Yoko
Saito1, Minoru Osanai2, Kazuhiko Oyu2, Keito
Hamada2, Hiraku Yodono3
1Graduate School of Health Sciences, Hirosaki
University , Hirosaki, Aomori, Japan; 2Graduate School of Health
Sciences, Hirosaki University, Hirosaki, Aomori, Japan; 3Radiology,
Narumi Hospital, Hirosaki, Aomori, Japan
We
evaluated the stenotic degree of arteries at the skull base level which are
demonstrated on both 3D-TOF MRA and CE-MRA in 139 cases (659 vessels ). The
discrepancy between these two technique in grading steotic degree occurred in
80 arteries. The stenotic grading were more severely estimated with CE MRA
than with TOF MRA.We also performed phantom study. TOF-MRA tended to
demonstrate the phantom more accurately than CE-MRA. On TOF-MRA with 1.6mm
slice thickness, diameters were most accurately demonstrated. In CE-MRA,
diameters of the tube were significantly more accurate with parallel imaging
than with ZIP.
Keywords