Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee 37232-2675, USA.
J Magn Reson Imaging. 2010 Mar;31(3):698-702. doi: 10.1002/jmri.22082.
Presented are two cases of minute amounts of vacuum phenomena within the central portion of the lateral compartments of two knee joints, mimicking torn discoid lateral menisci. In each case, only the gradient echo images were able to correctly characterize the minute quantities of intraarticular gas by demonstrating "blooming" magnetic susceptibility artifact. The signal characteristics of the intraarticular gas were identical to those of fibrocartilage on all of the remaining routine, fast spin echo, "sports protocol" magnetic resonance imaging sequences.
现介绍两例膝关节外侧间室中央部分出现微量真空现象的病例，这些现象类似于撕裂的盘状外侧半月板。在每种情况下，只有梯度回波图像能够通过显示“blooming”（晕状）磁敏感性伪影正确地描述关节内微量气体，从而正确地对其进行特征描述。关节内气体的信号特征与所有其余常规、快速自旋回波、“运动协议”磁共振成像序列中的纤维软骨相同。
