Patent ID: 11884959
Assignee: BD KIESTRA B. V.
Field: Measurement (Instruments)
Classification: CPC C  G | IPC C  G

Claim 17:
18. A system for antibiotic susceptibility testing comprising:
an image sensor configured to capture images of a culture plate on which is disposed culture media with a plurality of antibiotic disks disposed thereon, wherein the culture plate is inoculated with a biological sample when the culture plate is within a field of view of the image sensor, the image sensor generating first image data and second image data, the first image data and second image data respectively representing first and second captured images of the culture plate including the plurality of antibiotic disks, the first and second captured images taken at different times and wherein the first image data serves as a pre-growth reference;
a processor and a memory, the processor configured to receive the first image data and second image data and access the memory, the memory storing a distance map; and
wherein the processor is configured to:
identify a no-growth region adjacent the antibiotic disk and a growth region further removed from the antibiotic disk relative to no-growth region;
obtain a polar transform of contrast information obtained from a comparison of the first and second captured images whereby an image of the antibiotic disk is converted into a first light band having a first intensity, an image of the no-growth region is converted to a second light band having a second light intensity; and an image of the growth region is converted to a third light band having a third light intensity wherein the second intensity is a lower than the first intensity and the third intensity is greater than the second intensity but less than the first intensity;
form the distance map from intensity values in the first, second, and third light bands; and
determine a minimum inhibitory distance from the distance map.