Search

Your search keyword '"Lumbar spine MRI"' showing total 3 results
Start Over Descriptor "Lumbar spine MRI" Journal skeletal radiology
3 results on '"Lumbar spine MRI"'

1. Limited magnetic resonance imaging of the lumbar spine has high sensitivity for detection of acute fractures, infection, and malignancy.

Author

Wang, Benjamin, Fintelmann, Florian, Kamath, Ravi, Kattapuram, Susan, Rosenthal, Daniel, Fintelmann, Florian J, Kamath, Ravi S, Kattapuram, Susan V, and Rosenthal, Daniel I

Subjects
*LUMBAR vertebrae, *SACRUM injuries, *PSOAS abscess, *LUMBAR pain, *MAGNETIC resonance imaging, *BACK, *BONE fractures, *INFECTION, *SACRUM, *SPINAL injuries, *TUMORS, *RETROSPECTIVE studies
Abstract

Objective: The objective of this study is to determine how a limited protocol MR examination compares to a full conventional MR examination for the detection of non-degenerative pathology such as acute fracture, infection, and malignancy.Materials and Methods: A sample of 349 non-contrast MR exams was selected retrospectively containing a 3:1:1:1 distribution of negative/degenerative change only, acute fracture, infection, and malignancy. This resulted in an even distribution of pathology and non-pathology. A limited protocol MR exam was simulated by extracting T1-weighted sagittal and T2-weighted fat-saturated (or STIR) sagittal sequences from each exam and submitting them for blinded review by two experienced musculoskeletal radiologists. The exams were evaluated for the presence or absence of non-degenerative pathology. Interpretation of the limited exam was compared to the original report of the full examination. If either reader disagreed with the original report, the case was submitted for an unblinded adjudication process with the participation of a third musculoskeletal radiologist to establish a consensus diagnosis.Results: There were five false negatives for a sensitivity of 96.9 % for the limited protocol MR exam. Infection in the psoas, paraspinal muscles, and sacroiliac joint, as well as acute fractures in transverse processes and sacrum were missed by one or more readers. No cases of malignancy were missed. Overall diagnostic accuracy was 96.0 % (335/349).Conclusions: MR imaging of the lumbar spine limited to sagittal T1-weighted and sagittal T2 fat-saturated (or STIR) sequences has high sensitivity for the detection of acute fracture, infection, or malignancy compared to a conventional MR examination. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

2. Psoas muscle index is related to hip fracture in osteoporosis: a cross-sectional MRI study

Author

Bilinc Dogruoz Karatekin and Zeynep Nilufer Tekin

Subjects
musculoskeletal diseases, Male, Osteoporosis, Lumbar, Absorptiometry, Photon, Bone Density, medicine, Humans, Radiology, Nuclear Medicine and imaging, Psoas Muscles, Retrospective Studies, Bone mineral, Hip fracture, Lumbar Vertebrae, medicine.diagnostic_test, business.industry, Hip Fractures, Lumbar spine MRI, Magnetic resonance imaging, medicine.disease, Magnetic Resonance Imaging, Lumbar spine, Female, Nuclear medicine, business, Osteoporotic Fractures
Abstract

OBJECTIVE The aim of this study was to investigate the properties of psoas muscle in osteoporotic patients in lumbar magnetic resonance imaging (MRI) scan and their relationship with hip fracture. MATERIALS AND METHODS One hundred seventy-seven patients with osteoporosis (63.69 ± 9.677, 105 female) who had received lumbar spine MRI and dual-energy X-ray absorptiometry (DXA) examinations were retrospectively included. Thickness (PMT), cross-sectional areas (CSA), and index (PMI) values were measured for psoas muscle at L3 level and psoas muscle characteristics were compared between hip fracture and control groups. RESULTS PMT, CSA, and PMI values were statistically significantly different between hip fracture and control groups (respectively p

Published
2021

3. Nerve root sleeve diameters at normal segments and at segments with proximate disc disease: MRI evaluation

Author

Michael R. Terk and Tetyana A. Gorbachova

Subjects
Adult, Male, medicine.medical_specialty, Adolescent, Nerve root, Humans, Medicine, Radiology, Nuclear Medicine and imaging, Hernia, Aged, Aged, 80 and over, Analysis of Variance, Lumbar Vertebrae, business.industry, Lumbar spine MRI, Anatomy, Middle Aged, Spinal cord, medicine.disease, Magnetic Resonance Imaging, Intervertebral disk, medicine.anatomical_structure, Spinal nerve, Orthopedic surgery, Female, Abnormality, Spinal Nerve Roots, business, Intervertebral Disc Displacement
Abstract

Objective. To compare MR morphologic parameters of spinal nerve roots and their range of variability in normal and abnormal spinal segments. Design and patients. Ninety-six consecutive lumbar spine MRI examinations were segregated into three groups: group 1 was composed of 30 patients with disc bulge, protrusion or extrusion at the L5-S1 segment measuring 3 mm or more; group 2 consisted of 31 patients with no disc pathology; and group 3 was composed of 35 patients with no disc abnormality at the L5-S1 level but with coexisting spine pathology at other segments. Measurements of 192 S1 nerve root sleeves were performed at three consecutive levels on T1-weighted images. Differences between right and left nerve root sleeve diameters (delta value) at three slice levels were calculated in each group. Data were analyzed by ANOVA. Results. No significant differences between the mean values of traversing S1 nerve root sleeve diameter on three corresponding consecutive slices were found among groups (P=0.733, P=0.824, P=0.365 respectively), nor were significant differences in delta values between groups found (P=0.639, P=0.113, P=0.722). Conclusions. S1 nerve root sleeve diameter and the differences between right and left in the abnormal group were not significantly different from normal and therefore can not be used as an objective criterion of nerve root pathology.

Published
2002
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results