Consecutive Three-dimensional Time-of-Flight MRA:Its Capacity in Determining Cerebral Arteries / 实用放射学杂志

ABSTRACT

Objective To evaluate the capacity of consecutive three-dimensional time of flight(3D-TOF)MRA and velocity-encoding(Venc)three-dimensional phase-contrast MRA(3D-PC MRA)in determining cerebral arteries.Methods 15 persons being normal on MR images,consecutive 3D-TOF and 3D-PC MR angiograms were selected prospectively to evaluate the difference between two MRA techniques in determining cerebral arteries.The 38 normal sides of 43 cerebral arteriographic cases undergone MRA and DSA were selected retrospectively to evaluate the capacity of MRA technique in determining cerebral arteries with DSA criterion.Results The branch grades of ACA,MCA or PCA demonstrated by 3D-TOF technique were not respectively different from that by 3D-PC.But the former imaging quality was much better than that of the later.The branch grades of ACA,MCA or PCA shown by MRA were respectively different from those by DSA.These grades of ACA,MCA shown by MRA were one less than those by DSA,and that of PCA shown by MRA was a few different from that by DSA.Conclusion The capacity of consecutive 3D-TOF MRA in demonstrating cerebral arteries is less than that of DSA,but it is enough to most cerebral vascular diseases.