A COMPLEX DIFFERENCE PHASE-CONTRAST TECHNIQUE FOR MEASUREMENT OF VOLUME FLOW-RATES

被引：42

作者：

POLZIN, JA

ALLEY, MT

KOROSEC, FR

GRIST, TM

WANG, Y

MISTRETTA, CA

机构：

[1] UNIV WISCONSIN,CTR MR IMAGING,DEPT RADIOL,MADISON,WI

[2] UNIV WISCONSIN,DEPT MED PHYS,MADISON,WI 53706

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1995年 / 5卷 / 02期

关键词：

FLOW QUANTIFICATION; IMAGE PROCESSING; PHASE IMAGING; VASCULAR STUDIES; VELOCITY STUDIES;

D O I：

10.1002/jmri.1880050202

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：

Magnetic resonance (MR) phase-difference methods work well for measuring volumetric flow rates when the vessel diameter is large compared with the in-plane voxel dimensions. For small vessels (eg, coronary arteries), partial-volume effects introduce substantial errors in the measured volume flow rate. To correctly measure flow rates through a voxel, both the fraction of the voxel containing moving spins and the phase shift imparted to those spins must be known, The authors propose a flow measurement method that combines information obtained with both the complex-difference and phase-difference processing techniques and thereby provides the fractional volume occupied by the moving spins and the phase of those spins, The complex-difference flow map method proposed results in improved accuracy of MIR phase-contrast flow measurements in the presence of partial-volume effects,

引用

页码：129 / 137

页数：9

共 17 条

[1]

Hahn EL, Detection of sea water motion by nuclear precession, Journal of Geophysical Research, 65, pp. 776-777, (1960)

[2]

Moran PR, A flow velocity zeugmatographic Interlace for NMR Imaging In humans, Magn Reson Imaging, 1, pp. 197-203, (1982)

[3]

Pelc NJ, Bernstein MA, Shlmakawa A, Glover GH, Encoding strategies for three‐direction phase‐contrast MR imaging of now, JMRI, 1, pp. 405-414, (1991)

[4]

Dumoulin CL, Hart HR, Magnetic resonance angiography, Radiology, 161, pp. 717-720, (1986)

[5]

Nayler GL, Firmin DN, Longmore DB, Blood flow imaging by cine magnetic resonance, J Comput Assist Tomogr, 10, pp. 715-722, (1986)

[6]

Pelc NJ, Herfkens RJ, Shimakawa A, Enzmann DR, Phase contrast magnetic resonance Imaging, Magn Reson Q, 7, pp. 229-254, (1991)

[7]

Tang C, Blatter DD, Parker DL, Accuracy of phase‐contrast flow measurements in the presence of partial‐volume effects, JMRJ, 3, pp. 377-385, (1993)

[8]

Pelc NJ, Sommer FG, Enzmann DR, Pelc LR, Glover GH, Accuracy and precision of phase‐contrast MR flow measurements (abstr), Radiology, 181, P, (1991)

[9]

Wolf RL, Ehman RL, Riederer SJ, Rossman PJ, Analysis of systematic and random error in MR volumetric flow measurements, Magn Reson Med, 30, pp. 82-91, (1993)

[10]

Pelc LR, Pelc NJ, Rayhill SC, Et al., Arterial and venous blood flow: nonlnvasive quantitation with MR imaging, Radiology, 185, pp. 809-812, (1992)

← 1 2 →