US 11,744,535 B2
Automated population based assessment of contrast absorption phases
Giovanni John Jacques Palma, Chaville (FR); and Arkadiusz Sitek, Ashland, MA (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Mar. 23, 2021, as Appl. No. 17/209,749.
Prior Publication US 2022/0304641 A1, Sep. 29, 2022
Int. Cl. A61B 6/00 (2006.01); G06T 5/40 (2006.01); G06T 7/00 (2017.01); G16H 30/20 (2018.01); G16H 30/40 (2018.01); G16H 50/20 (2018.01); G16H 50/30 (2018.01); G16H 50/70 (2018.01)
CPC A61B 6/481 (2013.01) [G06T 5/40 (2013.01); G16H 30/20 (2018.01); G16H 30/40 (2018.01); G16H 50/20 (2018.01); G16H 50/30 (2018.01); G06T 2207/30104 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method (CIM) comprising:
receiving a contrast medium based medical image set, including a target image set, where images in the contrast medium based medical image set are created by different areas in a given image being respectively characterized by a plurality of contrast medium absorption phases;
receiving a reference set of contrast medium absorption phase probabilities;
determining, for each image in the target image set, a set of contrast medium absorption phase probabilities;
creating four sub-thresholds corresponding to the reference set, wherein the four subthreshold are named, PRE, ART, VEN and DEL, respectively;
determining one or more precision values to be assigned to the four sub-thresholds associated with an expected differences in precision between PRE, ART, VEN and DEL, wherein at least one or more precision values can be calculated by:
comparing whether the target image set against the reference set of contrast medium absorption phase probabilities has a 95% or greater probability of belonging to one of the four sub-threshold;
assigning the one or more precision values to the four sub-thresholds; and
computing a set of matching scores based on a distance value between value between the sets of contrast medium absorption phase probabilities of the images of the target image set and the reference set of contrast medium absorption phase probabilities and based on the one or more precision values belonging to the four sub-thresholds.