Renal arteries: evaluation with optimized 2D and 3D time-of-flight MR angiography.
Renal arteries: evaluation with optimized 2D and 3D time-of-flight MR angiography.
复制标题
肾动脉：使用优化的 2D 和 3D 飞行时间 MR 血管造影进行评估。
DOI：
10.1148/radiology.196.3.7644629
复制
发表时间：
1995
期刊：
影响因子：
19.7
通讯作者：
J. Gmeinwieser
中科院分区：
文献类型：
--
作者：
Claudia Fellner;M. Strotzer;A. Geissler;S. Kohler;B. Krämer;V. Spies;P. Held;J. Gmeinwieser
PURPOSE
To compare two-dimensional (2D) and three-dimensional (3D) time-of-flight (TOF) techniques in magnetic resonance (MR) angiography of renal arteries.
MATERIALS AND METHODS
In 46 patients, MR angiography was performed with 3D tilted optimized non-saturating excitation (TONE), 3D fast imaging with steady precession (FISP), and 2D fast low-angle shot (FLASH) during breath holding. Intraarterial angiography was used as a reference. MR angiograms were evaluated for stenoses, length of renal arteries, accessory arteries, venous overlap, and image quality.
RESULTS
The 3D TONE sequence was best for detection of severe stenoses (sensitivity, 100%; specificity, 89%), delineation of accessory arteries, and image quality. Overlap of renal veins was the most important disadvantage of 2D FLASH. Decreased saturation effects, however, can be advantageous in 2D TOF imaging.
CONCLUSION
Use of the 3D TONE sequence provided improved image quality and diagnostic value compared with 3D FISP technique. The 2D TOF sequence can be useful in combination with the 3D TONE sequence.
