Carpenter J P, Holland G A, Baum R A, Riley C A
Department of Surgery, University of Pennsylvania School of Medicine, Philadelphia 19104.
J Surg Res. 1994 Sep;57(3):373-9. doi: 10.1006/jsre.1994.1157.
While conventional magnetic resonance imaging has been described for the evaluation of the venous system, we have recently developed the technique of magnetic resonance venography (MRV), which generates three-dimensional projection venograms. Our purpose was to determine if MRV reliably images the venous system by comparison with findings at surgical exploration. Thirteen of fourteen consecutive patients undergoing bypass surgery (26 limbs) were studied by 2D time-of-flight MRV preoperatively from the inguinal ligament to the ankle bilaterally. The average examination time was 50 min. The size and quality of each saphenous vein were recorded at the saphenofemoral junction, mid-thigh, knee, mid-calf, and malleolus. Intraoperatively the quality and size of each vein were measured in situ and when distended by saline. Twelve veins were of good quality. MRV predicted this in every case. One vein, found to be recanalized, had an abnormally thick wall noted on MRV. MRV measurements of average vein size were intermediate between that of the in situ and distended vein and correlated most closely with the distended vein (R = 0.74, P < 0.001). The superficial and deep femoral veins and lesser saphenous veins were routinely visualized by MRV; thus a complete map of all available vein was obtained by a single study. It is concluded that MRV is an accurate method of venous imaging as confirmed by findings at operative exploration. This new technique holds promise as a noninvasive method for evaluation of the venous system and warrants further investigation.
虽然传统的磁共振成像已被用于评估静脉系统，但我们最近开发了磁共振静脉造影（MRV）技术，该技术可生成三维投影静脉造影图。我们的目的是通过与手术探查结果进行比较，确定MRV能否可靠地对静脉系统进行成像。对连续接受搭桥手术的14例患者中的13例（26条肢体）在术前进行了双侧腹股沟韧带至踝关节的二维时间飞跃MRV研究。平均检查时间为50分钟。记录每条大隐静脉在隐股交界处、大腿中部、膝关节、小腿中部和内踝处的大小和质量。术中在原位测量每条静脉的质量和大小，并在注入盐水使其扩张后进行测量。12条静脉质量良好。MRV在每种情况下都能做出正确预测。发现一条再通的静脉在MRV上显示出异常增厚的管壁。MRV测量的平均静脉大小介于原位静脉和扩张静脉之间，且与扩张静脉的相关性最为密切（R = 0.74，P < 0.001）。MRV可常规显示股浅静脉、股深静脉和小隐静脉；因此，通过一次研究即可获得所有可用静脉的完整图谱。结论是，如手术探查结果所证实，MRV是一种准确的静脉成像方法。这项新技术有望成为评估静脉系统的非侵入性方法，值得进一步研究。
