title: Development of 2D+T tracking algorithm in ultrasound images for radiotherapy.
abstract: The aim of this study is to develop and validate a deformable tracking algorithm for monitoring the motion of the target volume on 2D ultrasound (US) images during a radiotherapy fraction. The proposed method is applied on images acquired with a transperineal ultrasound (TP-US) probe on 31 treatment patient's sessions, treated with a prostate or after a surgery, called a prostatectomy. The developed algorithm is based on Speeded-Up Robust Features (SURF) to find and match the corresponding salient points in the reference and moving images, and Thin Plate Spline (TPS) to warp the image. The results are promising and show that the proposed algorithm performs well with either artificial transforms, or in comparison with a rigid intensity based algorithm used in clinic.
authors.forename: Abdenaceur
authors.initials: A
authors.lastname: Abdouni
authors.forename: Benoit
authors.initials: B
authors.lastname: Presles
authors.forename: Marie
authors.initials: M
authors.lastname: Fargier-Voiron
authors.forename: Simon
authors.initials: S
authors.lastname: Rit
authors.forename: David
authors.initials: D
authors.lastname: Sarrut
mesh_terms: D000465:Algorithms; D006801:Humans; D008297:Male; D009038:Motion; D011467:Prostate; D011468:Prostatectomy; D011878:Radiotherapy; D014463:Ultrasonography