Abstract #1229

Intracranial flow measurements at 7T gated with Doppler Ultrasound

Karin Markenroth Bloch¹, Fabian Kording^2,3, and Johannes Töger⁴

¹Lund University Bioimaging Center, Lund University, Lund, Sweden, ²Dept. of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, ³nnorth medical Gmbh, Hamburg, Germany, ⁴Dept. of Diagnostic Radiology, Lund University, Lund, Sweden

Intracranial flow measurements at high field (7T) has the potential to give new information on hemodynamic properties. However, the strong field disturbs ECG gating, possibly compromising image quality. This work investigates possible benefits of using Doppler ultrasound (DUS) cardiac triggering compared to ECG–triggering in throughplane (2D) flow measurements at 7T. 2D flow was acquired using both ECG and DUS triggering in random order in healthy volunteers (n=8). The DUS was found to have a higher trigger sensitivity and fewer false negative and positive triggers. Flow and velocity results did not differ between ECG and DUS triggering.

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