BIOLOGICAL LIGHT MEASUREMENT DEVICE AND POSITION DISPLAY METHOD OF LIGHT IRRADIATION POSITION AND LIGHT DETECTION POSITION OR MEASUREMENT CHANNEL

• US 20110176713A1
• Filed: 09/30/2009
• Published: 07/21/2011
• Est. Priority Date: 10/01/2008
• Status: Active Grant

• Current Assignee: FUJIFILM Healthcare Corp. (Fujifilm Holdings Corporation)
• Original Assignee: Hitachi Medical Corporation (Hitachi, Ltd.)
• Inventors: Asaka, Hirokazu
• Granted Patent: US 8,565,501 B2
• Time in Patent Office: Days
• US Class Current: 382/128
• 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 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/14553 specially adapted for cerebral tissue
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/6814 Head

Abstract

There is provided a biological light measurement device capable of simply displaying a light irradiation position and a light detection position or a three-dimensional position of a measurement channel without measuring the light irradiation position and the light detection position or the three-dimensional position of the measurement channel. The biological light measurement device includes a display unit, which displays a two-dimensional head image selected from the data regarding the head shape and a two-dimensional probe, and a control unit that has a coordinate transformation section, which performs coordinate transformation of the positional information regarding the two-dimensional probe set on the displayed two-dimensional head image and calculates the light irradiation position and the light detection position or the position of the measurement channel on a three-dimensional head image.

Claims

1. A biological light measurement device including a light source unit that irradiates near-infrared light, a two-dimensional probe that measures a transmitted light intensity of the near-infrared light at two-dimensional measurement points of a subject body and outputs a signal corresponding to the transmitted light intensity at each measurement point as measurement data for every measurement channel, a signal processing unit that processes the measurement data of the two-dimensional probe to be imaged, and a display unit that displays the imaged measurement data, the biological light measurement device comprising:

a storage unit that stores data regarding a head shape for display; and

a control unit having a coordinate transformation section which performs coordinate transformation of positional information of the two-dimensional probe, which is set on a two-dimensional head image selected from the data regarding the head shape, in order to calculate a light irradiation position and a light detection position on a three-dimensional head image or the position of the measurement channel.

2. The biological light measurement device according to claim 1,

wherein the display unit displays a shape corresponding to a three-dimensional probe which forms the light irradiation position and the light detection position in the two-dimensional probe or the measurement channel.

3. The biological light measurement device according to claim 1,

wherein the coordinate transformation section calculates the light irradiation position and the light detection position or the calculation position of the measurement channel by sequentially repeating coordinate transformation processing between shapes approximated on the way from the two-dimensional head image to the three-dimensional head image.

4. The biological light measurement device according to claim 3,

wherein the coordinate transformation section calculates a coordinate position of a two-dimensional probe center on a two-dimensional circle image from the center coordinate position of the probe on the two-dimensional head image, calculates a coordinate position of the probe center on a three-dimensional hemispherical surface from the coordinate position of the probe center on the two-dimensional circle image, calculates a coordinate position of a three-dimensional probe center on a three-dimensional semi-ellipsoidal surface from the coordinate position of the probe center on the three-dimensional hemispherical surface, and calculates the light irradiation position and the light detection position on the three-dimensional semi-ellipsoidal surface 2 or the position of the measurement channel from the coordinate position of the three-dimensional probe center on the three-dimensional semi-ellipsoidal surface and sets the position as the light irradiation position and the light detection position on the three-dimensional head image or the calculation position of the measurement channel.

5. The biological light measurement device according to claim 1,

wherein the display unit simultaneously displays the two-dimensional probe and a corresponding three-dimensional head image and three-dimensional probe so as to overlap the two-dimensional head image.

6. The biological light measurement device according to claim 1, further comprising:

an overlap display unit that displays a processing result of the measurement data from the two-dimensional probe on the display unit so as to overlap the light irradiation position and the light detection position on the three-dimensional head image or the calculation position of the light measurement unit in the measurement channel.

