US 12,186,113 B2
Method for evaluating an angiographic dual-energy computed tomography dataset, evaluation facility and non-transitory electronically readable data carrier
Bernhard Schmidt, Fuerth (DE); Thomas Allmendinger, Forchheim (DE); and Tristan Nowak, Erlangen (DE)
Assigned to SIEMENS HEALTHINEERS AG, Forchheim (DE)
Filed by Siemens Healthineers AG, Forchheim (DE)
Filed on Nov. 22, 2022, as Appl. No. 18/057,821.
Claims priority of application No. 10 2021 213 438.6 (DE), filed on Nov. 29, 2021.
Prior Publication US 2023/0165542 A1, Jun. 1, 2023
Int. Cl. A61B 6/03 (2006.01); A61B 6/00 (2006.01); A61B 6/42 (2024.01); A61B 6/58 (2024.01)
CPC A61B 6/032 (2013.01) [A61B 6/4241 (2013.01); A61B 6/482 (2013.01); A61B 6/582 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for evaluating an angiographic dual-energy computed tomography dataset recorded using a contrast agent comprising iodine, the angiographic dual-energy computed tomography dataset including an image vector for each pixel, the image vector being formed by a first attenuation value assigned to a high-energy spectrum and a second attenuation value assigned to a low-energy spectrum, the method comprising:
specifying a calcium base vector and an iodine base vector in a two-dimensional dual-energy space spanned by the first attenuation value as an x-axis and the second attenuation value as a y-axis, a base material decomposition being based on the two-dimensional dual-energy space;
projecting all image vectors below a straight line in the dual-energy space onto the straight line to determine a modified dual-energy computed tomography dataset, the straight line being defined by the calcium base vector;
performing the base material decomposition of the modified dual-energy computed tomography dataset to determine a calcium image dataset; and
determining a quantitative calcium score from the calcium image dataset.