It is the purpose of this work to investigate whether it is feasible to develop Finite Element (FE) models that take into account the geometric differences between the lumbar vertebrae of patients. It is also the purpose of this work to determine whether or not such patient specific differences affect the results of the FE analysis in such a significant way that they should be considered in fut...

Abstract Numerous studies are based on the use of animal models; however, in bipedal and tetrapedal organisms there significant differences biomechanics spinal column, which can significantly impair quality applicability results obtained. The aim this study is to obtain basic data morphometric parameters guinea pig lumbar vertebrae, analysis will indicate location biggest mechanical load. verte...

The Anatomy of the Lumbar Vertebral Column T he lumbar portion of the vertebral column has an ideal structure aiming at maintaining stability and mobility. This region has a solid structure designed to carry the weights of the head, the neck, the trunk and the extremities. The pains associated with this region are very common complaints affecting 80% of the population at least one time during t...

A detailed lumbar spine FE component model (including vertebrae, inter-vertebral discs, all ligaments and facet joints of T12-L5) was built per the Global Human Body Model Consortium (GHBMC) CAD data. The lumbar model was correlated with the Post-Mortem Human Subject (PMHS) lumbar spine tests under flexion, compression and anterior shear loading modes in the physiological ranges (Belwadi, 2008)...

This paper presents a systematic approach to lumbar spine vertebrae tracking in fluoroscopic images using complex-valued wavelets. The proposed algorithm is designed specifically based on a set of performance criteria associated with the detection and tracking of feature points in lumbar spine vertebrae from fluoroscopic images. The algorithm handles contrast and illumination non-homogeneities ...

simple bone cysts are usual, benign, fluid-filled, cystic lesions that often occur in the metaphysis of the long bones and are rarely detected in vertebrae. a case of a simple bone cyst in the body of the fifth lumbar vertebra in a 28-year-old woman with complaint of intermittent low back pain is described. according to the radiologic findings, the lesion was detected as a simple bone cyst, and...

OBJECTIVE To compare the level of agreement of quantitative morphometry of the vertebrae on lateral views of the spine using conventional X-ray and using a dual X-ray absorptiometry device (DXA) in determining the degree of wedging of vertebrae in patients with ankylosing spondylitis (AS). METHODS Thirty patients with AS underwent DXA to acquire single-energy morphometric X-ray absorptiometry...

The robotic lumbar spine (RLS) is a 15 degree-of-freedom, fully cable-actuated robotic lumbar spine which can mimic in vivo human lumbar spine movements to provide better hands-on training for medical students. The design incorporates five active lumbar vertebrae and the sacrum, with dimensions of an average adult human spine. It is actuated by 20 cables connected to electric motors. Every vert...

Radical hepatectomy was carried out on a patient with hepatocellular carcinoma (HCC) located in segment VIII of the liver. The patient was a 56-year-old man who showed positive for hepatitis C antibody and negative for hepatitis B surface antigen. Six months after hepatectomy, a lumbar plane X-ray and computed tomography examination revealed bone metastases in the lumbar vertebrae. The patient ...

Solitary osteochondromas, which are the most common benign bone tumors of long bones, are rarely found in the vertebral column. A 16-year-old female patient presented with a hard palpable mass at lower lumbar region like a congenital deformity. Plain radiography illustrated a well-defined solid mass arising from the posterior elements of the L3 and ruled out any congenital anomalies. A computed...