VITAL TISSUE DISCRIMINATION DEVICE AND METHOD

• US 20090312644A1
• Filed: 06/10/2009
• Published: 12/17/2009
• Est. Priority Date: 06/11/2008
• Status: Abandoned Application

• Current Assignee: Tokyo Institute of Technology (National University Corporation Tokyo Institute of Technology), Sumitomo Electric Industries Limited (Sumitomo Corporation), Tokyo Medical and Dental University
• Original Assignee: Tokyo Institute of Technology (National University Corporation Tokyo Institute of Technology), Sumitomo Electric Industries Limited (Sumitomo Corporation), Tokyo Medical and Dental University
• Inventors: KOSUGI, Yukio, AKBARI, Hamed, KOJIMA, Kazuyuki, SAITOH, Tatsuhiko, TANAKA, Masato
• Application Number:
  US12/481,912
• Publication Number:
  US 20090312644A1
• Time in Patent Office: Days
• US Class Current: 600/473
• CPC Class Codes: A61B 5/0071 by measuring fluorescence emission
• 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 5/0086 using infrared radiation
• CPC Class Codes: A61B 5/726 using Wavelet transforms
• CPC Class Codes: G01N 2021/1765 Method using an image detector and processing of image signal
• CPC Class Codes: G01N 2021/178 Methods for obtaining spatial resolution of the property being measured
• CPC Class Codes: G01N 21/359 using near infrared light

Abstract

A vital tissue discrimination device, which includes infrared spectrum acquiring section (1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13 and 14) for acquiring infrared spectrum information from a vital tissue and an operating section (11) for discriminating normal from abnormal of the vital tissue based on the infrared spectrum information obtained by the infrared spectrum acquiring section, wherein the operating section (11) calculates a micro-cycle fluctuation component of the infrared spectrum information and discriminates normal from abnormal of the vital tissue based on the micro-cycle fluctuation component of the infrared spectrum information.

Claims

1. A vital tissue discrimination device, comprising:

an infrared spectrum acquiring section for acquiring infrared spectrum information from a vital tissue, and

an operating section for discriminating normal from abnormal of the vital tissue based on the infrared spectrum information obtained by the infrared spectrum acquiring section, wherein

the operating section calculates a micro-cycle fluctuation component of the infrared spectrum information, and discriminates normal from abnormal of the vital tissue based on the micro-cycle fluctuation component of the infrared spectrum information.

2. The vital tissue discrimination device according to claim 1, wherein

the infrared spectrum acquiring section comprises:

an infrared light source which can sweep the central wavelength at the infrared region, and

an infrared light detecting section having a sensitivity of the infrared region, wherein

the infrared spectrum information is obtained by applying the infrared light emitted from the infrared light source to the vital tissue and detecting the measuring light which reflects, penetrates or scatters in the vital tissue by the infrared light detecting section.

3. The vital tissue discrimination device according to claim 2, wherein

the infrared light detecting section is an image picking-up section which can detect infrared light, and

the infrared spectrum acquiring section acquires the infrared spectrum information for each picture element of the image picked-up by the image picking-up section.

4. The vital tissue discrimination device according to claim 1, wherein

the infrared spectrum information is infrared spectrum information within a wavelength range of from 1,200 to 1,320 nm.

5. The vital tissue discrimination device according to claim 1, wherein

the operating section calculates the micro-cycle fluctuation component by wavelet conversion of the infrared spectrum information.

6. The vital tissue discrimination device according to claim 1, wherein

the operating section further comprises a spectral pattern comparing part which compares spectral pattern of the infrared spectrum information with a standard spectral pattern of a normal tissue memorized in advance, and

the operating section discriminates normal from abnormal of the vital tissue based on the result of comparing micro-cycle fluctuation component of the infrared spectrum information with the spectral pattern comparing part.

7. The vital tissue discrimination device according to claim 6, wherein

the spectral pattern comparing part compares the spectral pattern with the standard spectral pattern based on the correlation coefficient.

8. The vital tissue discrimination device according to claim 1, wherein

the operating section discriminates normal from abnormal of the vital tissue using a learning classification type algorithm.

9. The vital tissue discrimination device according to claim 1, wherein

the vital tissue is a living, that is, in vivo tissue.

10. The vital tissue discrimination device according to claim 1, wherein

the infrared spectrum acquiring section acquires infrared spectrum information on a vital tissue in the living body by an endoscope.

11. The vital tissue discrimination device according to claim 1, wherein

the vital tissue is a tissue cut out from the living body, that is, an in vitro tissue.

12. The vital tissue discrimination device according to claim 1, wherein

the vital tissue identified as abnormal by the operating section is a tumor of digestive system.

13. A vital tissue discrimination method for discriminating normal from abnormal of the vital tissue based on the infrared spectrum information from the vital tissue obtained by an infrared spectrum acquiring section, the method comprising:

a step for calculating a micro-cycle fluctuation component of the infrared spectrum information, and

a step for discriminating normal from abnormal of the vital tissue based on the micro-cycle fluctuation component of the infrared spectrum information.

14. A vital tissue discrimination method for discriminating normal from abnormal of the vital tissue based on the infrared spectrum information from the vital tissue obtained by an infrared spectrum acquiring section, the method comprising:

a step for calculating a micro-cycle fluctuation component of the infrared spectrum information,

a step for comparing spectral patterns, which compares spectral pattern of the infrared spectrum information with a standard spectral pattern of a normal tissue memorized in advance, and

a step for discriminating normal from abnormal of the vital tissue based on the result of comparing micro-cycle fluctuation component of the infrared spectrum information with the spectral pattern comparing step.