ISSN:
1352-8661
Schlagwort(e):
MR flowmetry
;
phase mapping
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Medizin
,
Physik
Notizen:
Abstract The influences of several primary imaging parameters on flow measurements made by the magnetic resonance phase mapping technique have been studied. In cine phase mapping, the echo time and flip angle had minimal effect on the flow measurement. Velocity sensitivity, slice thickness, and slice position were found to have well-behaved effects on the flow measurements. Angulation of either the slice or the tube away from normal intersection significantly affected the flow measurement. Further, the effect differs with the axis of rotation of the slice. Compensation for tube angulation by slice angulation improves flow measurements. Phase mapping is, thus, most heavily affected by gradient-related parameters. Hard limits on the choice of imaging parameters are few, but appropriate choices can compensate for or prevent some systematic errors.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01705259
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