Title :
Effect of spatial orientation on the image-intensifier distortion in quantitative coronary angiography
Author :
Gronenschild, E.
Author_Institution :
Dept. of Med. Inf., Limburg Univ., Maastricht, Netherlands
Abstract :
The effect of spatial orientation of the X-ray gantry on the geometric image distortion caused by the image intensifier (II) is assessed. Variations in absolute positions up to 0.6 mm (14 cm II size), 1.1 mm (17 cm), and 2.8 mm (27 cm) are found for the used Hicor X-ray system. The pixel size varies up to 0.8% (14 cm), 1.1% (17 cm), and 2.3% (27 cm). It is concluded that for accurate quantitative coronary angiography and 3D reconstructions it is necessary to measure the distortion and to correct for it at each of the used orientations
Keywords :
angiocardiography; 14 to 27 cm; 3D reconstructions; Hicor X-ray system; X-ray gantry; absolute positions variations; image-intensifier distortion; medical diagnostic imaging; pixel size; quantitative coronary angiography; spatial orientation effect; Angiography; Biomedical informatics; Cranial; Distortion measurement; Image analysis; Image intensifiers; Image reconstruction; Optical imaging; Polynomials; X-ray imaging;
Conference_Titel :
Computers in Cardiology 1993, Proceedings.
Conference_Location :
London
Print_ISBN :
0-8186-5470-8
DOI :
10.1109/CIC.1993.378332
