed variability was not determined by the clinical conditions of the patients but rather by the behavior of the hospitals. Keywords: hip

request Brain tumor segmentation and its area calculation in brain MR images using K-mean clustering and Fuzzy C-mean algorithm

Brain tumor segmentation and its area calculation in brain MR images using K-mean clustering and Fuzzy C-mean algorithm

Brain tumor segmentation and its area calculation in brain MR images using K-mean clustering and Fuzzy C-mean algorithm
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Abstract-This paper deals with the implementation of Simple Algorithm for detection of range and shape of tumor in brain MR images. Tumor is an uncontrolled growth of tissues in any part of the body. Tumors are of different types and they have different Characteristics and


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