title: Conditional shape models for cardiac motion estimation.
abstract: We propose a conditional statistical shape model to predict patient specific cardiac motion from the 3D end-diastolic CTA scan. The model is built from 4D CTA sequences by combining atlas based segmentation and 4D registration. Cardiac motion estimation is, for example, relevant in the dynamic alignment of pre-operative CTA data with intra-operative X-ray imaging. Due to a trend towards prospective electrocardiogram gating techniques, 4D imaging data, from which motion information could be extracted, is not commonly available. The prediction of motion from shape information is thus relevant for this purpose. Evaluation of the accuracy of the predicted motion was performed using CTA scans of 50 patients, showing an average accuracy of 1.1 mm.
authors.affiliation: Dept. of Rad. and Med. Informatics, Erasmus MC, Rotterdam, The Netherlands.
authors.forename: Coert
authors.initials: C
authors.lastname: Metz
authors.forename: Nora
authors.initials: N
authors.lastname: Baka
authors.forename: Hortense
authors.initials: H
authors.lastname: Kirisli
authors.forename: Michiel
authors.initials: M
authors.lastname: Schaap
authors.forename: Theo
authors.initials: T
authors.lastname: van Walsum
authors.forename: Stefan
authors.initials: S
authors.lastname: Klein
authors.forename: Lisan
authors.initials: L
authors.lastname: Neefjes
authors.forename: Nico
authors.initials: N
authors.lastname: Mollet
authors.forename: Boudewijn
authors.initials: B
authors.lastname: Lelieveldt
authors.forename: Marleen
authors.initials: M
authors.lastname: de Bruijne
authors.forename: Wiro
authors.initials: W
authors.lastname: Niessen
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D006321:Heart / Q000000981:diagnostic imaging* / Q000502:physiology*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008953:Models, Anatomic; D008955:Models, Cardiovascular; D015233:Models, Statistical; D009068:Movement / Q000502:physiology*; D010363:Pattern Recognition, Automated / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*