Short wave infrared bedside or intra operative assessment of wound or burn depth at dry-wet layers and readiness for reconstruction

Patent metadata

Field	Value
Publication number	US-12220244-B2
Application number	US-201716470678-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 21, 2016
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

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.

First claim

What is claimed is:

1. A short-wave infrared (SWIR) imaging system for assessing a tissue damage depth, the SWIR imaging system comprising:
a light source for illuminating a wound or burn area, the light source having a plurality of light producing devices operated at a plurality of different wavelengths in a range of 1000 nm and 2500 nm;
a light registering camera system in a still or movie format in the SWIR range being within 1000 nm and 2500 nm, the light registering camera system configured to image the wound or burn using the light source at the plurality of different wavelengths and output multi-spectral reflectance imaging information containing reflectance intensity information;
wherein the light registering camera system comprises a plurality of SWIR filters;
and
a detection system configured to receive the multi-spectral reflectance imaging information containing the reflectance intensity information and process the multi-spectral reflectance imaging information to determine a tissue damage depth at a dry-wet layers interface based on specific absorption coefficients of each of the plurality of different wavelengths, the detection system configured to correct for scattering and create an average value of the tissue damage depth using at least two of the plurality of different wavelengths and output a signal in response to the determined tissue damage depth;
a projector system receiving the assessment from the detection system and visibly projecting information upon the wound or burn;
wherein the projected information is wound or burn boundary information, area of interest, or debridement information.

2. The SWIR imaging system according to claim 1 wherein the plurality of SWIR filters comprises a 1200±10 nm filter, a 1650±10 nm filter, and a 1940±10 nm filter.

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

4. The SWIR imaging system according to claim 1 , further comprising:
a mobile structure supporting the light source and the light registering camera system in a predetermined orientation, the mobile structure being portable.

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

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

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

Assignees

• Univ Michigan Regents

Inventors

• Levi Benjamin
• Berenfeld Omer
• Morris Michael D

Classifications

• A61B2503/40

  Animals · CPC title

• A61B5/7203

  for noise prevention, reduction or removal · CPC title

• A61B5/4878

  Evaluating oedema · CPC title

• A61B5/1079

  using optical or photographic means · CPC title

• A61B5/1075

  for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer (A61B8/0858 takes precedence) · CPC title