Living body light measuring device
First Claim
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1. A living body light measuring device comprising:
- a light irradiating source for irradiating light into a living body which is a subject of study;
a light condensing detector for condensing living body passage light for detection when light irradiated by said light irradiating source passes through the interior of said living body,a stimulus device wherein a stimulus is intermittently provided to said subject;
a noise detector from which on the basis of detected noise associated with body movement of said subject in said living body passage light detected, a direction is given to the stimulus device to control a stop and start of the stimulus applied and to control a number of times of said stimulus to be given to said subject which has been programmed in advance and said stimulus application is changed based on the movement of the subject.
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Abstract
There has been no device for measuring changes in Hb concentrations associated with activities of the cerebral function of an infant or subject prone to movement during measurement. Removing and reducing any influences of body movement is needed. In the present invention, light is irradiated on the subject'"'"'s head, and changes in Hb concentrations associated with activities of the cerebral function are measured from scattered light which has passed through the head. From this blood circulation movement, a parameter is inputted arbitrarily to judge the body movement component, and feed-back is applied to a stimulus device for giving a stimulus to the subject.
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9 Claims
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1. A living body light measuring device comprising:
a light irradiating source for irradiating light into a living body which is a subject of study; a light condensing detector for condensing living body passage light for detection when light irradiated by said light irradiating source passes through the interior of said living body, a stimulus device wherein a stimulus is intermittently provided to said subject; a noise detector from which on the basis of detected noise associated with body movement of said subject in said living body passage light detected, a direction is given to the stimulus device to control a stop and start of the stimulus applied and to control a number of times of said stimulus to be given to said subject which has been programmed in advance and said stimulus application is changed based on the movement of the subject. - View Dependent Claims (2, 3, 4)
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5. A living body light measuring device comprising:
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a light irradiating source for irradiating light into a living body which is a subject of study; a light condensing detector for condensing living body passage light to be obtained, for detection, when light irradiated by said light irradiating source passes through the interior of said living body, a stimulus device from which a stimulus is intermittently given to said subject, and on the basis of noise associated with body movement of said subject in said living body passage light detected by said detector a number of times of a stimulus to be given to said subject which has been programmed in advance will be changed. - View Dependent Claims (6, 7, 8)
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9. A method for controlling the timing of sound stimulus in an optical imaging system used to image a living body of a subject under study comprising:
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setting a predetermined number of sound stimulus applications to be applied over a time period to a subject sufficient to produce a measurement signal from optical radiation applied to the subject which is directed into the subject'"'"'s body and detected by a detector and which shows the subject'"'"'s reaction to the sound stimulus; detecting in a detector whether said subject'"'"'s body makes a movement by detecting noise in said measurement signal; stopping the stimulus if body movement noise is detected in the measurement signal by sending a discontinue signal of the sound stimulus under execution currently; and sending a signal for setting the time of the next sound stimulus to be transmitted to a stimulus control device; wherein a time period between termination of each sound stimulus and the next sound stimulus presented is adjusted to be a minimal time period to provide a movement free measurement signal in a minimum amount of time including the predetermined number of sound stimulus applications to be applied because no useless sound stimulus time is expended when the subject is moving and is not stabilized.
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Specification