Comparison of radionuclide (RN), computed tomography (CT) and magnetic resonance (MR) imaging of a vascular necrosis (AVN) of the hip using receiver operator characteristic (ROC) curves
The diagnostic accuracy of RN, CT, and MR imaging for AVN was determined retrospectively using ROC curves. The abnormal images were drawn from 35 patients who had proven AVN. The MR images were made using an experimental GE resistive magnet operating at 0.12 Tesla corresponding to a proton resonant of 5.1 MHz. Most of the CT images were made using a GE 9800 CT Scanner. RN images were obtained using 99m-Tc MDP. Planar as well as pinhole images of both hips were acquired on each case. Three test sets, one for each modality was assembled. Each of the imaging modalities had a sensitivity of 85%, and a specificity of 85% at the optimal point on the ROC curve. These data demonstrates that MR imaging is not significantly different from other modalities for discrimination between AVN and normal hips. The test set did not include patients with disease other than AVN. The authors are planning to perform a blinded prospective study for more definitive results.
- Research Organization:
- Univ. of Pennsylvania School of Medicine, Philadelphia, PA
- OSTI ID:
- 5972061
- Report Number(s):
- CONF-850611-; TRN: 87-039536
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 26:5; Conference: 32. annual meeting of the Society of Nuclear Medicine, Houston, TX, USA, 2 Jun 1985
- Country of Publication:
- United States
- Language:
- English
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