Brain function measurement device, brain function measurement method, and brain function measurement program
First Claim
1. A brain function measurement device, which uses a light irradiation means that irradiates examination light toward the inside of the head of a subject, and a light receiving means that receives the examination light exiting from the head and outputs light intensity signals indicating the light intensity thereof, comprising a structural data storage unit that stores structural data indicating the head structure wherein the head is divided into multiple materials, and the various materials are further divided into multiple elements, an optical properties and hemoglobin parameters calculator that calculates optical properties of the aforementioned elements from given specified initial values, and calculates the hemoglobin parameters inside the brain of the subject based on the optical property values thereof, and an initial values calculator that calculates the aforementioned initial values;
- characterized in that the initial values calculator thereof provisionally stipulates the optical property values of the various materials under the assumption that the optical properties are uniform for each material, and takes the aforementioned initial values to be the provisional optical properties when the light intensity signal values calculated from these provisional optical properties are in a fixed range of the actually measured light intensity signal values.
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Accused Products
Abstract
In addition to irradiating examination light toward the inside of the bead of the subject and detecting the examination light reflected from the head: structural data indicating the head structure, wherein the head is divided into multiple materials and the various materials are further divided into multiple elements, are stored in a structural data storage unit set up in a specified region of memory; the optical properties of the aforementioned elements are calculated from a given specified initial value; the hemodynamics inside the brain of the subject are calculated based on the optical properties thereof, and the aforementioned initial values are taken to be the optical properties when the light intensity signal values, provisionally calculated from optical properties under the assumption that the optical properties are uniform for each of the aforementioned materials, are in a fixed range of the actually measured light intensity signal values.
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Citations
10 Claims
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1. A brain function measurement device, which uses a light irradiation means that irradiates examination light toward the inside of the head of a subject, and a light receiving means that receives the examination light exiting from the head and outputs light intensity signals indicating the light intensity thereof,
comprising a structural data storage unit that stores structural data indicating the head structure wherein the head is divided into multiple materials, and the various materials are further divided into multiple elements, an optical properties and hemoglobin parameters calculator that calculates optical properties of the aforementioned elements from given specified initial values, and calculates the hemoglobin parameters inside the brain of the subject based on the optical property values thereof, and an initial values calculator that calculates the aforementioned initial values; characterized in that the initial values calculator thereof provisionally stipulates the optical property values of the various materials under the assumption that the optical properties are uniform for each material, and takes the aforementioned initial values to be the provisional optical properties when the light intensity signal values calculated from these provisional optical properties are in a fixed range of the actually measured light intensity signal values. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A brain function measurement method comprising the steps of:
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irradiating light using light irradiation means to irradiate examination light toward the inside of the head of the subject;
receiving light using light receiving means to receive examination light exiting from the head, and to output light intensity signals that indicate the light intensity thereof;
storing structural data via storage in a structural data storage unit set up in a specified region of memory structural data indicating the head structure wherein the head is divided into multiple materials, and then the various materials are further divided into multiple elements;
calculating the optical properties of the various aforementioned elements from given specified initial values, and calculating the hemoglobin parameters in the brain of the subject based on the optical properties thereof; and
calculating initial values taking the aforementioned initial values to be the various optical properties when the optical intensities calculated from the optical properties, provisionally stipulated under the assumption that the optical properties are uniform for each material, are in a fixed range of the actually measured light intensity signal values. - View Dependent Claims (8)
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9. A brain function measurement program, which uses a light irradiation means that irradiates examination light toward the inside of the head of the subject, and a light receiving means that receives the examination light exiting from the head and outputs light intensity signals indicating the light intensity thereof, characterized in that a computer manifests the functions of:
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a structural data storage unit that stores structural data indicating the head structure wherein the head is divided into multiple materials, and the various materials are further divided into multiple elements;
an optical properties and hemoglobin parameters calculator that calculates optical properties of the aforementioned elements from given specified initial values, and calculates the hemoglobin parameters inside the brain of the subject based on the optical properties thereof, and an initial values calculator that provisionally stipulates the optical properties of the various materials under the assumption that the optical properties are uniform for each material, and that takes the aforementioned initial values to be the provisional optical properties when the light intensity signal values calculated from these provisional optical properties are in a fixed range of the actually measured light intensity signal values. - View Dependent Claims (10)
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Specification