Abstract #2555
Single-shot and Readout Segmented EPI: Geometric Fidelity of 3T Prostate DWI
Andriy Fedorov 1 , Kemal Tuncali 1 , Lawrence P. Panych 1 , Janice Fairhurst 1 , Clare Tempany 1 , and Stephan E. Maier 1
1
Department of Radiology, Brigham and Women's
Hospital, Boston, MA, United States
We compare image quality and distortion in the prostate
diffusion-weighted MRI using single-shot EPI (SS-DWI)
and multi-shot readout segmented EPI (MS-DWI) in
clinical patients (N=12) undergoing in-bore MRI-guided
prostate biopsy. The use of MS-DWI led to marked
reduction of distortion under conditions that resulted
in non-diagnostic SS-DWI images, with moderate increase
in scan time (2 vs 3:30 min). Image quality and
distortion severity were strongly correlated with the
presence of air for SS-DWI, but not for MS-DWI.
Distortion reduction agreed with the theoretically
expected values. MS-DWI is thus preferable for improved
accuracy of prostate target localization and
interventional applications.
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