[Contrast-enhanced MR venography of the head using magnetization prepared rapid gradient echo imaging: comparison between head and body radiofrequency transmitter coil systems].
OBJECTIVE
To evaluate the image quality and vascular selectivity of MR venography of the head using an MP-RAGE technique when obtained with a body radiofrequency transmitter coil system.


METHODS
A total of 24 patients were imaged with a head or body RF transmission system. Subtraction MRA was processed with 0.1 mmol Gd-DTPA administration, and signal-to-noise ratios of the vascular system were measured. Venous demonstration and selectivity were also assessed.


RESULTS
MP-RAGE MR venography with a body transmission system showed almost the same signal intensity for the venous and arterial systems, resulting in nonspecific vascular demonstration, while the head transmission system showed semi-selective venograms owing to inflow-induced high signal on precontrast images. However, MRA with a body transmission system provided a 1.5- to 2.5-fold higher signal-to-noise ratios based on higher gradient performance and excellent demonstration of the head veins, especially those below the skull base.


CONCLUSIONS
Although selective venography was difficult, MRA with a body transmission coil provided excellent vascular images of the brain.
Department of Radiology, Saitama Medical School.
Satosi
S
Matsunobu
Makoto
M
Amanuma
Shunji
S
Tsukuda
D002550:Cerebral Veins / Q000473:pathology*; D017352:Echo-Planar Imaging / Q000379:methods*; D005260:Female; D019786:Gadolinium DTPA; D006257:Head / Q000473:pathology; D006801:Humans; D007089:Image Enhancement; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged
D019786:Gadolinium DTPA