Leiner T, Ho K Y, Thelissen G R, Nelemans P J, de Haan M W, van Engelshoven J M
Ned Tijdschr Geneeskd. 1999 May 22;143(21):1087-93.
Contrast-enhanced magnetic resonance angiography (MRA) involves intravenous injection of a contrast medium that increases the signal intensity of blood by shortening its T1 value. With contrast-enhanced MRA the acquisition time is short (less than 40 s for the abdominal aorta and the iliac vessels) and the images obtained can be interpreted accurately. The contrast medium currently in use virtually never causes adverse effects and is not nephrotoxic. After obtaining a three-dimensional dataset projections can be made at will. In addition, the individual partitions should be evaluated. The postprocessing time is about 15 min per examination. Current clinical applications are diagnostic examination of (stenoses of) the aortic arch and its branches, the thoracic and abdominal aorta, the visceral vessels, the renal arteries and the peripheral arteries. The sensitivity and specificity of contrast-enhanced MRA in most studies amount to over 90%.
对比增强磁共振血管造影（MRA）包括静脉注射一种造影剂，该造影剂通过缩短血液的T1值来增加血液的信号强度。采用对比增强MRA时，采集时间短（腹主动脉和髂血管少于40秒），获得的图像可准确解读。目前使用的造影剂几乎不会引起不良反应，也无肾毒性。获得三维数据集后可随意进行投影。此外，应评估各个分区。每次检查的后处理时间约为15分钟。目前的临床应用是对主动脉弓及其分支、胸主动脉和腹主动脉、内脏血管、肾动脉和外周动脉（狭窄情况）进行诊断检查。在大多数研究中，对比增强MRA的敏感性和特异性均超过90%。
