title: Comparison of observer and videodensitometric measurements of simulated coronary artery stenoses.
abstract: To test the applicability of an automated vessel measurement technique to coronary arteriography, a videodensitometric method with caliper measurements on digital subtraction images of a moving coronary artery phantom was compared. Percent diameter stenosis was determined by both methods, revealing a twofold improvement in reproducibility with the videodensitometric method, with percent stenosis being determined within +/- 10% for two different iodine concentrations injected during continuous flow into the simulated coronary arteries. Absolute diameters were also measured by the videodensitometric method, showing a high degree of correlation between measured and true diameter for vessels between 0.5-3.0 mm.
authors.forename: M A
authors.initials: MA
authors.lastname: Simons
authors.forename: B V
authors.initials: BV
authors.lastname: Bastian
authors.forename: B E
authors.initials: BE
authors.lastname: Bray
authors.forename: D R
authors.initials: DR
authors.lastname: Dedrickson
mesh_terms: D002932:Cineangiography; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging; D003720:Densitometry; D006801:Humans; D008961:Models, Structural; D009068:Movement; D011856:Radiographic Image Enhancement; D013382:Subtraction Technique; D014741:Video Recording