作者
Martin R Prince, Thomas L Chenevert, TK Foo, Frank J Londy, Jennifer S Ward, Jeffrey H Maki
发表日期
1997/4
期刊
Radiology
卷号
203
期号
1
页码范围
109-114
简介
PURPOSE
To improve gadolinium-enhanced magnetic resonance (MR) angiogram quality by automatically synchronizing acquisition of central k-space image data with the arterial phase of contrast material bolus infusion. MATERIALS AND METHODS
A spin-echo pulse sequence with orthogonal 90 degrees and 180 degrees pulses was used to monitor signal in a single 4 x 4 x 12-cm voxel that encompassed a segment of aorta. An increase in signal that corresponded to the arrival of gadolinium was used to trigger three-dimensional, spoiled gradient-echo abdominal MR angiography in 50 adult patients. RESULTS
Arterial signal intensity increased 28-fold with automatic compared to 19-fold with manual triggering (P < .05) at an approximate dose of 0.3 mmol/kg. Automatic triggering with a lower dose (approximately 0.2 mmol/kg) resulted in 20-fold arterial enhancement, which is comparable with enhancement …引用总数
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MR Prince, TL Chenevert, TK Foo, FJ Londy, JS Ward… - Radiology, 1997