Roubidoux M A, Dunnick N R, Sostman H D, Leder R A
Department of Radiology, Duke University Medical Center, Durham, NC 27710.
Radiology. 1992 Jan;182(1):269-72. doi: 10.1148/radiology.182.1.1727294.
Magnetic resonance (MR) imaging has been proposed as a noninvasive alternative to vena cavography and computed tomography for the detection of venous extension of renal adenocarcinoma. However, spin-echo MR images may be compromised by the presence of flow-related artifacts, extrinsic compression, and respiratory or cardiac motion artifacts. Use of gradient-recalled echo (GRE) sequences is advantageous for imaging of vascular structures. To investigate the detection of vascular extension of tumor with the GRE technique, findings in the preoperative GRE MR images of 26 patients with renal adenocarcinoma were compared with findings at surgery and pathologic examination. Vena cava thrombus was correctly identified in 13 of 13 patients (100%). Renal vein thrombus was correctly identified in 23 of 26 patients (88%), and right atrial thrombus was correctly identified in four of five patients (80%). Use of GRE sequences allows accurate assessment of vascular structures that is sufficient for surgical planning.
磁共振（MR）成像已被提议作为一种非侵入性方法，用于替代腔静脉造影和计算机断层扫描，以检测肾腺癌的静脉扩展情况。然而，自旋回波MR图像可能会受到血流相关伪影、外部压迫以及呼吸或心脏运动伪影的影响。使用梯度回波（GRE）序列对血管结构成像具有优势。为了研究采用GRE技术检测肿瘤血管扩展的情况，将26例肾腺癌患者术前GRE MR图像的检查结果与手术及病理检查结果进行了比较。13例患者中有13例（100%）腔静脉血栓被正确识别。26例患者中有23例（88%）肾静脉血栓被正确识别，5例患者中有4例（80%）右心房血栓被正确识别。使用GRE序列能够对血管结构进行准确评估，这对于手术规划而言已足够。
