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Motion-robust T2-weighted TSE imaging in the prostate by performing non-rigid registration between averages

Katja Bogner¹, Elisabeth Weiland², Thomas Benkert², and Karl Engelhard¹
¹Institute of Radiology, Martha-Maria Hospital, Nuremberg, Germany, ²MR Application Predevelopment, Siemens Healthcare GmbH, Erlangen, Germany

T2-weighted imaging has high relevance in prostate MRI but is prone to motion-induced blurring caused by slight displacements between averages. Non-rigid registration before averaging results in reduced motion artifacts and improves image quality and diagnostic validity.

Figure 1: Typical motion in T2-weighted imaging with averaging
(a-c) single average with degraded image quality and displacement shift
(d) combination of all averages without MOCO
(e) combination of all averages with MOCO and improved image quality

Figure 2: Improved image quality of MOCO
(a) conventional reconstruction (Likert-score 3)
(b) MOCO (Likert-score 1)