OBJECTIVE: Time-of-flight (TOF) MR angiography has continued to evolve during the past few years. Signal loss due to flow saturation is a major problem of single-volume (slab) three-dimensional (3D) TOF technique. A multislab 3D TOF method, multiple overlapping thin slab acquisition (MOTSA), shows decreased sensitivity to the effects of flow saturation and therefore should result in better images. SUBJECTS AND METHODS: To evaluate the difference between MOTSA and the traditional single-volume 3D TOF techniques, we performed sequential, location-matched studies in 17 prospectively chosen patients with intracranial vascular abnormalities. All MOTSA and 3D TOF images were obtained after cut-film or 1024 digital angiography. RESULTS: According to specific criteria, abnormalities were better visualized with the MOTSA technique than with the single-volume 3D TOF technique. The difference was most marked in patients with more complex vascular abnormalities. CONCLUSION: We conclude that MOTSA is better than single-volume 3D TOF for showing intracranial abnormalities. The major advantage of MOTSA is decreased sensitivity to flow saturation.
OBJECTIVE: Time-of-flight (TOF) MR angiography has continued to evolve during the past few years. Signal loss due to flow saturation is a major problem of single-volume (slab) three-dimensional (3D) TOF technique. A multislab 3D TOF method, multiple overlapping thin slab acquisition (MOTSA), shows decreased sensitivity to the effects of flow saturation and therefore should result in better images. SUBJECTS AND METHODS: To evaluate the difference between MOTSA and the traditional single-volume 3D TOF techniques, we performed sequential, location-matched studies in 17 prospectively chosen patients with intracranial vascular abnormalities. All MOTSA and 3D TOF images were obtained after cut-film or 1024 digital angiography. RESULTS: According to specific criteria, abnormalities were better visualized with the MOTSA technique than with the single-volume 3D TOF technique. The difference was most marked in patients with more complex vascular abnormalities. CONCLUSION: We conclude that MOTSA is better than single-volume 3D TOF for showing intracranial abnormalities. The major advantage of MOTSA is decreased sensitivity to flow saturation.
Authors: H Uetani; M Akter; T Hirai; Y Shigematsu; M Kitajima; Y Kai; S Yano; H Nakamura; K Makino; M Azuma; R Murakami; Y Yamashita Journal: AJNR Am J Neuroradiol Date: 2012-10-18 Impact factor: 3.825
Authors: H Ishimaru; M Ochi; M Morikawa; H Takahata; Y Matsuoka; T Koshiishi; T Fujimoto; A Egawa; K Mitarai; T Murakami; M Uetani Journal: AJNR Am J Neuroradiol Date: 2007-05 Impact factor: 3.825
Authors: K Sato; M Yamada; H Kuroda; D Yamamoto; Y Asano; Y Inoue; K Fujii; T Kumabe Journal: AJNR Am J Neuroradiol Date: 2016-03-03 Impact factor: 3.825
Authors: Faisal Mohammad Amin; Elisabet Lundholm; Anders Hougaard; Nanna Arngrim; Linda Wiinberg; Patrick Jh de Koning; Henrik Bw Larsson; Messoud Ashina Journal: J Headache Pain Date: 2014-05-07 Impact factor: 7.277