Download or read book Validation and Application of a Three dimensional System for Spinal Kinematics written by Ali Abed Charri and published by . This book was released on 1990 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Validation and Use of a Three Dimensional Goniometry System to Investigate Lumbar Motion in Healthy Subjects and Low Back Pain Patients Undergoing Manual Mobilisation written by Guy Van Herp and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Validation of Novel Methods to Track Three Dimensional Spine Kinematics During Dynamic Trunk Movements Using a Time of Flight RGB D Camera written by Wantuir Carlos Ramos Junior and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Low back pain (LBP) is a common and costly musculoskeletal disorder. Clinicians and researchers frequently assess dysfunction in LBP by observing patient's movement quality during pre-determined tasks using technically challenging and expensive motion capture devices. However, the cost and expertise needed to use these devices are direct barriers to their widespread adoption in clinical settings where direct benefits could be realized by LBP patients. RGB-D cameras are a potential inexpensive and less time-intensive motion capture alternative, which have been validated for analyses of gait, postural control, ergonomics, and human anatomy. However, as manufactured, RGB-D cameras are not ready for specific kinematic analyses, such as lumbar spine motion, as the native artificial intelligence (AI) models do not adequately detect the number and location of trunk joints to accurately track three-dimensional kinematics. In this thesis a proof of concept framework to adapt RGB-D cameras to accurately measure lumbar spine kinematics is presented, which is separated into two research studies: 1) validation of an RGB-D depth-based algorithm against an optoelectronic motion capture system of reference for measuring spine motion, and 2) the development of a markerless method of measuring lumbar spine kinematics. In study one, 12 healthy young adults (6M, 6F) performed 35 cycles of repetitive flexion-extension with infrared reflective marker clusters placed over their T10-T12 spinous processes and sacrum, while motion capture data were recorded simultaneously by one RGB-D camera and a 10-camera optoelectronic motion capture system. Lumbar spine joint angle range of motion (ROM) were extracted and compared between systems. Root mean squared error (RMSE) values were very low across all movement axes (RMSE ≤ 2.05° ± 0.97°), and intraclass correlations (ICCs) were considered excellent across all axes (ICC2,1 ≥ 0.849), while Bland-Altman plots revealed that, on average, the RGB-D camera slightly underestimated flexion-extension angles (≈ -1.88o) and slightly overestimated lateral bending and axial twisting angles (≈ 0.58o). In study two, a single RGB-D camera was used to capture infrared, depth, and colour image data of 15 participants performing two batteries of 10 cycles of repetitive trunk flexion-extension under two conditions: marked (i.e. hand drawn markers on key anatomical locations on the back) and unmarked. The collected data were used to create a custom four module convolutional neural network (CNN; SpineNet) to segment the human back into upper back, lower back, and spine regions and to subsequently extract lumbar spine kinematics. SpineNet was trained and tested on ten marked participants in a train:test ratio of 80:20. Images of five additional participants without markers were used to evaluate SpineNet's generalizability. Quantitative image segmentation analysis on marked data had good similarity and accuracy between their prediction and ground truth across all individual modules (mPAFG ≥ 0.8855; mJBKG ≥ 0.8391; mJFG ≥ 0.7884; fwJBKG ≥ 0.9672; fwJFG ≥ 0.8087) when the background class was ignored. Qualitative image segmentation analysis on unmarked data showed that Colourized and Surface Normal modules presented a more uniform and robust class morphology throughout frames than infrared (IR) and Fusion modules. All modules extracted kinematics similarly and were compared with their ground truth labels, showing low error levels across all movement axes (RMSE ≤ 3.66o), and good agreement on the flexion-extension and axial twist axes (ICC2,1 > 0.907; CI 95% [0.640, 0.990]); however kinematic extraction in the lateral bend axis was poor (-0.212
Download or read book 3 dimensional Model of the Kinematics of the Human Spine written by Tsang Yeou Chen and published by . This book was released on 1985 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Three Dimensional Finite Element Model to Study the Biomechanical and Kinematic Characteristics of the Human Lumbar Spine in Flexion written by Dhruv Jitesh Mehta and published by . This book was released on 2007 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the research was to develop a three-dimensional finite element model to study the biomechanical and kinematic characteristics of the human lumbar spine in flexion. An analytical model of the lumbar spine capable of taking into consideration the actual geometry, non-linear material properties and realistic loading would be of benefit in studying normal biomechanics, as well as in-vivo behavior in injured and surgically altered spines. Fundamental to this approach is an accurate model of the spine. This was achieved by modeling the lumbar segments L2-L4 from Computed Tomography (CT) data and analyzing them under loading conditions that best approximated the human lumbar segments in flexion. An in-vitro study was performed for validation of the finite element model. Human lumbar cadaveric spinal segments (L2-L4) were loaded based on test conditions similar to those defined in the finite element analysis. The results of the cadaver biomechanical study and finite element analysis were compared. The results suggest that the model is a valid approach to assessing the range of motion of the L3 segment under flexion. Rotation under lateral bending moments was additionally investigated to provide a thorough validation of the model.
