Determination of optimal angiographic viewing angles: Basic principles and evaluation study
- University Hospital, Leiden (Netherlands). Dept. of Diagnostic Radiology and Nuclear Medicine
- Delft Univ. of Technology (Netherlands). Dept. of Electrical Engineering
Foreshortening of vessel segments in angiographic (biplane) projection images may cause misinterpretation of the extent and degree of coronary artery disease. The views in which the object of interest are visualized with minimum foreshortening are called optimal views. In this paper the authors present a complete approach to obtain such views with computer-assisted techniques. The object of interest is first visualized in two arbitrary views. Two landmarks of the object are manually defined in the two projection images. With complete information of the projection geometry, the vector representation of the object in the three-dimensional space is computed. This vector is perpendicular to a plane in which the views are called optimal. The user has one degree of freedom to define a set of optimal biplane views. The angle between the central beams of the imaging systems can be chosen freely. The computation of the orientation of the object and of corresponding optimal biplane views have been evaluated with a simple hardware phantom. The mean and the standard deviation of the overall errors in the calculation of the optimal angulation angles were 1.8[degree] and 1.3[degree], respectively, when the user defined a rotation angle.
- OSTI ID:
- 7144567
- Journal Information:
- IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States), Vol. 13:1; ISSN 0278-0062
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of variable left ventricular vertical orientation on planar myocardial perfusion images
Calibration-free device sizing using an inverse geometry x-ray system