Abstract #2813

A Novel Technique for 4D Time-of-Flight MR Angiography using Double Adiabatic Inversion Recovery Pulses

Susumu Takano¹, Tetsuo Ogino², Shuhei Shibukawa^1,3, Tomohiko Horie¹, Isao Muro⁴, Nao Kajihara¹, Toshiki Saito¹, Tetsu Niwa⁵, Toshiki Kazama⁵, and Yutaka Imai⁵

¹Department of Radiology, Tokai University Hospital, Kanagawa, Japan, ²Healthcare department, Philips Electronics Japan, Tokyo, Japan, ³Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan, ⁴Department of Radiology, Tokai University Hachiouji Hospital, Tokyo, Japan, ⁵Radiology, Tokai University School of Medicine, Kanagawa, Japan

Although previously developed 4D time-of-flight (4D-TOF) at a 3T MR system for evaluating cerebral hemodynamics, this method did not fit at a 1.5T MR system in order to early recovery the brain tissue signals. We proposed a novel 4D-TOF technique using double adiabatic inversion recovery pulse (DIR 4D-TOF) for suppressing background recovery and depiction of intracranial artery at a 1.5T MR system. The results presented show that DIR 4D-TOF with long interval between the first and the second adiabatic inversion recovery pulses could effectively delay T₁recovery of the brain tissue and improved visibility of intracranial artery.

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