Determining a Thickness of a Layer of Fat of an Organism

• US 20100168551A1
• Filed: 11/09/2007
• Published: 07/01/2010
• Est. Priority Date: 11/14/2006
• Status: Abandoned Application

• Current Assignee: Medizinische Universitaet Graz
• Original Assignee: Medizinische Universitat Graz
• Inventors: Möller, Reinhard
• Application Number:
  US12/514,728
• Publication Number:
  US 20100168551A1
• Time in Patent Office: Days
• US Class Current: 600/407
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• 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 5/4872 Body fat
• CPC Class Codes: G01B 11/06 for measuring thickness ; e.g. of sheet material thickness measurement by thermal means G01B21/085

Abstract

An apparatus for determining a thickness of a layer of fat of an organism, the apparatus comprising a plurality of electromagnetic radiation sources adapted for illuminating the layer of fat with a plurality of pulses of electromagnetic radiation, at least one electromagnetic radiation detector adapted for detecting detection signals indicative of the pulses of electromagnetic radiation after transmission through the layer of fat, and a determining unit adapted for determining a plurality of values of the thickness of the layer of fat based on an analysis of a plurality of ratios between the detection signals, wherein only those values are used for calculating an average thickness of the layer of fat which values result in deviations from the average thickness of less than a predetermined threshold value.

Claims

1. An apparatus for determining a thickness of a layer of fat of an organism, the apparatus comprising

a plurality of electromagnetic radiation sources adapted for illuminating the layer of fat with a plurality of pulses of electromagnetic radiation;

at least one electromagnetic radiation detector adapted for detecting detection signals representing the pulses of electromagnetic radiation after transmission through the layer of fat;

a determining unit adapted for determining a plurality of values of the thickness of the layer of fat based on an analysis of a plurality of ratios between the detection signals, wherein only those values are used for calculating an average thickness of the layer of fat which values result in deviations from the average thickness of less than a predetermined threshold value.

2. The apparatus of claim 1,

wherein the determining unit is adapted for determining the plurality of values of the thickness of the layer of fat based on a correlation function correlating the plurality of ratios between the detection signals with the plurality of values of the thickness of the layer.

3. The apparatus of claim 2,

wherein the correlation function is a polynomial function, particularly a polynomial function of third order.

5. The apparatus of claim 1,

wherein the determining unit is adapted for calculating the average thickness of the layer of fat using detection signals during the pulses and using detection signals in time intervals between the pulses.

6. The apparatus of claim 1,

wherein the determining unit is adapted for performing an underground correction by subtracting an arithmetic average of detection signals in time intervals before and after a pulse from a detection signal during the pulse.

7. The apparatus of claim 1,

wherein the plurality of electromagnetic radiation sources are adapted for illuminating the layer of fat with a plurality of repetitive sequences of the plurality of pulses of electromagnetic radiation;

and

wherein the determining unit is adapted for adding corresponding detection signals of the plurality of repetitive sequences.

8. The apparatus of claim 1,

comprising a quality estimation unit adapted for estimating a quality of the determination of the thickness of the layer of fat based on an amount of values used for calculating the average thickness of the layer of fat.

9. The apparatus of claim 8,

wherein the quality estimation unit is adapted for outputting the estimated quality perceivable for a user.

11. The apparatus of claim 1,

wherein the plurality of electromagnetic radiation sources and the at least one electromagnetic radiation detector are located in a casing in a manner that the plurality of electromagnetic radiation sources and the at least one electromagnetic radiation detector are positionable directly onto a body portion of the organism at which the thickness of the layer of fat is to be determined.

13. The apparatus of claim 1,

wherein the apparatus is adapted for determining the thickness of the layer of fat at a plurality of body portions of the organism and comprises a diagnosis unit adapted for deriving a medical diagnosis regarding at least one illness based on a relationship of the thickness of the layer of fat at the plurality of body portions of the organism.

14. The apparatus of claim 1,

wherein the number of at least one of the plurality of electromagnetic radiation sources illuminating the layer of fat differs for different ones of the plurality of pulses of electromagnetic radiation, wherein the number is the larger the larger the distance of the respective at least one of the plurality of electromagnetic radiation sources from the at least one electromagnetic radiation detector is.

15. The apparatus of claim 1,

wherein an illumination intensity of at least one of the plurality of electromagnetic radiation sources illuminating the layer of fat differs for different ones of the plurality of pulses of electromagnetic radiation, wherein the illumination intensity is the larger the larger the distance of the respective at least one of the plurality of electromagnetic radiation sources from the at least one electromagnetic radiation detector is.

16. The apparatus of claim 1,

adapted for determining the thickness of a layer of subcutaneous fat of the organism.

17. The apparatus of claim 1,

adapted as a portable device, particularly as one of the group consisting of a mobile phone, a personal digital assistant, an MP3 player, a gaming device, an audio player, a DVD player, a CD player, a harddisk-based media player, a medical communication system, and a body-worn device.

18. The apparatus of claim 1,

adapted as a measuring head being connectable to a computer, particularly via a USB interface.

19. The apparatus of claim 1,

wherein the plurality of electromagnetic radiation sources are adapted for illuminating the layer of fat with the plurality of pulses of electromagnetic radiation in an optical wavelength range, particularly in a wavelength range between 635 nm and 670 nm, more particularly at a wavelength of 660 nm.

4. (canceled)

10. (canceled)

12. (canceled)

20. A method of determining a thickness of a layer of fat of an organism, the method comprising

illuminating the layer of fat with a plurality of pulses of electromagnetic radiation;

detecting detection signals representing the pulses of electromagnetic radiation after transmission through the layer of fat;

determining a plurality of values of the thickness of the layer of fat based on an analysis of a plurality of ratios between the detection signals, wherein only those values are used for calculating an average thickness of the layer of fat which values result in deviations from the average thickness of less than a predetermined threshold value.

21. The method of claim 20,

comprising providing average thicknesses of the layer of fat measured at a plurality of body portions to a computer-implemented system;

receiving information regarding specific risks for diseases from the computer-implemented system based on a comparison of the provided average thicknesses with values of a number of probands stored on the computer-implemented system.

22. The method of claim 21,

wherein the information is received from the computer-implemented system via an Internet platform.

23. A program element, which, when being executed by a processor, is adapted to control or carry out a method of claim 20 of determining a thickness of a layer of fat of an organism.

24. A computer-readable medium, in which a computer program is stored which, when being executed by a processor, is adapted to control or carry out a method of claim 20 of determining a thickness of a layer of fat of an organism.