摘要:
Cerebral blood volume changes are measured to evaluate, from properties of low-frequency components of such changes and heart rate changes calculated by analysis, a distribution of cerebral blood vessel hardness and its change over time to thereby estimate and display diseased and dangerous portions based on the evaluation. This is attainable by a biological measurement system having a cerebral blood volume measurement unit which measures a regional cerebral blood volume of a body under test, an analyzer unit that analyzes a signal measured by the cerebral blood volume measurement unit, an extraction unit for extracting, based on an output of the analysis unit, information concerning a regional cerebral blood vessel state of the test body, and a display unit which displays a measurement result of the cerebral blood volume measurement unit, an analysis result of the analyzer unit or an extraction result of the extraction unit.
摘要:
This invention measures cerebral blood volume changes to evaluate, from properties of low-frequency components of such changes and heart rate changes calculated by analysis, a distribution of cerebral blood vessel hardness and its with-time change to thereby estimate and display diseased and dangerous portions based on the evaluation. Briefly, the above-noted object is attainable by a biological measurement system having a cerebral blood volume measurement unit which measures a regional cerebral blood volume of a body under test, an analyzer unit that analyzes a signal measured by the cerebral blood volume measurement unit, an extraction unit for extracting, based on an output of the analysis unit, information concerning a regional cerebral blood vessel state of the test body, and a display unit which displays a measurement result of the cerebral blood volume measurement unit, an analysis result of the analyzer unit or an extraction result of the extraction unit.
摘要:
A living body measurement system including a cerebral blood volume measurement unit for measuring a regional cerebral blood volume of a subject, an arterial pressure/heart rate measurement unit for measuring an arterial pressure and/or a heart rate of the subject, an analysis unit for analyzing signals measured by the cerebral blood volume measurement unit and the arterial pressure/heart rate measurement unit, an extraction unit for extracting information concerning a regional cerebral vascular state of the subject on the basis of an output of the analysis unit, and a display unit for displaying a measurement result measured by the cerebral blood volume measurement unit and/or the arterial pressure/heart rate measurement unit, an analysis result analyzed by the analysis unit, or an extraction result extracted by the extraction unit.
摘要:
An optical measurement instrument for living body that comprises: a plurality of light irradiation means for irradiating an object being tested with light; a plurality of light reception means for detecting the light that is irradiated to the object being tested and propagates inside the object being tested; and a calculation unit for calculating hemodynamics of a plurality of factors inside the object being tested from the detection signal detected by the light reception means, wherein the calculation unit comprises: a separation calculation unit for separating a plurality of signals from the detection signals; a selection unit for calculating a correlation coefficient between a plurality of the signals separated to select a signal in which a correlation coefficient is a predetermined value or greater as a noise signal; and a reconstruction calculation unit for reconfiguring the detection signal excluding the noise signal selected by the selection unit.
摘要:
A response period is determined arbitrarily. A satisfactory detecting ability may not be provided because of an artifact or the like contained in a signal. Therefore, an effective detection method and an effective display method of presenting results of detection must be developed. A series of tasks (stimuli) or a selected measurement signal is used as a reference signal, and a phase difference of any other measurement signal from the reference signal is calculated. The synchronousness of the phase of the measurement signal with the phase of the reference signal is numerically expressed. The thus obtained numerical value is statistically processed in order to numerically express a degree of reliability. Thus, a brain activity or a functional connectivity is visualized.
摘要:
A typical task assigned for measuring a brain activity signal lasts from 10 to 30 seconds. The frequency band of the Mayer wave noise signal is very close to the frequency bands of brain activity signals, a result, it is difficult to reduce the Mayer wave noise signal using a bandpass filter or a bandcut filter. Light irradiating units and light detecting units for detecting the emitted light that has been passed through or reflected within the tissue are provided. A biological signal measuring unit measures at least one of the pulsation, breathing, blood pressure, and temperature. The relationship between an optical signal obtained by the light detecting unit and a biological signal using non-linear analysis; and a computation for separating the biological noise signal from the optical signal on the basis of the obtained relationship.
摘要:
A satisfactory averaged signal can be obtained with only a small number of repetitions of measurement in the measurement of responses to a stimulus given to a living body. A low-frequency biological fluctuation is extracted and a stimulus is presented to the living body in synchronism with the phase of the extracted fluctuation.
摘要:
An optical measurement instrument for living body includes: a plurality of light irradiation means for irradiating an object being tested with light; a plurality of light reception means for detecting the light that is irradiated to the object being tested and propagates inside the object being tested; and a calculation unit for calculating hemodynamics of a plurality of factors inside the object being tested from the detection signal detected by the light reception means, wherein the calculation unit includes a separation calculation unit for separating a plurality of signals from the detection signals; a selection unit for calculating a correlation coefficient between a plurality of the signals separated to select a signal in which a correlation coefficient is a predetermined value or greater as a noise signal; and a reconstruction calculation unit for reconfiguring the detection signal excluding the noise signal selected by the selection unit.
摘要:
The efficiency of separating normal control subjects from non-normal control subjects and separating disorders from one another is improved. Plural classification models having a stratified structure are used, and areas from which measurement data used in the plural classification models are acquired differ among the classification models.
摘要:
A typical task assigned for measuring a brain activity signal lasts from 10 to 30 seconds. The frequency band of the Mayer wave noise signal is very close to the frequency bands of brain activity signals, a result, it is difficult to reduce the Mayer wave noise signal using a bandpass filter or a bandcut filter. Light irradiating units and light detecting units for detecting the emitted light that has been passed through or reflected within the tissue are provided. A biological signal measuring unit measures at least one of the pulsation, breathing, blood pressure, and temperature. The relationship between an optical signal obtained by the light detecting unit and a biological signal using non-linear analysis; and a computation for separating the biological noise signal from the optical signal on the basis of the obtained relationship.