title: Real-time 3D position reconstruction of guidewire for monoplane X-ray.
abstract: We present a novel real-time method for the 3D reconstruction of the guidewire using a monoplane X-ray. The method consists of two steps: (1) the backprojection step to reconstruct a 3D surface that contains the guidewire and (2) the optimization step to select a curve on the surface that is the best match under the pre-specified constraints. The proposed method utilizes a priori knowledge in the form of a volume that indicates positions of the blood vessels and thus restricts the reconstruction. The reconstruction precision is limited by the local thickness of the vessels. The method is quantitatively evaluated on five phantom datasets and qualitatively on two patient datasets. For the phantom datasets the average reconstruction error is resolution limited to 1-2 voxels and is biased in the depth direction. The worst-case reconstruction error for any point, including the guidewire tip, is not larger than the local vessel thickness. A visual inspection of results for the patient datasets shows the guidewire is always placed in the proper vessel and is aligned with the 2D image, which is sufficient for the guidewire navigation. The developed implementation achieves the processing speed of 12 fps using Core™i7 CPU 920 at 2.67 GHz.
authors.affiliation: University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3, HR-10000 Zagreb, Croatia. Electronic address: tomislav.petkovic.jr@fer.hr.
authors.forename: T
authors.initials: T
authors.lastname: Petković
authors.affiliation: Philips Healthcare, 5680 DA Best, The Netherlands. Electronic address: robert.homan@philips.com.
authors.forename: R
authors.initials: R
authors.lastname: Homan
authors.affiliation: University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3, HR-10000 Zagreb, Croatia. Electronic address: sven.loncaric@fer.hr.
authors.forename: S
authors.initials: S
authors.lastname: Lončarić
mesh_terms: D000465:Algorithms; D000792:Angiography / Q000295:instrumentation / Q000379:methods*; D003199:Computer Systems; D057918:Fiducial Markers; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015641:Radiography, Interventional / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
keywords: Computer-aided intervention; Guidewire reconstruction; Guidewire tracking; Monoplane X-ray