Patent ID: 8463014
Filing Date: 2013-06-11
Classification: A61B

Abstract:
1. A method for determining an optimal trajectory for rotational X-ray angiography for vessel like structures with a C-arm X-ray system, wherein a C-arm of the C-arm X-ray system has at least two degrees of freedom defined by a rotational, propeller-type movement of the C-arm expressed in a right or left coronary artery oblique angle α, and a roll motion of the C-arm expressed in a caudal or cranial angle β, the method comprising the acts of: generating by a processor a 3-dimensional representation of a centre-line of a body vessel in a region of interest; generating an optimal view map; displaying the optimal view map on a display; and calculating an optimal trajectory, wherein the optimal trajectory is at least defined by movements of the C-arm within its at least two degrees of freedom allowing image projections with minimal foreshortening and/or overlap while minimizing an exposure of a region of interest to X-ray, wherein the act of calculating an optimal trajectory comprises the acts of minimizing the following equation: wherein: κ is a weighting parameter; λ is a weighting parameter; α is an angle value of the left or right coronary artery oblique angle; β is an angle value of the caudal or cranial angle; f(α, β) is a function associated with a vessel foreshortening; and O(α, β) is a function associated with a vessel overlap.