0.5T-MRIを用いた頭部領域における少量造影剤投与3D-time of flight MR-venographyの検討

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The purpose of this study was to determine the volume of contrast medium sufficient for three-dimensional (3D) time-of-flight (TOF) MR-venography (MRV) of the intracranial venous systemS. 3D-TOF MRV was performed with contrast medium(Gd-DTPA: 0 ml, 5 ml, 15 ml)on 20 subjects. With the 3D-TOF sequence, post-processing maximum intensity projection (MIP)images were constructed throughout the entire imaging volume. Visual evaluation of the five stages by five radiologists with at least three years of experience was performed in respect to the independence of contrast medium volume from the suppression effect of arteries and visualization of the deep cerebral veins. The deep cerebral veins and transverse sinus were not clearly visualized on 3D-TOF MRV without contrast medium. "Excellent" and "good" evaluations accounted for 72% in terms of the suppression effect of the artery in the group administered 5 ml. This rate was significantly higher than the 33% in the group administered 15 ml. "Excellent" and "good" evaluations accounted for 68 % in terms of visualization of the deep cerebral veins in the 5-ml group, a significantly a higher rate than the 44% in the 15-ml group. In the examination of contrast medium volume independence in an identical case, the artery suppression effect occurred at a rate of 100% in the comparison of 5 ml administration with 15 ml administration. In conclusion, when carried out with a small amount of contrast medium (about 5 ml), 3D-TOF MRV was useful for demonstrating the intracranial venous system.
公益社団法人日本放射線技術学会の論文
2001-06-20

0.5T-MRIを用いた頭部領域における少量造影剤投与3D-time of flight MR-venographyの検討

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