Assessing peripheral vascular disease from a thermal image
First Claim
1. A computer implemented method for assessing peripheral vascular disease from a thermal image, the method comprising:
- receiving a thermal image of an area of exposed skin of at least one peripheral body part of a subject of interest being monitored for peripheral vascular disease, said thermal image being acquired by a thermal imaging system, said thermal image comprising a plurality of pixels, the value of each pixel corresponding to a skin surface temperature;
analyzing said thermal image to stratify said at least one peripheral body part into a plurality of skin surface regions;
identifying skin surface temperatures for each respective skin surface region based on pixels in said thermal image associated with each region; and
determining, by a processor executing machine readable program instructions, based on temperature changes of said at least one said surface region of said peripheral body part, whether said subject has peripheral vascular disease, comprising any of;
exceeding a threshold of the average temperature from another similar said surface region, exceeding a threshold of high-order statistics of temperature from another similar surface region, a comparison of temperatures between said peripheral body part and a second similar peripheral body part of said subject, a comparison of temperatures retrieved from a database, a comparison of temperatures of a similar peripheral body part obtained at a different time, and any combinations hereof, wherein said threshold is calculated based on any of;
a histogram of temperature distributions of said skin surface regions, and a color difference of said thermal image of said skin surface region.
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Abstract
What is disclosed is a system and method for assessing peripheral vascular disease from a thermal image captured using a thermal imaging system. In one embodiment the present method involves the following. First, a thermal image is received of a region of exposed skin of a peripheral body part of a subject being monitored for PVD. The thermal image was acquired by a thermal imaging system. Pixels in the thermal image each have a corresponding temperature value. The thermal image is analyzed to stratify the peripheral body part into a plurality of skin surface regions. A skin surface temperature for each respective skin surface region is identified based on pixels in the thermal image associated with those regions. The temperatures are then extracted such that a progression of temperatures can be ascertained. A method for forecasting the progression for future times is also disclosed.
6 Citations
21 Claims
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1. A computer implemented method for assessing peripheral vascular disease from a thermal image, the method comprising:
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receiving a thermal image of an area of exposed skin of at least one peripheral body part of a subject of interest being monitored for peripheral vascular disease, said thermal image being acquired by a thermal imaging system, said thermal image comprising a plurality of pixels, the value of each pixel corresponding to a skin surface temperature; analyzing said thermal image to stratify said at least one peripheral body part into a plurality of skin surface regions; identifying skin surface temperatures for each respective skin surface region based on pixels in said thermal image associated with each region; and determining, by a processor executing machine readable program instructions, based on temperature changes of said at least one said surface region of said peripheral body part, whether said subject has peripheral vascular disease, comprising any of;
exceeding a threshold of the average temperature from another similar said surface region, exceeding a threshold of high-order statistics of temperature from another similar surface region, a comparison of temperatures between said peripheral body part and a second similar peripheral body part of said subject, a comparison of temperatures retrieved from a database, a comparison of temperatures of a similar peripheral body part obtained at a different time, and any combinations hereof, wherein said threshold is calculated based on any of;
a histogram of temperature distributions of said skin surface regions, and a color difference of said thermal image of said skin surface region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for assessing peripheral vascular disease from a thermal image, the system comprising:
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a storage device; and a processor in communication with said storage device, said processor executing machine readable instructions for performing; receiving a thermal image of an area of exposed skin of at least one peripheral body part of a subject of interest being monitored for peripheral vascular disease, said thermal image being acquired by a thermal imaging system, said thermal image comprising a plurality of pixels, the value of each pixel corresponding to a skin surface temperature; analyzing said thermal image to stratify said at least one peripheral body part into a plurality of skin surface regions; identifying skin surface temperatures for each respective skin surface region based on pixels in said thermal image associated with each region; and determining, based on temperature changes of said at least one said surface region of said peripheral body part, whether said subject has peripheral vascular disease, said determining comprising any of;
exceeding a threshold of the average temperature from another similar said surface region, exceeding a threshold of high-order statistics of temperature from another similar surface region, a comparison of temperatures between said peripheral body part and a second similar peripheral body part of said subject, a comparison of temperatures retrieved from a database, a comparison of temperatures of a similar peripheral body part obtained at a different time, and any combinations hereof, wherein said threshold is calculated based on any of;
a histogram of temperature distributions of said skin surface regions, and a color difference of said thermal image of said skin surface region. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification