RESPIRATORY BLUR IN 3D CORONARY MR-IMAGING

被引：50

作者：

WANG, Y ^{[1
]}

GRIST, TM ^{[1
]}

KOROSEC, FR ^{[1
]}

CHRISTY, PS ^{[1
]}

ALLEY, MT ^{[1
]}

POLZIN, JA ^{[1
]}

MISTRETTA, CA ^{[1
]}

机构：

[1] UNIV WISCONSIN,MADISON,WI

来源：

MAGNETIC RESONANCE IN MEDICINE | 1995年 / 33卷 / 04期

关键词：

CORONARY ANGIOGRAPHY; MAGNETIC RESONANCE IMAGING; RESPIRATORY MOTION; IMAGE BLUR AND GHOSTS;

D O I：

10.1002/mrm.1910330413

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：

3D MR imaging of coronary arteries has the potential to provide both high resolution and high signal-to-noise ratio, but it is very susceptible to respiratory artifacts, especially respiratory blurring. Resolution loss caused by respiratory blurring in 3D coronary imaging is analyzed theoretically and verified experimentally. Under normal respiration, the width for any Gaussian point spread function is increased to a new value that is at least several millimeters (about 3-4 mm). In vivo studies were performed to compare respiratory pseudo-gated 3D acquisition with breath-hold 2D acquisition. On average, the overall quality of a pseudo-gated 3D image is worse than that of the corresponding breath-hold 2D image (P = 0.00). In most cases, respiratory blur caused coronary arteries in pseudo-gated 3D data to have lower resolution than in breath-hold 2D data.

引用

页码：541 / 548

页数：8

共 17 条

[1] EFFECT OF RESPIRATION ON CARDIAC MOTION DETERMINED BY CINEANGIOGRAPHY - IMPLICATIONS CONCERNING 3-DIMENSIONAL HEART RECONSTRUCTION USING COMPUTER TOMOGRAPHY [J].