Evaluation of a robotic technique for transrectal MRI-guided prostate biopsies

Martijn G. Schouten, Joyce G.R Bomers, Derya Yakar, Henkjan Huisman, Eva Rothgang, Dennis Bosboom, Tom W.J. Scheenen, Sarthak Misra, Jurgen J. Fütterer

    Research output: Contribution to journalArticleAcademicpeer-review

    46 Citations (Scopus)


    Objectives To evaluate the accuracy and speed of a novel robotic technique as an aid to perform magnetic resonance image (MRI)-guided prostate biopsies on patients with cancer suspicious regions. Methods A pneumatic controlled MR-compatible manipulator with 5 degrees of freedom was developed in-house to guide biopsies under real-time imaging. From 13 consecutive biopsy procedures, the targeting error, biopsy error and target displacement were calculated to evaluate the accuracy. The time was recorded to evaluate manipulation and procedure time. Results The robotic and manual techniques demonstrated comparable results regarding mean targeting error (5.7 vs 5.8 mm, respectively) and mean target displacement (6.6 vs 6.0 mm, respectively). The mean biopsy error was larger (6.5 vs 4.4 mm) when using the robotic technique, although not significant. Mean procedure and manipulation time were 76 min and 6 min, respectively using the robotic technique and 61 and 8 min with the manual technique. Conclusions Although comparable results regarding accuracy and speed were found, the extended technical effort of the robotic technique make the manual technique – currently – more suitable to perform MRI-guided biopsies. Furthermore, this study provided a better insight in displacement of the target during in vivo biopsy procedures.
    Original languageEnglish
    Pages (from-to)476-483
    Number of pages8
    JournalEuropean radiology
    Issue number2
    Publication statusPublished - 2012


    • EWI-23060
    • IR-84158
    • METIS-296297


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