3 T v 1.5 T MRI prostate with total hip prosthesis

Discussion:

Multiparametric MRI prostate has rapidly increased in popularity in the last three years following the release of PI-RADS v2 in 2015.  It is a robust reporting protocol and can be used for both 1.5 and 3 T MRI scanners although 3 T has become the standard especially for DWI sequences with long b values (DWI being the keystone to cancer diagnosis, especially in the peripheral zone).  Susceptibility artifact is heightened with the use of 3 T especially in relation to bowel gas in the rectum and any metal hardware such as a hip prosthesis.  This has been addressed to some degree by meticulous bowel preparation and use of different EPI sequences for DWI acquisition including read-out segmented multishot EPI rather than single shot effectively reducing the Te.  Modern 1.5 T MRI of the prostate with improved gradients can produce very diagnostic images and, as in this case, are less prone to susceptibility artifact.

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