Search International and National Patent Collections

1. (WO2017039651) FAST SPARSE COMPUTED TOMOGRAPHY IMAGE RECONSTRUCTION FROM FEW VIEWS

Pub. No.:    WO/2017/039651    International Application No.:    PCT/US2015/048106
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Sep 03 01:59:59 CEST 2015
IPC: G06T 11/00
Applicants: SIEMENS HEALTHCARE GMBH
Inventors: MAILHE, Boris
FLAKE, Johannes
WANG, Qiu
NADAR, Mariappan S.
Title: FAST SPARSE COMPUTED TOMOGRAPHY IMAGE RECONSTRUCTION FROM FEW VIEWS
Abstract:
A method for performing Computed Tomography (CT) reconstruction includes acquiring a sparse measurement matrix using a CT scanner and applying a reconstruction process over a number of iterations to reconstruct image data from the sparse measurement matrix. The reconstruction process performed during each respective iteration includes generating a random view subset and determining a portion of the sparse measurement matrix corresponding to the random view subset. The reconstruction process further includes performing a stochastic gradient descent on the portion of the sparse measurement matrix to yield an image, applying a proximal total variation regularization to the image, and adjusting a step size associated with the stochastic gradient descent.