PROCEDES, SYSTEMES ET PRODUITS-PROGRAMMES INFORMATIQUES PERMETTANT D'ESTIMER UN RAYONNEMENT DIFFUSE DANS DES IMAGES TOMOGRAPHIQUES INFORMATISEES A FAISCEAU CONIQUE ET ANALOGUES
VARIAN MEDICAL SYSTEMS, INC.; INC.;VARIAN MEDICAL SYSTEMS;VARIAN MEDICAL SYSTEMS INTERNATIONAL AG
发明人:
VIRSHUP, GARY,SEPPI, EDWARD,SHAPIRO, EDWARD,STAR-LACK, JOSH,CHELL, ERIK, WILLIAM,SURI, RONALD
申请号：
EP07799497
公开号：
EP2049887A4
申请日:
2007.07.11
申请国别(地区):
EP
年份:
2014
代理人:
摘要：
Disclosed are imaging systems, methods, and computer program products that generate estimates of scattered radiation in tomographic imaging systems, such as cone-beam computerized tomography (CBCT) systems, and the like. In an exemplary embodiment, a first group of projections is taken of an object with the radiation covering a wide band of the object, and a second group of projections is taken of the object with the radiation covering a narrower band of the object. The projections of the second group cover less of the object, but have less scattered radiation. The scattered radiation within the narrower band may be estimated from differences between projections from the first and second groups, or from representations thereof.
