US 12,229,924 B2
Optimum weighting of DSA mask images
Michael Manhart, Fürth (DE)
Assigned to Siemens Healthineers AG, Forchheim (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Jul. 28, 2022, as Appl. No. 17/876,104.
Claims priority of application No. 10 2021 208 272.6 (DE), filed on Jul. 30, 2021.
Prior Publication US 2023/0037260 A1, Feb. 2, 2023
Int. Cl. G06T 5/70 (2024.01); A61B 6/00 (2024.01); A61B 6/50 (2024.01); G06T 5/50 (2006.01); G06T 7/00 (2017.01)
CPC G06T 5/70 (2024.01) [A61B 6/481 (2013.01); A61B 6/504 (2013.01); A61B 6/5264 (2013.01); G06T 5/50 (2013.01); G06T 7/0016 (2013.01); G06T 2207/20182 (2013.01); G06T 2207/20224 (2013.01); G06T 2207/30104 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for generating a subtraction image for digital subtraction angiography, the method comprising:
obtaining a plurality of mask images of an object before administering a contrast agent into the object;
obtaining a map of the object after administering a contrast agent into the object;
forming a first sum image from the plurality of mask images, wherein the plurality of mask images is summed in each case multiplied by an individual weighting, wherein the individual weightings for each of the plurality of mask images are automatically determined by an optimization method; and
ascertaining the subtraction image by subtraction of the sum image from the map.