Advances in two-dimensional quantitative coronary angiographic assessment of bifurcation lesions: improved small lumen diameter detection and automatic reference vessel diameter derivation.

Aims: To validate a new two dimensional (2-D) bifurcation quantitative coronary angiography (QCA) software.

Methods And Results: In the latest edition of the Cardiovascular Angiography Analysis System (CAAS 5.9; Pie Medical Imaging, Maastricht, The Netherlands) video-densitometric information is dynamically integrated into the edge-detection algorithm of 11- and 6-segment models to reduce overestimation of small diameters.

Two-dimensional quantitative coronary angiographic models for bifurcation segmental analysis: in vitro validation of CAAS against precision manufactured plexiglas phantoms.

Background: Quantitative coronary angiography (QCA) analysis for bifurcation lesions needs to be standardized.

Objectives: In vitro validation of two models for bifurcation QCA segmental analysis.

Methods: In the latest edition of the Cardiovascular angiography analysis system (CAAS 5v8, Pie Medical Imaging, Maastricht, The Netherlands) a 6-segment model for two-dimensional coronary bifurcation analysis was implemented next to the currently available 11-segment model.

A novel dedicated quantitative coronary analysis methodology for bifurcation lesions.

Aims: To develop a novel dedicated quantitative coronary analysis (QCA) for bifurcations.

Method And Results: A dedicated software that has minimal user interaction so as to increase the QCA results reproducibility. The new CAAS 5 bifurcation software combines established algorithm for contour detection with novel ways to determine the lesion characteristics together with the angulation of the bifurcation.