Martijn Gerjan Schouten1, Joyce Gerda Riek Bomers1, Derya Yakar1, Henkjan Huisman1, Tom W. J. Scheenen1, Sarthak Misra2, Jurgen J. Futterer1
1Radiology, Radboud University Nijmegen Medical Centre, Nijmegen, Gelderland, Netherlands; 2Control Engineering Group, MIRA-Institute of Biomedical Technology & Technical Medicine, Enschede, Overijssel, Netherlands
The purpose of this study was to evaluate the accuracy and speed of a novel pneumatically controlled magnetic field compatible manipulator as an aid to perform magnetic resonance image (MRI)-guided biopsies on patients with cancer suspicious regions in the prostate. 3D MR images were made with the needle inserted to determine target displacement, targeting and biopsy error. Currently, the robotic technique for transrectal real-time MR-guided prostate biopsies did not outperform the manual technique. This study provided insight into reasons for target motion during a biopsy procedure. Our results suggest that most target displacement is caused by needle insertion.