Kabushiki Kaisha Toshiba;Toshiba Medical Systems Corporation
发明人:
Adam PETSCHKE,Gin-Chung WANG,Yu ZOU
申请号：
US15017310
公开号：
US20170224299A1
申请日:
2016.02.05
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A method and apparatus is provided to decompose spectral computed tomography (CT) projection data into material components using singles-counts and total-counts projection data. The singles-counts projection data more accurately solves the material decomposition problem, but can produce multiple results only one of which is correct. The total-counts projection data generates a unique result, but is less precise. The total-counts projection data is used to disambiguate the multiple results of the singles-counts projection data providing a unique results that is also precise. The unique and precise material decomposition can be achieved by limiting a search region for the singles-counts result to a neighborhood surrounding the total-counts result, choosing a singles-counts result that is closest to the total-counts result, choosing a singles-counts result that minimizes a total-counts cost function, or using a combined cost function that includes a singles-counts projection data and energy-integrated projection data.
