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首页> 外文期刊>Journal of magnetic resonance imaging: JMRI >Contrast-enhanced breath-hold three-dimensional magnetic resonance angiography in the evaluation of renal arteries: optimization of technique and pitfalls.
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Contrast-enhanced breath-hold three-dimensional magnetic resonance angiography in the evaluation of renal arteries: optimization of technique and pitfalls.

机译：对比增强的屏气三维磁共振血管造影在评估肾动脉中的效果：技术和缺陷的优化。

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摘要

The authors describe the optimization of a contrast-enhanced, breath-held, three-dimensional magnetic resonance angiography (CE-BH-3DMRA) technique in the assessment of the renal arteries and compare its utility with conventional x-ray angiography (XRA). Signal optimization using specific pulse sequence parameters was based on the patient's circulatory conditions, injection rate, and pulse sequence timing. Fifty-one patients (27 M, 24 F; mean age 69.7 years) were evaluated with CE-BH-3DMRA and XRA. All patients had an MR angiogram 3 months either before or after XRA. A test bolus study was performed for accurate assessment of transit time in each patient. A total of 51 patients (115 vessels) were studied in which the sensitivity and specificity for all renal artery stenoses including the proximal and mid-renal arterial segments were 96% and 92%, respectively. In-stent stenosis could only be diagnosed by quantifying flow beyond the stent using an additional triggered phase contrast cine pulse sequence. A total of 11 accessory renal arteries were correctly identified. In addition, fibromuscular dysplasia in two patients and stents in three patients were correctly identified on MRA. J. Magn. Reson. Imaging 2000;12:912-923. Copyright 2000 Wiley-Liss, Inc.
机译：作者描述了在肾动脉评估中对比增强，屏气，三维磁共振血管造影（CE-BH-3DMRA）技术的优化，并将其与常规X射线血管造影（XRA）进行了比较。使用特定脉冲序列参数的信号优化基于患者的循环状况，注射速率和脉冲序列时间。使用CE-BH-3DMRA和XRA对51例患者（27 M，24 F;平均年龄69.7岁）进行了评估。所有患者在XRA之前或之后3个月均进行了MR血管造影。进行了一个测试推注研究，以准确评估每位患者的通过时间。共研究了51名患者（115支血管），其中所有肾动脉狭窄（包括近端和中肾动脉段）的敏感性和特异性分别为96％和92％。支架内狭窄只能通过使用额外的触发相衬电影脉冲序列来量化超出支架的血流来诊断。总共正确识别了11条辅助肾动脉。此外，在MRA上已正确识别出两名患者的纤维肌发育不良和三名患者的支架。 J.Magn。雷森成像2000; 12：912-923。版权所有2000 Wiley-Liss，Inc.

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