MR Imaging of Slow-flow Using a Flow Phantom.
- Author:
Dae Cheol CHEONG
1
;
Kyung Jae JUNG
;
Young Hwan LEE
;
Nak Kwan SUNG
;
Duck Soo CHUNG
;
Ok Dong KIM
;
Jong Ki KIM
Author Information
1. Department of Radiology, College of medicine, Catholic University of Taegu, Korea. jkkim@cuth.cataegu.ac.kr
- Publication Type:Original Article
- Keywords:
slow flow;
GRASS;
Phase contrast;
Spine echo;
flow imaging
- MeSH:
Catheters;
Glass;
Magnetic Resonance Imaging*;
Poaceae;
Thrombosis;
Ventriculoperitoneal Shunt
- From:Journal of the Korean Society of Magnetic Resonance in Medicine
2001;5(2):116-122
- CountryRepublic of Korea
- Language:English
-
Abstract:
Purpose : To find sensitivity of MRI imaging methods to slow flow phantom study was performed with conventional Spin-Echo, gradient echo based Phase Contrast, fast GLASS, and heavily T2-weighted Fast Spin Echo pulse sequences. MATERIALS AND METHODS: A siphon driven flow phantom was constructed with a ventriculo-peritoneal shunt catheter and a GE phantom to achieve continuous variable flow. Four different pulse sequences including Spin-Echo, Phase Contrast, GRASS and Heavily T2-weighted Fast Spin Echo were evaluated to depict slow flow in the range from 0.08 ml/min to 1.7 ml/min and to compare signal intensities between static fluid and flowing fluid. RESULTS: In the slow flow above 0.17 ml/min conventional Spin-Echo showed superior apparent contrast between static and flowing fluid while GRASS was more sensitive to the very slow flow below 0.17 ml/min. It was not accurate to calculate flow and velocity below 0.1 ml/min with a modified PC imaging. CONCLUSION: Four different MR pulse sequences demonstrated different sensitivity to the range of slow flow from 0.08 ml/min to 1.7 ml/min. This finding may be clinically useful to measure CSF shunt flow or detecting CSF collection and thrombosis.
