摘要:
In an optical measurement system and imaging method adapted to measure in vivo information in a living body without harming the living body, light rays of a plurality of wavelengths which are modulated in intensity with a plurality of different frequencies are irradiated on a plurality of irradiation positions on the surface of a living body, and time-variable changes in living body transmitting light intensity levels corresponding to the respective wavelengths and the respective irradiation positions are measured at different positions on the surface of the living body. Light is utilized to image the results of the measurements, in which the measuring time is shortened by estimating fluctuation attributable to the living body, and the presence or absence of a change in measured signal can be decided easily by displaying an estimation signal and a measured signal at a time.
摘要:
An input instrument for a living body, using an optical measurement system for the living body, includes first and second light incident units arranged on a head of a living body, and first and second light detectors which are paired with the first and the second light incident units respectively, and which are provided to collect light which passes through the living body based on the light irradiated onto the head of the living body by the light incident means. Measurement signals are obtained by measuring a plurality of regions of the living body by the first and the second light incident units, the first and the second light detectors, and characteristic parameters of the signals of an arbitrary time interval of the measured signals are calculated.
摘要:
Optical measurement that is optimum for improving spatial resolution is accomplished by making it possible to estimate a physical quantity of an object substance to be measured at any point on a subject. When any position to be evaluated, in an image shown in a window 1-1, is pointed and selected a mouse pointer 1-4, the value of the concentration or its change of the object substance at the point is displayed in the display area 1-7 of a window 1-3. The drawings represents an example in which one position is specified and there are two object substances to be measured. The value of the concentration or its change of each object substance to be measured is separately displayed.
摘要:
Disclosed herein is an amusement system that can be used and enjoyed by different persons without using the brain continuously and with little feeling of fatigue and which permits setting a probe at any spot on the head of the subject. The amusement system includes irradiators for irradiating the subject with light, light detectors for detection of the light that has been emitted from said irradiator and which has propagated through the living body, signal processors for processing the signal of light intensity detected by said detector and display units that show the processing results from the signal processor. The range of display of a change in intensity of said transmitted light according to the results of a test task carried out on said living body.
摘要:
A mass spectrometer includes a sample supplier which supplies a sample solution, the sample solution including a solvent, ions, and a solute, the solute being a sample to be analyzed, an ion converter, disposed after the sample supplier, which converts the ions in the sample solution into gaseous ions, an ion source, disposed after the ion converter, which ionizes the sample in the sample solution, thereby producing sample ions, a mass analyzer which analyzes masses of the sample ions produced by the ion source, and an ion blocking electrode which prevents the gaseous ions produced by the ion converter from reaching the ion source, thereby preventing the mass analyzer from analyzing masses of the gaseous ions produced by the ion converter.
摘要:
A mass spectrometric apparatus includes a device for supplying a sample solution to an outlet, the sample solution including a solvent and a solute, a first ionization device for receiving the sample solution from the outlet and electrospraying the received sample solution, thereby ionizing at least a portion of the received sample solution, a second ionization device for receiving at least a portion of the electrosprayed sample solution produced by the first ionization device and ionizing at least a portion of the received electrospayed sample solution, thereby producing ions, and a mass spectrometric device for receiving at least some of the ions produced by the second ionization device and analyzing masses of the received ions.
摘要:
A method in which cutting of small droplets, neutral particles or photons through to a slit provided between a differential pumping portion and a mass analysis portion is combined with slight deflection of ions just before introduction of the ions into the mass analysis portion so that noises are greatly reduced without reduction of signals to thereby improve the signal-to-noise ratio which is an index of detecting sensitivity or lower limit.
摘要:
In a mass spectrometer using a sonic spray ion source, a technique of controlling the density of droplets in a nebulized sample solution which is passed into a mass spectrometer at high vacuum to an appropriate value to thereby reduce analysis noises is disclosed. A sample solution in a sample solution injection unit 1 is introduced into a capillary 2 disposed in an ion source 6. A gas is introduced from a gas supply unit 4 by way of a gas pipe 5 into the ion source 6 and is caused to flow along the outer circumferential surface at the top end of the capillary 2 and is jetted out from the orifice 3 as a gas flow into atmospheric air. The sample solution jetted from the top end of the capillary 2 is ionized by the gas flow in the atmospheric air. Fine droplets or ions formed by the sonic spray method are collide against a diffuser 7, droplets and ions reduced for the density by the diffusion pass through the holes 8 disposed in the diffuser 7, and pass from the sample orifice 10 into a mass spectrometer 11 and mass analyzed. Provision of the diffuser 7 can suppress generation of analysis noises caused by the clustering phenomenon resulting from introduction of droplets or ions at high density into the mass spectrometer 11, thereby enabling to conduct analysis at high S/N ratio.
摘要:
A mass spectrometer comprising a capillary electrophoresis region for separating a solution containing molecules of sample by capillary electrophoresis in a capillary, a nebulization region for nebulizing the solution containing molecules of the sample under an atmospheric pressure from the end of the capillary and forming liquid droplets of the solution containing the molecules of the sample, a vaporization region for vaporizing the liquid droplets under an atmospheric pressure to form gaseous molecules of the sample, a chemical ionization region for forming ions relevant to the molecules of the sample under the atmospheric pressure or the reduced pressure by a chemical reaction between the ions attributable to the gaseous molecules present in the atmosphere and the gaseous molecules of the sample, and a vacuum region having a sample aperture for introducing the ions formed by the chemical ionization means and incorporating a mass analysis region for mass analysis of ions introduced from the sample aperture. The mass spectrometer is combined with the capillary electrophoresis apparatus and is particularly suitable to formation and mass analysis of ions relevant to the neutral molecules of the sample.
摘要:
Light rays of a plurality of wavelengths which are modulated in intensity with a plurality of different frequencies are irradiated on a plurality of irradiation positions on the surface of a living body, and time-variable changes in living body transmitting light intensity levels corresponding to the respective wavelengths and the respective irradiation positions are measured at different positions on the surface Changes in concentration values of absorbers are determined from the living body transmitting light intensity levels and a measuring point is set on a perpendicular extending through an intermediate point between the incident point and each detection point to image a function of the living body. The measuring time is shortened by estimating fluctuation attributable to the living body, and a local change in hemodynamic movement can be measured by detecting light rays transmitting through the interior of the living body by light detection at two different sites (equidistant from the light incident point) on a subject and by separating only the local change in hemodynamic movement from an overall change in hemodynamic movement in the living body in accordance with a logarithmic difference between the two detection signals.