title: Automatic aorta segmentation and valve landmark detection in C-arm CT: application to aortic valve implantation.
abstract: C-arm CT is an emerging imaging technique in transcatheter aortic valve implantation (TAVI) surgery. Automatic aorta segmentation and valve landmark detection in a C-arm CT volume has important applications in TAVI by providing valuable 3D measurements for surgery planning. Overlaying 3D segmentation onto 2D real time fluoroscopic images also provides critical visual guidance during the surgery. In this paper, we present a part-based aorta segmentation approach, which can handle aorta structure variation in case that the aortic arch and descending aorta are missing in the volume. The whole aorta model is split into four parts: aortic root, ascending aorta, aortic arch, and descending aorta. Discriminative learning is applied to train a detector for each part separately to exploit the rich domain knowledge embedded in an expert-annotated dataset. Eight important aortic valve landmarks (three aortic hinge points, three commissure points, and two coronary ostia) are also detected automatically in our system. Under the guidance of the detected landmarks, the physicians can deploy the prosthetic valve properly. Our approach is robust under variations of contrast agent. Taking about 1.4 seconds to process one volume, it is also computationally efficient.
authors.affiliation: Siemens Corporate Research, Princeton, USA. yefeng.zheng@siemens.com
authors.forename: Yefeng
authors.initials: Y
authors.lastname: Zheng
authors.forename: Matthias
authors.initials: M
authors.lastname: John
authors.forename: Rui
authors.initials: R
authors.lastname: Liao
authors.forename: Jan
authors.initials: J
authors.lastname: Boese
authors.forename: Uwe
authors.initials: U
authors.lastname: Kirschstein
authors.forename: Bogdan
authors.initials: B
authors.lastname: Georgescu
authors.forename: S Kevin
authors.initials: SK
authors.lastname: Zhou
authors.forename: Jörg
authors.initials: J
authors.lastname: Kempfert
authors.forename: Thomas
authors.initials: T
authors.lastname: Walther
authors.forename: Gernot
authors.initials: G
authors.lastname: Brockmann
authors.forename: Dorin
authors.initials: D
authors.lastname: Comaniciu
mesh_terms: D001011:Aorta / Q000601:surgery; D001027:Aortography / Q000379:methods*; D006349:Heart Valve Diseases / Q000000981:diagnostic imaging* / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D010363:Pattern Recognition, Automated / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*