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Abstract #1135

Time-Of-Flight Angiography in Humans at 9.4T

Gisela E. Hagberg1, Petros Martirosian2, Jonas Bause3, Gunamony Shajan3, Uwe Klose4, Klaus Scheffler1, 3

1Biomedical Magnetic Resonance, University Hospital Tuebingen, Tuebingen, Germany; 2Section of Experimental Radiology, University Hospital Tuebingen, Tuebingen, Germany; 3High-field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany; 4Diagnostic and interventional Neuroradiology, University Hospital Tuebingen, Tuebingen, Germany

At ultra-high magnetic field strengths ToF benefits from long tissue T1 times that leads to a suppressed background. On the other hand, SAR restrictions impose an upper limit on the actual flip angle that can be used. By increasing the pulse duration the SAR is reduced, enabling the use of optimal flip angles. The venous signal can be removed without need for additional suppression pulses, with only minor loss in image contrast, by prolonging TE. In conclusion, ToF can be performed at 9.4T using state-of-the-art methodology.