Abstract #0342

T2-weighted MRI-derived textural features can help the assessment of peripheral zone prostate cancer aggressiveness: results from multi-center data.

Gabriel Nketiah¹, Mattijs Elschot¹, Tom W Scheenen², Marnix C Maas², Tone F Bathen^1,3, and Kirsten M Selnæs^1,3

¹Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway, ²Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, Netherlands, ³St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway

The assessment of prostate cancer aggressiveness is currently based on Gleason grading of histological samples obtained by TRUS-guided biopsies, which can lead to substantial underestimations due to sampling errors. We previously showed that textural features derived from T2-weighted MRI could potentially serve as a non-invasive biomarker for prostate cancer aggressiveness. The aim of this work was to validate these preliminary results in a multi-center study. We found that the combination of intensity and textural features could distinguish between low/intermediate and high-grade with an accuracy of 71%, which was significantly higher than intensity (60%) or textural features (68%) alone.

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