VALIDATION OF CINE PHASE-CONTRAST MR-IMAGING FOR MOTION ANALYSIS

被引：41

作者：

LINGAMNENI, A ^{[1
]}

HARDY, PA ^{[1
]}

POWELL, KA ^{[1
]}

PELC, NJ ^{[1
]}

WHITE, RD ^{[1
]}

机构：

[1] CLEVELAND CLIN FDN,DEPT RADIOL,9500 EUCLID AVE,CLEVELAND,OH 44195

来源：

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

关键词：

CINE STUDIES; HEART; FUNCTION; MR; IMAGE PROCESSING; MOTION STUDIES; PHASE CORRECTION; PHASE IMAGING; VELOCITY STUDIES;

D O I：

10.1002/jmri.1880050318

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：

The accuracy of cine phase-contrast magnetic resonance (MR) imaging for motion analysis was evaluated. By using a rotating phantom and postprocessing algorithm for phase tracking, errors arising during data acquisition were identified and compensation methods were developed. A spatially varying background phase offset in the velocity images was found to be due to eddy current-induced fields. The magnitude of the offset was in the range of 0.20 cm/sec, which is of the same order of magnitude as cardiac contractile velocities. Background offset is thus an important source of error in tracking cardiac motion. Study of different tracking algorithms revealed the need for an integration scheme using motion terms higher than velocity. Also, considerable improvement in the accuracy and stability of the predicted trajectories was obtained by averaging the trajectories proceeding both forward and backward in time from the starting point. With the algorithm developed, the motion of the phantom was tracked through a complete rotation of the phantom to an accuracy of 2 pixels.

引用

页码：331 / 338

页数：8

共 20 条

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