[Image fusion: use in the control of the distribution of prostatic biopsies].
Prostate biopsies are performed under 2D TransRectal UltraSound (US) guidance by sampling the prostate according to a predefined pattern. Modern image processing tools allow better control of biopsy distribution. We evaluated the accuracy of a single operator performing a pattern of 12 ultrasound-guided biopsies by registering 3D ultrasound control images acquired after each biopsy. For each patient, prostate image alignment was performed automatically with a voxel-based registration algorithm allowing visualization of each biopsy trajectory in a single ultrasound reference volume. On average, the operator reached the target in 60% of all cases. This study shows that it is difficult to accurately reach targets in the prostate using 2D ultrasound. In the near future, real-time fusion of MRI and US images will allow selection of a target in previously acquired MR images and biopsy of this target by US guidance.
Mozer
Pierre
P
Service d'urologie, Groupe hospitalier Pitié-Salpêtrière, Paris. pierre.mozer@urology.jhu.edu
Baumann
Michaël
M
Chevreau
Grégoire
G
Troccaz
Jocelyne
J
D000368:Aged; D000465:Algorithms; D001706:Biopsy / Q000379:methods* / Q000592:standards; D006801:Humans; D021621:Imaging, Three-Dimensional; D053783:Magnetic Resonance Imaging, Interventional; D008297:Male; D011467:Prostate / Q000000981:diagnostic imaging* / Q000473:pathology*; D017430:Prostate-Specific Antigen / Q000097:blood; D011786:Quality Control; D018084:Ultrasonography, Interventional / Q000379:methods
D017430:Prostate-Specific Antigen