PULMONARY VASCULATURE - SINGLE BREATH-HOLD MR IMAGING WITH PHASED-ARRAY COILS

被引:49
作者
FOO, TKF [1 ]
MACFALL, JR [1 ]
HAYES, CE [1 ]
SOSTMAN, HD [1 ]
SLAYMAN, BE [1 ]
机构
[1] DUKE UNIV,MED CTR,DEPT RADIOL,DURHAM,NC 27710
关键词
LUNG; MR; MAGNETIC RESONANCE (MR); IMAGE PROCESSING; RAPID IMAGING; RECONSTRUCTION ALGORITHMS; PULMONARY ARTERIES; PULMONARY VEINS;
D O I
10.1148/radiology.183.2.1561352
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];
摘要
The authors obtained magnetic resonance images of the pulmonary vasculature with reduced artifacts caused by cardiac and respiratory motion by acquiring a series of moderately thin sections in a single breath-hold with an ultrafast gradient-echo pulse sequence. The series of two-dimensional images was postprocessed with a maximum-intensity projection algorithm. Time-of-flight inflow enhancement increased the signal intensity of arteries and veins while radiofrequency phase spoiling produced limited stationary spin suppression of the chest wall. Moderately thin (8-mm) section thicknesses were used to attain the resolution necessary to visualize smaller pulmonary vascular segments up to the chest wall while the number of acquired sections was minimized. Because the body coil did not provide an adequate signal-to-noise ratio (S/N) for a single excitation and thin-section acquisitions, phased-array coils covering either the right or left lung were used to improve the S/N. The use of single breath-holds prevented the misregistration and blurring that occurred in examinations performed with multiple breath-holds.
引用
收藏
页码:473 / 477
页数:5
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