Two solutions for registration of ultrasound to MRI for image-guided prostate interventions.
Ultrasound-guided prostate interventions could benefit from incorporating the radiologic localization of the tumor which can be acquired from multiparametric MRI. To enable this integration, we propose and compare two solutions for registration of T2 weighted MR images with transrectal ultrasound. Firstly, we propose an innovative and practical approach based on deformable registration of binary label maps obtained from manual segmentation of the gland in the two modalities. This resulted in a target registration error of 3.6±1.7 mm. Secondly, we report a novel surface-based registration method that uses a biomechanical model of the tissue and results in registration error of 3.2±1.3 mm. We compare the two methods in terms of accuracy, clinical use and technical limitations.
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, Canada. moradi@bwh.harvard.edu
Mehdi
M
Moradi
Firdaus
F
Janoos
Andriy
A
Fedorov
Petter
P
Risholm
Tina
T
Kapur
Luciant D
LD
Wolfsberger
Paul L
PL
Nguyen
Clare M
CM
Tempany
William M
WM
Wells
D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008954:Models, Biological; D011467:Prostate / Q000000981:diagnostic imaging / Q000601:surgery; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery; D011859:Radiography; D018084:Ultrasonography, Interventional / Q000379:methods*