| 杨学东,王霄英,许玉峰,蒋学祥.3.0T MR 上LAVA肾动脉成像的初步研究:与CEMRA对照[J].中国医学影像技术,2007,23(9):1392~1396 |
| 3.0T MR 上LAVA肾动脉成像的初步研究:与CEMRA对照 |
| Renal artery angiography of liver acquisition with acceleration volume acquisition compared with CEMRA: initial experience |
| 投稿时间：2007-03-10 修订日期：2007-04-28 |
| DOI： |
| 中文关键词: 肾动脉 动态增强 磁共振血管造影术 |
| 英文关键词:Renal artery Dynamic contrast-enhanced Magnetic resonance angiography |
| 基金项目: |
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| 中文摘要: |
| 目的 评价3.0T MR扫描仪上常规上腹部LAVA扫描动脉期图像重建对肾动脉的显示情况。方法 随机选择因怀疑肝脏病变而行肝LAVA扫描的病人15例,选取动脉早期图像,在横轴位测量双肾动脉信噪比(SNR)、肾动脉与肾周脂肪的对比噪声比(CNR),将横轴位图像进行三维MIP重建。随机选择因怀疑肾动脉病变而行CEMRA检查的病人15例,在冠状位分别测量肾动脉的SNR、CNR,后进行三维MIP重建。由两位观察者单独评价两组的三维图像质量、肾动脉分支及肾静脉伪影。对测量结果和图像质量评分进行统计学处理。结果 LAVA组与CEMRA组肾动脉的SNR分别为94.99±24.30和94.73±36.43;CNR分别为82.16±21.40和76.35±34.14。SNR及CNR在两组间的差异均无统计学意义(P>0.05)。LAVA组重建所得肾动脉图像达到诊断要求者:前后位66.7%;上下位93.3％。前后位观察LAVA组肾动脉图像质量低于CEMRA组,而上下位、肾静脉伪影以及肾动脉分支方面两者间无显著差异。结论 LAVA序列具有较高的信噪比,而且一次扫描除了获得血管的信息外还可同时获得更多的额外信息。已行上腹部LAVA扫描者若怀疑肾动脉病变可用动脉期横轴位图像进行肾动脉重建进行初步观察。 |
| 英文摘要: |
| Objective To evaluate the image quality of renal artery angiography reconstructed from routine LAVA scan on 3.0T MR. Methods Fifteen patients with suspected liver diseases who had performed LAVA scan were included in this study. On axial images of the arterial phase, bilateral SNR and CNR (contrast with perirenal fat) of renal artery were measured and 3D MIP images of angiography were reconstructed. Fifteen patients with suspected renal artery stenosis who had performed CEMRA were also included in this study. Bilateral SNR and CNR (contrast with perirenal fat) of renal artery were measured on the coronal images and 3D MIP images of angiography were reconstructed too. Two observers separately evaluated the images of two groups and gave the scores of image quality, grades of artery branch and scores of renal venous artifact. The results of measurement and image quality scores were statistically analyzed. Results SNR of LAVA group and CEMRA group was 94.99±24.30 and 94.73±36.43 respectively;CNR was 82.16±21.40 and 76.35±34.14 respectively. There was no significant difference between two groups with SNR and CNR (P>0.05). Renal artery angiography from LAVA group reached the request of diagnosis quality: 66.7% on anterior-posterior view and 93.3％ on superior-inferior view. On anterior-posterior view, the image quality of LAVA group was significantly lower than that of CEMRA group, but no significant difference was found between superior-inferior view image quality, venous artifact and grades of artery branches. Conclusion LAVA sequence has high SNR. One scan can provide more information other than angiography. If renal artery stenosis is suspected after LAVA scan, artery angiography can be reconstructed from axial images and initial diagnosis can be reached. |
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