title: A method to register intra-treatment ultrasound images to pre-treatment images of prostate.
abstract: This paper describes a method to register ultrasound images (US) to pre-treatment images. The aim of the work is the information transfer between the pre-treatment imaging modality (MR or CT) and the intra-treatment imaging (US). Ultrasound images are spatially tracked by a stereo-vision system and the prostate boundaries are automatically extracted using a method that combines morphological and adaptive speckle suppression and a priori knowledge. MR/CT images are merged to construct a volume of pelvis using fuzzy logic algorithm and an MPR virtual slice corresponding to the orientation of the US image is generated from the volume. The prostate is segmented from the slice by a model-based method and rigidly registered by ICP algorithm to the US contour. Preliminary experiences gave satisfactory results with short computing time.
authors.affiliation: Institut de Technologies Médicales, Lille, France.
authors.forename: N
authors.initials: N
authors.lastname: Betrouni
authors.forename: G
authors.initials: G
authors.lastname: Palos
authors.forename: M
authors.initials: M
authors.lastname: Coulanges
authors.forename: M
authors.initials: M
authors.lastname: Vermandel
authors.forename: S
authors.initials: S
authors.lastname: Maouche
authors.forename: J
authors.initials: J
authors.lastname: Rousseau