US 12,496,467 B2
Removing artefacts in radiotherapy imaging
Abdul Sayeed, Crawley (GB)
Assigned to Elekta Limited, Crawley (GB)
Filed by Elekta Limited, Crawley (GB)
Filed on Feb. 9, 2023, as Appl. No. 18/166,837.
Claims priority of application No. 2202522 (GB), filed on Feb. 24, 2022.
Prior Publication US 2023/0271033 A1, Aug. 31, 2023
Int. Cl. A61N 5/10 (2006.01); A61B 6/00 (2024.01)
CPC A61N 5/1078 (2013.01) [A61B 6/482 (2013.01); A61B 6/5258 (2013.01); A61N 5/1048 (2013.01); A61N 2005/1091 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A radiotherapy device comprising:
a radiation source, wherein the radiation source is configured to deliver kilovolt (kV) or megavolt (MV) radiation;
a detector configured to detect the kV or MV radiation to generate a plurality of images of a subject located between the radiation source and the detector; and
a controller configured to:
detect an erroneous pixel in an image of the plurality of images; and
generate an averaged image, wherein to generate an averaged image comprises:
generating each pixel of the averaged image by taking an average of two or more respective pixels in two or more corresponding locations of one or more of the plurality of images, wherein generating a pixel of the averaged image which is in a corresponding location to the erroneous pixel comprises excluding the erroneous pixel from the taking of the average, wherein the image comprises a row of erroneous pixels including the erroneous pixel, and wherein the controller is configured to detect the row of erroneous pixels in the image of the plurality of images.