title: 2D/3D registration of TEE probe from two non-orthogonal C-arm directions.
abstract: 2D/3D registration is a well known technique in medical imaging for combining pre-operative volume data with live fluoroscopy. A common issue of this type of algorithms is that out-of-plane parameters are hard to determine. One solution to overcome this issue is the use of X-ray images from two angulations. However, performing in-plane transformation in one image destroys the registration in the other image, particularly if the angulations are smaller than 90 degrees apart. Our main contribution is the automation of a novel registration approach. It handles translation and rotation of a volume in a way that in-plane parameters are kept invariant and independent of the angle offset between both projections in a double-oblique setting. Our approach yields more robust and partially faster registration results, compared to conventional methods, especially in case of object movement. It was successfully tested on clinical data for fusion of transesophageal ultrasound and X-ray.
authors.forename: Markus
authors.initials: M
authors.lastname: Kaiser
authors.forename: Matthias
authors.initials: M
authors.lastname: John
authors.forename: Tobias
authors.initials: T
authors.lastname: Heimann
authors.forename: Alexander
authors.initials: A
authors.lastname: Brost
authors.forename: Thomas
authors.initials: T
authors.lastname: Neumuth
authors.forename: Georg
authors.initials: G
authors.lastname: Rose
mesh_terms: D000465:Algorithms; D017548:Echocardiography, Transesophageal / Q000379:methods*; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D064847:Multimodal Imaging / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D014057:Tomography, X-Ray Computed / Q000379:methods*