The MIRIAM Robot: A Novel Robotic System for MR-Guided Needle Insertion in the Prostate

Pedro Moreira, Gert van de Steeg, Thijs Krabben, Jonathan Zandman, Edsko E. G. Hekman, Ferdinand van der Heijden, Ronald Borra, Sarthak Misra

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Early prostate cancer detection and treatment are of major importance to reduce mortality rate. magnetic resonance (MR) imaging provides images of the prostate where an early stage lesion can be visualized. The use of robotic systems for MR-guided inter-ventions in the prostate allows us to improve the clinical outcomes of procedures such as biopsy and brachytherapy. This work presents a novel MR-conditional robot for prostate interventions. The minimally invasive robotics in an magnetic resonance imaging environment (MIRIAM) robot has 9 degrees-of-freedom (DoF) used to steer and fire a biopsy needle. The needle guide is positioned against the perineum by a 5 DoF parallel robot driven by piezoelectric motors. A 4 DoF needle driver inserts, rotates and fires the needle during the procedure. Piezoelectric motors are used to insert and rotate the needle, while pneumatic actuation is used to fire the needle. The MR-conditional design of the robot and the needle insertion controller are presented. MR compatibility tests using T2 imaging protocol are performed showing a SNR reduction of 25% when the robot is operational within the MR scanner. Experiments inserting a biopsy needle toward a physical target resulted in an average targeting error of 1.84 mm. Our study presents a novel MR-conditional robot and demonstrated the ability to perform MR-guided needle-based interventions in soft-tissue phantoms. Moreover, the image distortion analysis indicates that no visible image deterioration is induced by the robot.
Original languageEnglish
Article number1750006
Number of pages13
JournalJournal of Medical Robotics Research
Volume2
Issue number3
DOIs
Publication statusPublished - Dec-2017

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