[Myocardial wall motion analysis with phase shift imaging: cine phase contrast technique].
MR imaging can be used to measure proton velocity directly as a phase shift with the bipolar gradient method. This method is applied in MR angiography as a phase contrast(PC) technique. We attempted to evaluate myocardial motion utilizing the PC technique. With the cine PC technique, 16-cardiac phased 3D velocity images of the myocardium were obtained. In normal subjects, the myocardial velocity throughout the cardiac cycle were changes regular in space as well as in time, and there was no inconsistency between the motion directions. Whereas, in cases with myocardial infarction, 3D velocity images revealed some regions with zero velocity and/or some regions which showed reverse direction motions compared with the surrounding normal myocardium.
Kawamitsu
H
H
Shimane Medical University Hospital Radiological Center.
Sugimura
K
K
Ochiai
K
K
D006321:Heart / Q000503:physiopathology; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D009200:Myocardial Contraction; D009203:Myocardial Infarction / Q000175:diagnosis / Q000503:physiopathology; D009206:Myocardium / Q000473:pathology