Patent ID: 9232927
Filing Date: 2016-01-12
CPC Classification: A61B,G06T

Claim Text:
1. A method of reconstruction from a multi-energy CT scan, comprising a first data collecting step, a second data collecting step, a multi-energy correction step and a multi-energy image reconstruction step, wherein the first data collecting step comprises: setting a first-class object comprising a first material and a second material as an object to be scanned; performing data collection at a first-class voltage with a method for collecting multi-energy CT data, to collect n sets of first-class scan data the second data collecting step comprises: scanning a double-cylinder correction phantom in n projection angles respectively, at the respective voltages of the m sampling points with the CT scanner, to obtain m groups of data, each group comprising n sets of second-class scan data, wherein the double-cylinder correction phantom comprises two materials to be discriminated in the first-class object, one cylinder comprises a first material, and the other cylinder comprises a second material; the multi-energy correction step comprises: reconstructing and correcting m second-class images from the m groups of data each group comprising n sets of second-class scan data, wherein each group including n sets of second-class scan data, corresponds to one of the second-class images; obtaining third-class images of the first material and third-class images of the second material according to the position and size of the first material and the second material in the double-cylinder correction phantom; and calculating respective combination coefficients M the multi-energy image reconstruction step comprises: determining the image vectors X wherein C P determining the image vectors X displaying the reconstructed image on a display unit.