MRA of Intracranial Aneurysm Models: A Comparison of Contrast-Enhanced Three-Dimensional MRA with Time-of-Flight MRA.
Isoda, Haruo; Takehara, Yasuo; Isogai, Satoshi; Masunaga, Hatsuko; Takeda, Hiroyasu; Nozaki, Atsushi; Sakahara, Harumi
Journal of Computer Assisted Tomography.
24(2):308-315, March/April 2000.
Purpose: The purpose of our study was to compare contrast-enhanced 3D MR angiography (MRA) using ultrafast spoiled gradient-recalled acquisition in the steady state (SPGR) with 2D and 3D time-of-flight (TOF) MRA for visualization of intracranial lateral saccular aneurysm models.
Method: We used lateral saccular aneurysm models with a height of 10 mm and neck sizes of 2.5 and 10 mm. Imaging was performed using a 1.5 T MR system with a head coil. Contrast-enhanced 3D MR angiograms were obtained using 3D ultrafast SPGR sequence with and without the MR Smartprep technique. Two-dimensional and 3D TOF MR angiograms were also obtained.
Results: Contrast-enhanced multiphase 3D MR angiograms taken every 5 s after injection of contrast medium proved superior to the other MRA techniques for delineating lateral saccular aneurysm models. Contrast-enhanced 3D MRA images taken with inadequate delay after MR Smartprep trigger showed poor visualization of the aneurysm model.
Conclusion: Use of contrast-enhanced multiphase 3D MRA with ultrafast SPGR with shorter TR and TE resulted in clear images of the lateral saccular aneurysm model.
(C) 2000 Lippincott Williams & Wilkins, Inc.