title: Software strategy for robotic transperineal prostate therapy in closed-bore MRI.
abstract: A software strategy to provide intuitive navigation for MRI-guided robotic transperineal prostate therapy is presented. In the system, the robot control unit, the MRI scanner, and open-source navigation software are connected to one another via Ethernet to exchange commands, coordinates, and images. Six states of the system called "workphases" are defined based on the clinical scenario to synchronize behaviors of all components. The wizard-style user interface allows easy following of the clinical workflow. On top of this framework, the software provides features for intuitive needle guidance: interactive target planning; 3D image visualization with current needle position; treatment monitoring through real-time MRI. These features are supported by calibration of robot and image coordinates by the fiducial-based registration. The performance test shows that the registration error of the system was 2.6 mm in the prostate area, and it displayed real-time 2D image 1.7 s after the completion of image acquisition.
authors.affiliation: Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St., Boston, MA 02115, USA. tokuda@bwh.harvard.edu
authors.forename: Junichi
authors.initials: J
authors.lastname: Tokuda
authors.forename: Gregory S
authors.initials: GS
authors.lastname: Fischer
authors.forename: Csaba
authors.initials: C
authors.lastname: Csoma
authors.forename: Simon P
authors.initials: SP
authors.lastname: DiMaio
authors.forename: David G
authors.initials: DG
authors.lastname: Gobbi
authors.forename: Gabor
authors.initials: G
authors.lastname: Fichtinger
authors.forename: Clare M
authors.initials: CM
authors.lastname: Tempany
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Hata
mesh_terms: D001918:Brachytherapy / Q000379:methods*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D053783:Magnetic Resonance Imaging, Interventional / Q000379:methods*; D008297:Male; D009339:Needles; D011471:Prostatic Neoplasms / Q000473:pathology / Q000532:radiotherapy*; D011881:Radiotherapy, Computer-Assisted / Q000379:methods*; D012371:Robotics / Q000379:methods; D012984:Software; D012985:Software Design