Accuracy and reproducibility of an on-line quantitative coronary angiographic system

Author

Desmet, W. ; Willems, J.L. ; Vrolix, M. ; Van Lierde, J. ; Byttebier, G. ; Piessens, J.

Author_Institution

Univ. Hospital Gasthuisberg, Leuven, Belgium

fYear

1992

Firstpage

539

Lastpage

542

Abstract

To evaluate the intraobserver and interobserver variability of an online quantitative coronary angiographic system, 166 lesions were measured three times by each of two independent observers before and after angioplasty. Before angioplasty 95% of the values for percent stenosis obtained by observers 1 and 2 were within a range of 13.2% and 15.5%, respectively, but these respective ranges increased to 19.2% and 16.8% after angioplasty. For measurements of absolute diameters of the minimal luminal diameter 95% limits of agreement between both observers were -0.26 to 0.28 before and -0.38 to 0.37 after PTCA. These ranges were independent of stenosis severity or vessel size

Keywords

cardiology; diagnostic radiography; interobserver variability; intraobserver variability; medical diagnostic imaging; minimal luminal diameter; on-line quantitative coronary angiographic system; percent stenosis; stenosis severity; vessel size; Angiography; Angioplasty; Calibration; Digital images; Hospitals; Image analysis; Lesions; Pixel; Quantum cellular automata; Reproducibility of results;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1992, Proceedings of

Conference_Location

Durham, NC

Print_ISBN

0-8186-3552-5

Type

conf

DOI

10.1109/CIC.1992.269532

Filename

269532