7. The biological light measurement device according to claim 3,

wherein the coordinate transformation section calculates a coordinate position of the probe center on a three-dimensional semi-ellipsoidal surface using coordinate transformation processing from the three-dimensional probe center on the three-dimensional head image when a position equivalent to the central point of the probe on the three-dimensional head image is set, calculates a coordinate position of the probe center on the three-dimensional hemispherical surface using coordinate transformation processing from the coordinate position of the three-dimensional probe center on the three-dimensional semi-ellipsoidal surface, calculates a coordinate position of the two-dimensional probe center on the two-dimensional circle image using coordinate transformation processing from the coordinate position of the probe center on the three-dimensional hemispherical surface, and calculates a position of the two-dimensional probe on the two-dimensional head image using coordinate transformation processing from the coordinate position of the probe center on the two-dimensional circle image.

8. The biological light measurement device according to claim 3,

wherein a plurality of electroencephalographic electrodes are provided in the measurement channel, and

the control unit acquires a coordinate position of each electrode on the two-dimensional circle image by performing coordinate transformation processing on a coordinate position of each electrode on the three-dimensional hemisphere, acquires a coordinate position of each electrode on the two-dimensional head image by performing coordinate transformation processing on a coordinate position of each electrode on the two-dimensional circle image, generates and displays an overlap image with the two-dimensional head image 2 using the coordinate position of each electrode on the two-dimensional head image, acquires a coordinate position of each electrode on the three-dimensional semi-ellipsoid by performing coordinate transformation processing on a coordinate position of each electrode on the three-dimensional hemisphere, acquires a coordinate position of each electrode on the three-dimensional head image by performing coordinate transformation processing on a coordinate position of each electrode on the three-dimensional semi-ellipsoid, and generates an overlap image with a shape image using the obtained coordinate position of each electrode on the three-dimensional head image and displays the overlap image on the display unit.

9. The biological light measurement device according to claim 8,

wherein the control unit displays the electroencephalographic electrode position and the biological light measurement result on the display unit so as to overlap each other, using a calculation result on each image of the three-dimensional head image, the three-dimensional semi-ellipsoidal image, the three-dimensional hemispherical image, the two-dimensional circle image, and the two-dimensional head image.

10. A position display method of a light irradiation position and a light detection position or a measurement channel in a biological light measurement device including a light source unit that irradiates near-infrared light, a two-dimensional probe that measures a transmitted light intensity at two-dimensional measurement points of a subject body and outputs a signal corresponding to the transmitted light intensity at each measurement point as measurement data for every measurement channel, a signal processing unit that processes the measurement data of the two-dimensional probe to be imaged, a storage unit that stores data regarding a head shape for display, a display unit that displays the imaged measurement data, and a control unit having a coordinate transformation section, the position display method of a light irradiation position and a light detection position or a measurement channel in a biological light measurement device comprising:

displaying a two-dimensional head image and a two-dimensional probe on the display unit;

performing coordinate transformation of positional information of the two-dimensional probe on the two-dimensional head image displayed in order to calculate a three-dimensional probe and the light irradiation position and the light detection position on a three-dimensional head image or the position of the measurement channel; and

displaying the two-dimensional probe and the corresponding three-dimensional head image and three-dimensional probe on the display unit so as to overlap the two-dimensional head image.

11. The position display method of a light irradiation position and a light detection position or a measurement channel in a biological light measurement device according to claim 10,

wherein the light irradiation position and the light detection position of the three-dimensional probe or the calculation position of the measurement channel is calculated by sequentially repeating coordinate transformation processing between shapes approximated on the way from the two-dimensional head image to the three-dimensional head image, and

a processing result of measurement data from the light measurement unit is displayed on the display unit so as to overlap the light irradiation position and the light detection position of the three-dimensional probe on the three-dimensional head image or the calculation position of the measurement channel.