Vascular tracing: a new videoangiographic algorithm.
Using a modified recursive video digital noise filter which was originally designed for commercial broadcast of noise reduced videotape, we have developed a digital processing algorithm for videoangiography. The vascular tracing algorithm traces out the entire route of a small, concentrated contrast bolus by literally "remembering" each minimum x-ray transmission (maximum contrast) seen by the video frame on a pixel by pixel basis over any amount of time recorded. High quality videoangiogram composite frames can be obtained and recorded. Large vascular segments are traced with small volumes. The additive nature of the vascular tracing image eliminates the costly and technically demanding necessity for rapid film sequences.
D000792:Angiography / Q000379:methods*; D000818:Animals; D003201:Computers; D003287:Contrast Media / Q000008:administration & dosage; D004285:Dogs; D005471:Fluoroscopy; D014743:Videotape Recording / Q000379:methods*
D003287:Contrast Media