Download or read book Refinement and Validation of a Three dimensional Head spine Model Final Report written by Ted Belytschko and published by . This book was released on 1978 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Refinement and Validation of a Three Dimensional Head Spine Model written by and published by . This book was released on 1978 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three dimensional discrete model of human spine, torso and head has been refined and validated by comparison with available experimental results. The model consists of a system of rigid bodies, representing the head, vertebrae, and ribs, interconnected by deformable elements which represent the intervertebral discs, ligaments, and other connective tissues. Four models of varying orders of complexity have been developed, ranging from a complex model to a very simplified model with 32 degrees of freedom. The simplified model is able to closely reproduce many of the response characteristics of the more complex models in G sub z loadings, and, because of its simplicity and short running time, may be well suited for design use. Experimental results for human subjects suitable for validation of models are primarily available in the form of impedance curves for vertical harmonic excitation so techniques were developed which efficiently obtain impedance curves for the model. Comparisons of the impedance curves show good agreement, both in the magnitudes and locations of peaks. Furthermore, it was shown that the primary peaks in the impedance curve in the 5 to 7 Hz range result from a combination of buttock-seat resonance, the flexural response of the spine and visceral resonance. Analogous head-spine models were developed for the chimpanzee, baboon, and rhesus monkey. The objective of this development was to provide a scaling methodology for dynamic response and injury data among these non-human primates and man. Impedance curves are presented for these models and show significant differences in character from that of the human spine models.
Download or read book Three dimensional Analysis of Human Movement written by Paul Allard and published by Champaign, IL : Human Kinetics. This book was released on 1995 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers, graduate students, and practitioners alike will benefit from this state-of-the-art reference. It's the first book to explain in a single volume the essential components of three-dimensional analysis of human movement. Readers will gain a fundamental understanding of methods and technology used to capture, reconstruct, and process 3-D data; concepts and techniques of mechanical and neuromuscular modeling, including robotics; and the application of 3-D analysis. The editors have brought together contributions from international experts to create a technical manual that demonstrates the possibilities and potential pitfalls of 3-D analysis of human movement. More than 140 tables, diagrams, and photos throughout the book illustrate essential content.
Download or read book A Novel Robotic Simulator for Assessing the Three dimensional Kinematics of the Entire Thoracolumbar Spine Application for Evaluating the Adjacent Level Effects of Spinal Interventions written by Erin E. Campbell and published by . This book was released on 2008 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Three dimensional Kinematics of the Human Lumbar and Cervical Spine Using the 3SPACE Isotrak System written by Patricia Anne Hartley Russell and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Congress on Medical Physics and Biomedical Engineering May 26 31 2012 Beijing China written by Mian Long and published by Springer Science & Business Media. This book was released on 2013-02-11 with total page 2385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The congress’s unique structure represents the two dimensions of technology and medicine: 13 themes on science and medical technologies intersect with five challenging main topics of medicine to create a maximum of synergy and integration of aspects on research, development and application. Each of the congress themes was chaired by two leading experts. The themes address specific topics of medicine and technology that provide multiple and excellent opportunities for exchanges.
Download or read book Three Dimensional Kinematics of Human Spine written by Marutl Ram Gudavalll and published by . This book was released on 1989 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cervical Myelopathy written by Peter Passias and published by JP Medical Ltd. This book was released on 2015-02-28 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cervical Myelopathy is a comprehensive guide to the treatment of compression of the spinal cord in the neck, as a result of spinal stenosis. This book is edited by Pete Passias, Adult and Paediatric Scoliosis and Spinal Deformity Specialist at the New York University Medical College, ensuring authoritative content throughout. The book is comprised of six sections, divided into 24 chapters. The introductory section covers the anatomy of the skull base and cervical spine, and diagnosis of cervical myelopathy. Further sections cover outcomes of conservative management and surgery, diagnostic aetiologies, surgical management, cervical deformities, and the setting of spine tumours. Surgical procedures covered in the book include laminectomy, laminoplasty and total disc replacement. Cervical Myelopathy contains 300 full colour images, further enhancing this guide for all orthopaedic surgeons. Key Points Guide to treatment of compressed spinal cord in the neck Edited by Pete Passias, Adult and Paediatric Scoliosis and Spinal Deformity Specialist at the New York University Medical College 300 full colour images
Download or read book Measurement of Three dimensional Spine Motion written by Marie Shea Coffee and published by . This book was released on 1986 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Three dimensional Curvature and Kinematic Analysis of the Human Spine written by Cheng Cao and published by . This book was released on 1993 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Three dimensional Kinematic Analysis of Spine Motion written by Bryan Preston Conrad and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Motion is an important function of the human spine and accurate measurement of that motion is critical to assessing spinal health and the effect of treatments. There is a great need for tools that allow accurate 3D intervertebral spine motion to be measured in vivo. The purpose of this study is to develop a method for registering a 2D radiograph with a 3D CT scan for the purpose of measuring 3D motion in the spine. This goal was achieved in three phases. The first phase of this project evaluated the accuracy of a fluoroscopic object recognition technique to measure the 3D position and orientation of a cervical disc arthroplasty implant. Although the experimental uncertainties of the proposed technique have been extensively analyzed with respect to the measurement of knee implant motions, the size, geometry, and type of motion of spine implants requires that these uncertainties be determined specifically for spine components. These uncertainties were determined using a cadaver model. The second phase of this project developed and evaluated the static accuracy and capture range of a novel 2D/3D image registration methodology using existing gold standard data. Digitally reconstructed radiographs were used in the registration algorithm to take advantage of the internal contours and density variation of the bony anatomy. In the third phase of this project, the uncertainties of measuring dynamic 3D kinematics of cervical vertebrae were determined. The tools developed in this project will allow clinicians and researchers to accurately quantify the performance of the normal spine as well as new implants designed to restore motion to the spine. This methodology also has applications for other joints, such as the shoulder, ankle, knee and hip.
Download or read book Nonlinear Dynamics and Complex Patterns in the Human Musculoskeletal System and Movement written by Yih-Kuen Jan and published by Frontiers Media SA. This book was released on 2024-01-03 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
