CARDIAC-GATED MR-ANGIOGRAPHY OF PULSATILE FLOW - K-SPACE STRATEGIES

被引：13

作者：

FRANCK, A

SELBY, K

VANTYEN, R

NORDELL, B

SALONER, D

机构：

[1] Department of Medical Radiation Physics, Karollnska Institute, Stockholm

[2] Department of Hospital Physics, Karollnska Institute, Stockholm

[3] Department of Radiology, University of California, San Francisco, California

[4] Department of Radiology Service, Veterans Administration Medical Center, San Francisco, California

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1995年 / 5卷 / 03期

关键词：

GATING STUDIES; IMAGE PROCESSING; K-SPACE; PULSE SEQUENCES; VASCULAR STUDIES;

D O I：

10.1002/jmri.1880050314

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Signal strength in time-of-flight magnetic resonance (MR) angiography of pulsatile flow is modulated by the time-varying intraluminal magnetization strength. The specific appearance of MR angiographic images therefore depends on the relationship of different phase-encoding steps to the pulsatile flow waveform. Cardiac-phase gating can be applied with phase-encoding reordering to acquire different regions of k-space during the desired phases of the cardiac cycle. The authors have developed a simulation program for evaluating the merits of different encoding strategies for pulsatile flow. The model was validated with phantom studies. High signal intensity relative to that in conventional MR angiographic studies can be attained with strategies that impose relatively small penalties in total acquisition time.

引用

页码：297 / 307

页数：11

共 13 条

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