Petasnick J P, Turner D A, Charters J R, Gitelis S, Zacharias C E
Radiology. 1986 Jul;160(1):125-33. doi: 10.1148/radiology.160.1.3715023.
Magnetic resonance (MR) images and computed tomographic (CT) scans of histologically characterized soft-tissue masses of the locomotor system in 35 patients were compared for image contrast, demonstration of bone destruction, and display of extent and anatomic relationships of the masses. Subjective criteria for predicting malignancy were tested. T1 measurements were made in a few cases. Intensities of masses relative to those of fat and muscle in spin-echo T1-weighted and highly T2-weighted images were evaluated for correlation with tissue type. Subjective value of using coronal and sagittal images was assessed. Because of its superior inherent image contrast and its ability to provide direct sagittal and coronal images, MR was better than CT in demonstrating size and extent of most tumors and their relationships to vascular and nonvascular structures. However, bone destruction was more difficult to see with MR. Except for fatty tumors, MR was not helpful in identifying tissue type. Subjective criteria were of limited value in distinguishing benign from malignant lesions. Moreover, there is currently no credible evidence that T1 or T2 measurements are helpful in this regard. Study results suggest that MR is superior to CT in evaluating soft-tissue masses of the locomotor system. If an MR examination is performed, CT may not be necessary in certain cases unless bone involvement is suspected.
对35例经组织学确诊的运动系统软组织肿块患者的磁共振（MR）图像和计算机断层扫描（CT）进行了比较，以观察图像对比度、骨质破坏的显示情况以及肿块的范围和解剖关系的展示。对预测恶性肿瘤的主观标准进行了测试。少数病例进行了T1测量。评估了自旋回波T1加权和高T2加权图像中肿块相对于脂肪和肌肉的信号强度，以探讨与组织类型的相关性。评估了使用冠状位和矢状位图像的主观价值。由于其固有的优越图像对比度以及提供直接矢状位和冠状位图像的能力，在显示大多数肿瘤的大小和范围及其与血管和非血管结构的关系方面，MR优于CT。然而，MR更难发现骨质破坏。除脂肪性肿瘤外，MR对识别组织类型并无帮助。主观标准在区分良性和恶性病变方面价值有限。此外，目前没有可靠证据表明T1或T2测量在这方面有帮助。研究结果表明，在评估运动系统软组织肿块方面，MR优于CT。如果进行了MR检查，在某些情况下，除非怀疑有骨质受累，否则可能不需要进行CT检查。
