2024-03-28T21:29:51Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00004126
2022-12-15T03:37:09Z
453:454
506:507:508
Duration of Enhancement and Scan Timing in Three-dimensional Contrast-enhanced MR Angiography Using the Elliptical Centric Phase-encoding Technique
Elliptical Centric法を用いた造影三次元MR Angiographyにおける造影効果持続時間および撮像タイミングに関する検討
Elliptical Centric法を用いた造影三次元MR Angiographyにおける造影効果持続時間および撮像タイミングに関する検討
八木下, 裕子
47584
大越, 幸和
47585
大久保, 真樹
47586
内藤, 健一
47587
井上, 智子
47588
蔡, 篤儀
47589
Magnetic resonance angiography(MRA)
Three-dimensional contrast enhanced magnetic resonance angiography(3D-CE MRA)
Elliptical centric phase encoding
Centric phase encoding
Phase-encding order
In the present study, we quantitatively investigated the relationship between the signal intensity in a vessel and the duration of contrast enhancement as well as scan timing in 3D contrast-enhanced MR angiography using an elliptical centric phase-encoding technique. A tube phantom filled with Gd-DTPA, acting as a vessel, was taken out from the field of view during data acquisition, by using the “pause” function of our MR scanne(r GE Signa, 1.5 Tesla), thereby simulating the presence and absence of a vessel. The shortening of the duration of enhancement corresponds to the delay of scan timing from the optimal point in the phase-encoding of the centric-ordering system. The signal intensity in a vesse(l 1-5 mm in diameter)decreased as the duration of enhancement became shorter and the diameter of the vessel decreased. When the number of partitions was 16 or 32 in a 128-mm-thick slab, the signal intensity obtained by the elliptical centric phase-encoding technique was almost the same as that obtained by the conventional centric phase-encoding technique. However, when the number of partitions was increased(64-124), and if the duration of enhancement was short, the signal intensity obtained by the elliptical centric phase-encoding technique was higher than that obtained by the conventional centric phase-encoding technique. In conclusion, in terms of the duration of enhancement and the delay of scan timing, the elliptical centric phase-encoding technique is superior to the conventional centric phase-encoding technique when the number of partitions in a slab for 3D MR angiography is increased.
journal article
日本放射線技術学会
2003-12
application/pdf
日本放射線技術学会雑誌
12
59
1555
1560
日本放射線技術学会雑誌
AN00197773
03694305
https://niigata-u.repo.nii.ac.jp/record/4126/files/jrst_59_12_1555_1560_2003.pdf
jpn