Lesion

Lesion is an Optimas/Optimate routine which measures projected diameters along a user defined section of a blood vessel. The blood vessel is defined by the user by locating the vessel edges in the region of interest using Optimas' "Create Line" tool. Vessel diameters are measured by determining the distance between vessel edges A and B. These measurments are performed, at user adjustable intervals along the blood vessel, in a "Point to Point" mode (connects each point on edge A with it's mate on edge B) or a "Minimum Distance" mode (connects each point on edge A with the nearest point on edge B). Diameter measurments are taken at a user adjustable interval along the blood vessel.

The measurments taken by Lesion are accurate because they are calibrated against a feature in the image with a known linear dimension.

The blood vessel diameters are displayed graphically and can be saved to a tab-delimited ASCII data file suitable for use with EXCEL and many other software packages. The data file has columns for "Film Date", "Vessel", "Min. Diameter", "Max. Diameter", "Diameter Std. Dev.", "Stenosis (%)", and "Mode".