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首页> 外文期刊>AJR: American Journal of Roentgenology : Including Diagnostic Radiology, Radiation Oncology, Nuclear Medicine, Ultrasonography and Related Basic Sciences >Diagnostic accuracy of intraarterial and i.v. MR angiography for the detection of stenoses of the infrainguinal arteries.
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Diagnostic accuracy of intraarterial and i.v. MR angiography for the detection of stenoses of the infrainguinal arteries.

机译：动脉内和静脉内的诊断准确性MR血管造影用于检测下动脉的狭窄。

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OBJECTIVE: The objective of our study was to prospectively evaluate the diagnostic accuracy of intraarterial (i.a.) and i.v. MR angiography (MRA) of the infrainguinal arteries in comparison with the reference standard selective digital subtraction angiography (DSA). SUBJECTS AND METHODS: Twenty consecutive patients with symptomatic peripheral arterial occlusive disease (PAOD) underwent i.v. MRA and i.a. MRA of the infrainguinal arteries and DSA, which served as the reference standard. For i.v. MRA, 27 mL of gadodiamide was injected through a peripheral arm vein; for i.a. MRA, 30 mL of diluted contrast agent (5 mL of gadodiamide in 55 mL of 0.9% saline solution) was twice injected in the superficial femoral artery with a flow rate of 2.5 mL/s through a 5-French sheath that was placed on the occasion of DSA before vascular intervention. A 3D gradient-echo sequence was performed using a dedicated coil system on a 1.5-T MR scanner. Three independent blinded observers localized and quantitatively graded stenoses on i.v. MRA and i.a. MRA. The overall impression of image quality of i.v. MRA and i.a. MRA was documented using a 4-point scale (1, excellent; 4, poor). Interobserver agreement was calculated. RESULTS: The mean sensitivity and mean specificity for the detection of stenoses >or= 50% of the upper leg arteries (i.e., superficial femoral artery and popliteal artery) were 85.5% and 83.3% for i.a. MRA and 82.2% and 86.7% for i.v. MRA, respectively. The mean sensitivity and mean specificity for the detection of stenoses >or= 50% of the lower leg arteries (i.e., proximal anterior tibial artery, tibiofibular trunk, proximal posterior tibial artery, and proximal peroneal artery) were 91.7% and 75.0% for i.a. MRA, respectively, and 87.5% each for i.v. MRA. the diagnostic quality of i.a. MRA images and i.v. MRA images was assessed as excellent or good. CONCLUSION: i.a. MRA provides sensitivity and specificity for the detection of hemodynamically significant stenoses of the infrainguinal arteries comparable to i.v. MRA and therefore is a good diagnostic tool especially for MR-guided vascular interventions.
机译：目的：我们的研究目的是前瞻性评估动脉内（i.a.）和静脉内（i.v.）的诊断准确性。与参考标准选择性数字减影血管造影（DSA）相比，龈下动脉的MR血管造影（MRA）。受试者和方法：连续二十名有症状的外周动脉闭塞性疾病（PAOD）患者接受了静脉内注射。 MRA和i.a.下动脉的MRA和DSA作为参考标准。对于i.v. MRA通过手臂周围静脉注射27 mL的gadodiamide;对于i.a.将MRA，30 mL稀释的造影剂（55 mL的0.9％盐水溶液中的5 mL葡萄糖酸二胺）通过2.5英尺/秒的流速通过股骨上的5法式鞘管注射两次进入股浅动脉。血管介入治疗前DSA的场合。在1.5-T MR扫描仪上使用专用线圈系统执行3D梯度回波序列。三名独立的盲观察者在静脉内定位并定量分级狭窄。 MRA和i.a. MRA。 i.v.的图像质量的总体印象MRA和i.a.使用4点量表记录了MRA（1分，优秀; 4分，差）。观察者间协议已计算。结果：检测到大于或等于50％的大腿动脉（即股浅动脉和pop动脉）狭窄的敏感性和平均特异性分别为85.5％和83.3％。 MRA和i.v.的82.2％和86.7％ MRA，分别。对于i.a，检测狭窄度≥50％的小腿动脉（即近端胫前动脉，胫腓骨干，胫后近端动脉和腓骨近端动脉）的平均敏感性和平均特异性分别为91.7％和75.0％。 MRA分别为i.v.的87.5％ MRA。 i.a.的诊断质量MRA图片和i.v. MRA图像被评为优秀或良好。结论：i.a. MRA为检测与i.v.因此，MRA是一种很好的诊断工具，尤其是在MR引导的血管介入治疗中。

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