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Osteoporosis is a systemic skeletal disease with an increased risk of fracture due to reduced bone strength. As the population ages, it becomes a global public health problem. Dual-energy X-ray absorption method is mainly used to diagnose osteoporosis by measuring bone mineral density, but the accuracy of this method in predicting the risk of osteoporosis-related fracture is low. In recent years, many studies have found that in addition to bone mineral density, bone structure change is also one of the important factors that lead to the reduction of bone strength, and the bone structure can be quantitatively analyzed by a variety of imaging method . We introduce micro-CT, HR-PQCT, UTE :MRI, HR-:MRI, MSCT, and other existing imaging method for quantitative analysis of bone structure, analyze the advantages and disadvantages of these method, and summarize the research progress of these imaging method in the diagnosis of osteoporosis and the prediction of related fragility fractures. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Clinical Neurosurgery / Linchuang Shenjingwaike Zazhi is the property of Editorial Board of Journal of Clinical Neurosurgery and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Diagnostic Imaging & Interventional Radiology is the property of Editorial Office of Diagnostic Imaging & Interventional Radiology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Osteoporosis is the property of Chinese Journal of Osteoporosis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To compare the performance of 3 T MR arthrography and conventional MRI for diagnosing acetabular labrum tear. Methods Conventional MRI and MR arthrography of the hips of 53 patients were retrospectively analyzed by two radiologists independently. The MR findings were compared to hip arthroscopy. Results Of 53 patients, acetabular labral tear was arthroscopically confirmed in 31. The sensitivity, specificity, accuracy, positive predictive value (PPV) and negative predictive value (NPV) of MR arthrography for assessing the acetabular labral tear were 90.32％, 77.27％, 84.91％, 84.85％, and 85.00％ for one radiologist, 93.55％, 77.27％, 86.79％, 85.29％, and 89.47％ for the second radiologist with good inter-observer consistency (k=0.797). The sensitivity,specificity,accuracy, PPV and NPV of conventional MRI for evaluating the acetabular labral tear were 54.84％, 72.73％, 62.26％, 73.91％,and 53.33％ for the first radiologist, 61.29％,77.27％, 67.92％, 79.17％, and 58.62％ for the second radiologist with good inter-observer consistency (k=0.733). The sensitivity, accuracy and NPV of MR arthrography for diagnosing acetabular labral tear were significantly higher than those of conventional MRI (P＜0.05). Conclusion 3 T MR arthrography of the hip is reliable and superior to conventional MRI for diagnosing acetabular labral tear. [ABSTRACT FROM AUTHOR]

Objective To evaluate the value of high-resolution hip MRI for diagnosing acetabular labrum tears. Methods 3.0 T hip MRI of 122 patients was independently reviewed by two radiologists and compared with the results of arthroscopy. Results Acetabular labrum tear was arthroscopically diagnosed in 87 of the 122 patients. The sensitivity and specificity of MRI were 60.92% and 74.29% (radiologist A), 64.37% and 74.29% (radiologist B), respectively, with good consistency between the two observers (Kappa value=0.645). Conclusion High-resolution hip MRI has moderate sensitivity and high positive predictive value for diagnosing acetabular labrum tears. Paralabral cysts are the specific MRI manifestations. [ABSTRACT FROM AUTHOR]

Objective To compare the image quality of FSE T2WI PROPELLER and 3D-FIESTA imaging of the internal auditory canal. Methods FSE T2WI PROPELLER and 3D-FIESTA examinations of the internal auditory canals were performed on 132 patients using a 3T MR scanner. The image quality was qualitatively evaluated by two radiologists and compared using the Wilcoxon signed rank test. Results The images quality of FSE T2WI PROPELLER was significantly better than that of the reconstructed images of 3D-FIESTA (P<0.05). Conclusion The FSE T2WI PROPELLER technique is superior to reconstructed 3D-FIESTA for assessing the internal auditory canals. [ABSTRACT FROM AUTHOR]