Design and preliminary accuracy studies of an MRI-guided transrectal prostate intervention system

Authors:
Axel Krieger;Csaba Csoma;Iulian I. Iordachita;Peter Guion;Anurag K. Singh;Gabor Fichtinger;Louis L. Whitcomb
Affiliations:
Department of Mechanical Engineering, Johns Hopkins University, Baltimore;Department of Mechanical Engineering, Johns Hopkins University, Baltimore;Department of Mechanical Engineering, Johns Hopkins University, Baltimore;NCI, NIH, DHHS, Bethesda;NCI, NIH, DHHS, Bethesda;Department of Mechanical Engineering, Johns Hopkins University, Baltimore;Department of Mechanical Engineering, Johns Hopkins University, Baltimore
Venue:
MICCAI'07 Proceedings of the 10th international conference on Medical image computing and computer-assisted intervention
Year:
2007

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Abstract

This paper reports a novel system for magnetic resonance imaging (MRI) guided transrectal prostate interventions, such as needle biopsy, fiducial marker placement, and therapy delivery. The system utilizes a hybrid tracking method, comprised of passive fiducial tracking for initial registration and subsequent incremental motion measurement along the degrees of freedom using fiber-optical encoders and mechanical scales. Targeting accuracy of the system is evaluated in prostate phantom experiments. Achieved targeting accuracy and procedure times were found to compare favorably with existing systems using passive and active tracking methods. Moreover, the portable design of the system using only standard MRI image sequences and minimal custom scanner interfacing allows the system to be easily used on different MRI scanners.