Patent Document ID: 20090185730
Application ID: 12403017
Patent Status: 0

Claim One:
1. An image data subtraction system suitable for use in Angiography or other medical procedure to enhance vessel visualization, comprising: an imaging processor for, subtracting data representing a first mask image from data representing temporally sequential individual images of patient vessels to provide first digitally subtracted images, said sequential individual images encompassing introduction of a contrast agent; automatically processing said data representing said first digitally subtracted images to identify a first image indicating presence of said contrast agent and a second image preceding said first image, said second image being substantially exclusive of an indication of presence of said contrast agent, by determining a measure representing a net presence of contrast agent in an individual digitally subtracted image, automatically selecting said second image as a second mask image and automatically subtracting data representing said second mask image from said data representing images of said temporally sequential individual images to provide second digitally subtracted images; and a user interface for presenting said second digitally subtracted images for display while the patient is undergoing a medical procedure.