Methods and apparatus for specimen characterization using hyperspectral imaging

Patent metadata

Field	Value
Publication number	US-11333553-B2
Application number	US-201816632323-A
Country	US
Kind code	B2
Filing date	Jul 16, 2018
Priority date	Jul 19, 2017
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

An apparatus for characterizing a specimen and/or specimen container. The characterization apparatus includes an imaging location configured to receive a specimen container containing a specimen, a light source configured to provide lighting of the imaging location, and a hyperspectral image capture device. The hyperspectral image capture device is configured to generate and capture a spectrally-resolved image of a small portion of the specimen container and specimen at a spectral image capture device. The spectrally-resolved image data received at the spectral image capture device is processed by a computer to determine at least one of: segmentation of at least one of the specimen and/or specimen container, and determination of a presence or absence of an interferent, such as hemolysis, icterus, or lipemia. Methods of imaging a specimen and/or specimen container, and specimen testing apparatus including a characterization apparatus are described, as are other aspects.

First claim

What is claimed is:

1. A characterization apparatus, comprising:
an imaging location configured to receive a specimen container containing a specimen;
a light source configured to provide lighting of the imaging location;
a hyperspectral image capture device comprising a spectral image capture device, the hyperspectral image capture device configured to generate and capture a spectrally-resolved image of a portion of the specimen container and specimen at the spectral image capture device; and
a computer configured and operable to process the spectrally-resolved image received at the spectral image capture device and determine at least one of:
segmentation of the specimen,
segmentation of the specimen container and the specimen, and
a presence or absence of an interferent.

2. The characterization apparatus of claim 1 , wherein the light source comprises a broad band light source of at least 100 nm bandwidth within a range of between 300 nm and 2,000 nm.

3. The characterization apparatus of claim 1 , wherein the light source comprises multiple spectral bands having discreet wavelength ranges within a range of between 300 nm and 2,000 nm.

4. The characterization apparatus of claim 1 , wherein the light source comprises one or more light panel assemblies including a plurality of white light sources.

5. The characterization apparatus of claim 1 , wherein the light source comprises one or more light panel assemblies including a combination of a white light source and a near infrared source or a mid-infrared source.

6. The characterization apparatus of claim 5 , wherein each one of the one or more light panel assemblies comprise:
a mounting frame,
a light guide; and
a plurality of light elements are configured to emit light into the light guide and provide broadband or multi-band light emission from a front surface.

7. The characterization apparatus of claim 5 , wherein the one or more light panel assemblies are located on a back side of the imaging location opposite from the hyperspectral image capture device and is configured to provide back lighting of the specimen container and specimen.

8. The characterization apparatus of claim 5 , wherein the one or more light panel assemblies are located on a front side of the imaging location on a same side as the hyperspectral image capture device and is configured to provide front lighting of the specimen container and specimen.

9. The characterization apparatus of claim 1 , wherein the hyperspectral image capture device comprises a lens and slit aperture assembly configured to project an image of the portion of the specimen container and specimen onto a spectrally-resolving element.

10. The characterization apparatus of claim 9 , wherein spectrally-resolving element comprises a prism.

11. The characterization apparatus of claim 9 , wherein spectrally-resolving element comprises a diffraction grating.

12. The characterization apparatus of claim 9 , wherein spectrally-resolving element comprises a linear band pass filter.

13. The characterization apparatus of claim 1 , wherein the hyperspectral image capture device comprises a spectral image capture device configured to capture the spectrally-resolved image wherein a length of the spectral image capture device in a direction associated with a wide dimension of a slit aperture of the hyperspectral image capture device is greater than a width of the spectral image capture device in a direction associated with a narrow dimension of the slit aperture.

14. The characterization apparatus of claim 1 , wherein the hyperspectral image capture device comprises a spectral image capture device configured to capture the spectrally-resolved image, the spectral image capture device comprises a spectral resolution of at least 100 pixels in a Y dimension and a Z dimension, wherein the Y dimension is a spectral dimension, and the Z dimension is a spatial dimension.

15. The characterization apparatus of claim 1 , wherein the hyperspectral image capture device comprises:
a slit aperture in a wall structure having a wide dimension L aligned with a height dimension of the specimen container, and a narrow dimension W aligned with a width dimension across the specimen container, wherein L>W.

16. The characterization apparatus of claim 15 , wherein the hyperspectral image capture device comprises:
a lens and the slit aperture assembly configured to project an image of an imaged region of the specimen container and specimen onto a spectrally-resolving element.

17. The characterization apparatus of claim 1 , wherein the hyperspectral image capture device comprises:
a slit aperture in a wall structure having a wide dimension L aligned with a height of the specimen container, and a narrow dimension W aligned with a width dimension across the specimen container, wherein L>W;
a first lens including a focal length configured to focus an image of a first surface of the specimen container and specimen onto a plane of the slit aperture;
a spectrally-resolving element;
a spectral image capture device; and
a lens system including a second lens and a third lens, wherein the third lens and spectrally-resolving element are configured to project the spectrally-resolved image of the portion of the specimen container and specimen onto the spectral image capture device.

18. The characterization apparatus of claim 1 , wherein the computer is configured to determine one or more of:
hemolysis,
icterus,
lipemia, and
normality the specimen, based upon the spectrally-resolved image.

19. The characterization apparatus of claim 1 , wherein the computer is configured to determine segmentation of at least one of the specimen and the specimen container based upon the spectrally-resolved image.

20. The characterization apparatus of claim 19 , wherein segmentation of the least one of the specimen and the specimen container includes determining a vertical location of one or more of:
a serum or plasma portion in the specimen;
a settled blood portion of the specimen;
a gel separator; and
air in the specimen container; and
a cap.

21. The characterization apparatus of claim 20 , wherein segmentation of the specimen includes determining a vertical location of one or more of:
a tube-cap interface,
a liquid-air interface,
a serum-blood interface,
a serum-gel interface, and
a blood-gel interface.

22. A specimen testing apparatus, comprising:
a track;
a carrier moveable on the track and configured to support a specimen container containing a specimen; and
a characterization apparatus located on the track, the characterization apparatus comprising:
an imaging location configured to receive the specimen container containing the specimen carried by the carrier,
a light source configured to provide lighting of the imaging location,
a hyperspectral image capture device including a spectral image capture device configured to generate and capture a spectrally-resolved image of a portion of the specimen container and specimen at the imaging location, and
a computer configured and operable to process the spectrally-resolved image received at the spectral image capture device and determine at least one of:
segmentation of the specimen,
segmentation of the specimen container and the specimen, and
a presence or absence of an interferent.

23. A method of characterizing a specimen container and/or a specimen, comprising:
providing the specimen container containing the specimen at an

Assignees

• Siemens Healthcare Diagnostics Inc

Inventors

• Wissmann Patrick
• Pollack Benjamin S

Classifications

• G01N2201/0634

  Diffuse illumination · CPC title

• G01N2201/0627

  Use of several LED's for spectral resolution · CPC title

• G01N2035/0493

  Locating samples; identifying different tube sizes · CPC title

• G01N21/359

  using near infrared light · CPC title

• G01N21/31 Primary

  Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} · CPC title