Patent Document ID: 9892527
Application ID: 14886745
Patent Status: 1

Claim One:
1. A method of reconstructing an image, comprising: receiving low dose X-ray computed tomography (CT) data; calculating an initial reconstruction image based on the low dose X-ray CT data using a back projection filtration (BPF) algorithm; calculating differentiated backprojection (DBP) data based on the low dose X-ray CT data using the BPF algorithm; transforming the initial reconstruction image into a transformed reconstruction image based on a projection on a PI-line that connects two points of a helical trajectory vector in the low dose X-ray CT data; performing a Hilbert transform on the transformed reconstruction image; comparing the Hilbert transformed reconstruction image and the DBP data; determining whether the Hilbert transformed reconstruction image converges with the initial reconstruction image based on the comparison; and responsive to determining that the Hilbert transformed reconstruction image does not converge with the initial reconstruction image, iteratively updating the Hilbert transformed reconstruction image until the updated Hilbert transformed reconstruction image converges with the initial reconstruction image.