BEDSIDE OR INTRA OPERATIVE ASSESSMENT OF TISSUE DAMAGE DEPTH AND READINESS FOR RECONSTRUCTION

• US 20190320969A1
• Filed: 12/21/2017
• Published: 10/24/2019
• Est. Priority Date: 12/21/2016
• Status: Active Application

• Current Assignee: Board of Regents of the University of Michigan (University of Michigan)
• Original Assignee: Board of Regents of the University of Michigan (University of Michigan)
• Inventors: LEVI, Benjamin, BERENFELD, Omer, MORRIS, Michael D.
• Application Number:
  US16/470,678
• Publication Number:
  US 20190320969A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 2503/40 Animals
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/1075 for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer A61B8/0858 takes precedence
• CPC Class Codes: A61B 5/1079 using optical or photographic means
• CPC Class Codes: A61B 5/444 Evaluating skin marks, e.g. mole, nevi, tumour, scar
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: A61B 5/4878 Evaluating oedema
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal

Abstract

A short wave infrared (SWIR) imaging system and method of using the same is provided for assessing a tissue damage depth and/or readiness for reconstruction and/or debridement. The SWIR imaging system includes a light source for illuminating the wound or burn, an image light-registering camera system having at least one narrow-band SWIR filter to image the wound or burn and output imaging information, and a detection system for receiving the imaging information and processing the imaging information to determine a tissue damage depth and/or readiness for reconstruction and/or debridement assessment.

Claims

1. A short wave infrared (SWIR) imaging system for assessing a tissue damage depth, the SWIR imaging system comprising:

a light source for illuminating the wound or burn;

an image light registering camera system in a still or movie format in the SWIR range being within about 1000 nm and 2500 nm, the image light registering camera system configured to image the wound or burn and output imaging information; and

a detection system configured to receive the imaging information and process the imaging information to determine a tissue damage depth, the detection system configured to output a signal in response to the determined tissue damage depth.

2. The SWIR imaging system according to claim 1 wherein the light source comprises a tungsten-filament light source having a dichroic mirror.

3. The SWIR imaging system according to claim 1 wherein the image light registering camera system comprises a plurality of SWIR filters.

4. The SWIR imaging system according to claim 3 wherein the plurality of SWIR filters comprises a 1200±

10 nm filter, a 1650±

10 nm filter, and a 1940±

10 nm filter.

5. The SWIR imaging system according to claim 1 wherein the detection system averages the imaging information and outputs a de-noised and normalized image.

6. The SWIR imaging system according to claim 1, further comprising:

a mobile structure supporting the light source and the image light registering camera system in a predetermined orientation, the mobile structure being portable.

7. The SWIR imaging system according to claim 1 wherein the detection system detects area of diffuse inflammation in a dermal or epidermal architecture.

8. The SWIR imaging system according to claim 1 wherein the detection system detects area of subcutaneous edema in a dermal or epidermal architecture.

9. The SWIR imaging system according to claim 1 wherein the detection system detects area of disorganization in a dermal or epidermal architecture.

10. The SWIR imaging system according to claim 1 further comprising:

a projector system receiving the assessment from the detection system and visiblely projecting information upon the wound or burn.

11. The SWIR imaging system according to claim 10 wherein the projected information is wound or burn boundary information, area of interest, or debridement information.

12. A method of assessing a tissue damage depth and readiness for reconstruction comprising:

illuminating a wound or burn using a light source;

obtaining imaging data of the wound or burn using a camera system having at least one narrow-band SWIR filter;

outputting imaging information from the camera system indicative of the wound or burn;

processing the imaging information to determine a tissue damage depth and readiness for reconstruction; and

outputting a tissue damage depth and readiness for reconstruction assessment.

13. The method according to claim 12 wherein the illuminating a wound or burn using a light source comprises illuminating a wound or burn using a tungsten-filament light source having a dichroic mirror.

14. The method according to claim 12 wherein the obtaining imaging data of the wound or burn using a camera system having at least one narrow-band SWIR filter comprises obtaining imaging data of the wound or burn using a camera system having at a plurality of SWIR filters.

15. The method according to claim 12 wherein the obtaining imaging data of the wound or burn using a camera system having at least one pass-band SWIR filter comprises obtaining imaging data of the wound or burn using a camera system having a 1200±

10 nm filter, a 1650±

10 nm filter, and a 1940±

10 nm filter.

16. The method according to claim 12 wherein the step of illuminating a wound or burn using a light source comprises illuminating a wound or burn using a light source emitting light at or around at least one of 1200 nm, 1650 nm, and 1940 nm.

17. The method according to claim 12 wherein the processing the imaging information to determine a tissue damage depth and readiness for reconstruction comprises averaging the imaging information and outputting a de-noised and normalized image determine the tissue damage depth and readiness for reconstruction.

18. The method according to claim 12 wherein the processing the imaging information to determine a tissue damage depth and readiness for reconstruction comprises detecting an area of diffuse inflammation in a dermal or epidermal architecture.

19. The method according to claim 12 wherein the processing the imaging information to determine a tissue damage depth and readiness for reconstruction comprises detecting an area of subcutaneous edema in a dermal or epidermal architecture.

20. The method according to claim 12 wherein the processing the imaging information to determine a tissue damage depth and readiness for reconstruction comprises detecting an area of disorganization in a dermal or epidermal architecture.

21. The method according to claim 12 wherein the outputting a tissue damage depth and readiness for reconstruction assessment comprises visibly displaying the assessment directly upon the tissue.

22. A method of assessing a tissue damage depth and readiness for reconstruction comprising:

illuminating a wound or burn using a light source emitting light at or around at least one of 1200 nm, 1650 nm, and 1940 nm;

obtaining imaging data of the wound or burn using a camera system responsive to the light at or around at least one of 1200 nm, 1650 nm, and 1940 nm;

outputting imaging information from the camera system indicative of the wound or burn;

processing the imaging information to determine a tissue damage depth and readiness for reconstruction; and

outputting a tissue damage depth and readiness for reconstruction assessment.

23. The method according to claim 22 wherein the step of illuminating a wound or burn using a light source emitting light at or around at least one of 1200 nm, 1650 nm, and 1940 nm comprises illuminating a wound or burn using a broadband light source having one or more filters emitting light at or around at least one of 1200 nm, 1650 nm, and 1940 nm.

24. The method according to claim 22 wherein the step of illuminating a wound or burn using a light source emitting light at or around at least one of 1200 nm, 1650 nm, and 1940 nm comprises illuminating a wound or burn using a narrowband light source emitting light at or around at least one of 1200 nm, 1650 nm, and 1940 nm.