Magnetic resonance imaging compatible robotic system for fully automated brachytherapy seed placement - 17/08/11
, Alexandru Patriciu a, Doru Petrisor a, Dumitru Mazilu a, Herman Bagga a, Louis Kavoussi b, Kevin Cleary c, Dan Stoianovici a
Reprint requests: Michael Muntener, M.D., James Buchanan Brady Urological Institute, Johns Hopkins Hospital, 600 North Wolfe Street, Marburg 1, Baltimore, MD 21287-2101Abstract |
Objectives |
To introduce the development of the first magnetic resonance imaging (MRI)-compatible robotic system capable of automated brachytherapy seed placement.
Methods |
An MRI-compatible robotic system was conceptualized and manufactured. The entire robot was built of nonmagnetic and dielectric materials. The key technology of the system is a unique pneumatic motor that was specifically developed for this application. Various preclinical experiments were performed to test the robot for precision and imager compatibility.
Results |
The robot was fully operational within all closed-bore MRI scanners. Compatibility tests in scanners of up to 7 Tesla field intensity showed no interference of the robot with the imager. Precision tests in tissue mockups yielded a mean seed placement error of 0.72 ± 0.36 mm.
Conclusions |
The robotic system is fully MRI compatible. The new technology allows for automated and highly accurate operation within MRI scanners and does not deteriorate the MRI quality. We believe that this robot may become a useful instrument for image-guided prostate interventions.
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| This work was supported in part by the Prostate Cancer Foundation and the National Institutes of Health (CA088232). The contents are solely the responsibility of the authors and do not necessarily represent the official views of the PCF or the NIH. |
Vol 68 - N° 6
P. 1313-1317 - décembre 2006 Retour au numéro
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