Abstract #1417
Feedback field control in 3D T 2 * imaging at 7T
Yolanda Duerst 1 , Michael Wyss 1 , Bertram J Wilm 1 , Benjamin E Dietrich 1 , Simon Gross 1 , David O Brunner 1 , Thomas Schmid 1 , and Klaas P Pruessmann 1
1
ETH Zurich, Zurich, ZH, Switzerland
Field changes due to respiratory motion disturb
T2*-weighted imaging not only in 2D acquisition but also
in 3D. Due to the inherent averaging of 3D scans,
artifacts were not as pronounced as in 2D in the upper
parts of the brain but manifested as a general blurring
of the image. However, 3D T2*-weighted scans showed
strong ringing artifacts around cavities as well as
intensity modulations in the cerebellum. By using
real-time field feedback breathing induced
spatiotemporal field changes could be corrected and the
observed artifacts were strongly reduced.
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