MR Imaging of Slow-flow Using a Flow Phantom
Journal of the Korean Society of Magnetic Resonance in Medicine
;
: 116-122, 2001.
Article
in English
| WPRIM
| ID: wpr-10129
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 ANDMETHODS:
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Thrombosis
/
Magnetic Resonance Imaging
/
Ventriculoperitoneal Shunt
/
Catheters
/
Glass
/
Poaceae
Language:
English
Journal:
Journal of the Korean Society of Magnetic Resonance in Medicine
Year:
2001
Type:
Article
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