US 11,875,434 B2
Systems and methods for correcting projection images in computed tomography image reconstruction
Hongcheng Yang, Shanghai (CN); Jianwei Zhu, Shanghai (CN); Haining Sun, Shanghai (CN); and Jonathan Maltz, Houston, TX (US)
Assigned to SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed by SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed on Dec. 5, 2022, as Appl. No. 18/062,001.
Application 18/062,001 is a continuation of application No. 17/158,030, filed on Jan. 26, 2021, granted, now 11,521,336.
Application 17/158,030 is a continuation of application No. 16/252,826, filed on Jan. 21, 2019, granted, now 10,922,856, issued on Feb. 16, 2021.
Application 16/252,826 is a continuation of application No. PCT/CN2018/087884, filed on May 22, 2018.
Application PCT/CN2018/087884 is a continuation in part of application No. PCT/CN2017/110032, filed on Nov. 8, 2017.
Claims priority of application No. 201811306943.1 (CN), filed on Nov. 5, 2018.
Prior Publication US 2023/0100281 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 11/00 (2006.01)
CPC G06T 11/008 (2013.01) [G06T 11/005 (2013.01); G06T 2211/424 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a storage device storing a set of instructions; and
at least one processor in communication with the storage device, wherein when executing the set of instructions, the at least one processor is configured to cause the system to:
obtain a plurality of projection images of a subject, the plurality of projection images being generated according to scan data acquired by a CT scanner at a plurality of gantry angles, each of the plurality of projection images corresponding to one of the plurality of gantry angles; and
correct the plurality of projection images by performing one or more iterations, an iteration of the one or more iterations including:
correcting the plurality of projection images in the iteration to generate a plurality of corrected projection images;
determining whether the plurality of corrected projection images in the iteration satisfy a condition; and
in response to determining that the plurality of corrected projection images fail to satisfy the condition, designating the plurality of corrected projection images in the iteration as the plurality of projection images in a next iteration.