title: Target motion compensation in MRI-guided prostate biopsy with static images.
abstract: OBJECTIVE
  MRI-guided prostate needle biopsy requires compensation for organ motion between target planning and needle placement.
  
  
  METHODS
  We propose slice-to-volume registration algorithms for tracking the prostate motion. Three orthogonal intra-operative slices are acquired in the approximate center of the prostate and registered with a high-resolution target planning volume. Both rigid and deformable scenarios were implemented. MRI-guided robotic prostate biopsy cases were analyzed retrospectively.
  
  
  RESULTS
  Average registration errors were 2.55mm for the rigid algorithm and 2.05mm for the deformable algorithm.
  
  
  CONCLUSIONS
  Slice-based tracking appears to be promising. Deformable registration does not seem warranted.
authors.affiliation: Department of Electrical and Computer Engineering, Queen's University, Kingston, Canada K7L3N6. hadi.tadayyon@queensu.ca
authors.forename: Hadi
authors.initials: H
authors.lastname: Tadayyon
authors.forename: Andras
authors.initials: A
authors.lastname: Lasso
authors.forename: Sean
authors.initials: S
authors.lastname: Gill
authors.forename: Aradhana
authors.initials: A
authors.lastname: Kaushal
authors.forename: Peter
authors.initials: P
authors.lastname: Guion
authors.forename: Gabor
authors.initials: G
authors.lastname: Fichtinger
mesh_terms: D000465:Algorithms; D001706:Biopsy; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D009068:Movement / Q000502:physiology*; D011467:Prostate / Q000473:pathology*