WO2005030058A1 - 光を用いた生体の物質特性検査装置 - Google Patents
光を用いた生体の物質特性検査装置 Download PDFInfo
- Publication number
- WO2005030058A1 WO2005030058A1 PCT/JP2004/014338 JP2004014338W WO2005030058A1 WO 2005030058 A1 WO2005030058 A1 WO 2005030058A1 JP 2004014338 W JP2004014338 W JP 2004014338W WO 2005030058 A1 WO2005030058 A1 WO 2005030058A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- probe
- living body
- display
- material property
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/04—Arrangements of multiple sensors of the same type
- A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
Definitions
- the present invention relates to an apparatus for inspecting a material property of a living body using light, and more particularly to an apparatus for inspecting a material property including a light emitting element for entering light into a living body and a light receiving element for receiving light from the living body. It is.
- a multi-mode oscillation laser is used as a light source to irradiate a living body, combine reflected light from inside the living body with different refractive indexes, and combine the combined light with a mode. It is disclosed that a light-wave echo coat graph is obtained by performing spectral separation on a per-wave basis.
- the conventional technology for obtaining material properties of a living body using light uses a difference in spectral distribution between incident light and reflected light. Therefore, a light source with a stable wavelength, a spectroscope for analyzing the spectrum, and an analyzer for analyzing the change in the spectrum between the incident light and the reflected light are required, resulting in a large-scale system! / Puru.
- An object of the present invention is to solve such a problem of the related art and to provide an apparatus for inspecting material properties of a living body using light having a simpler configuration.
- An object of the present invention is to provide an apparatus for inspecting material properties of a living body using light that can measure a two-dimensional distribution of material properties with a simpler configuration. Disclosure of the invention
- a periodic light output is incident on a living body by driving a light emitting element, and a change in reflected light is received by a light receiving element and observed. It is based on the finding that a phase difference occurs between the light output from the light receiving element and the periodic output signal.
- periodic light is incident on fat, which is one of the living tissue, from an LED (Light Emission Diode), the reflected light is detected by a photodiode, and the input signal to the LED and the output signal from the photodiode are detected.
- 5 shows an example of observing a phase difference between.
- the horizontal axis is the light output of the LED
- the vertical axis is the phase difference between the input signal and the output signal
- the parameter is the frequency of the input signal.
- phase shift method as a method for accurately detecting a phase difference between an input signal and an output signal (see Japanese Patent Publication No. 9145691).
- the present invention applies the phase shift method to the measurement of the phase difference that appears between an input signal and an output signal when light enters a living body, and accurately and quantitatively examines the material properties of the living body with respect to light. Is to try.
- the biological material property inspection apparatus using light includes a probe base and a probe element held by the probe base, and emits light that enters the living body.
- a probe element having an optical element and a light receiving element for receiving light from a living body; an amplifier having an input terminal connected to a signal output terminal of the light receiving element; an output terminal of the amplifier and a signal input terminal of the light emitting element;
- a phase compensation circuit that changes the frequency of the signal to reduce the phase difference between the input waveform to the light emitting element and the output waveform from the light receiving element to zero, a probe element, an amplifier, and a phase
- the frequency of self-excited oscillation generated by compensating the phase difference to zero by the feedback loop formed by the compensation circuit and measuring the force, the light is incident on the living body and the living body is receiving the light.
- a frequency deviation detector for detecting a deviation out of the detected frequency deviation as a material characteristic of the living body
- output means for inputting power
- the biological material property inspection apparatus using light comprises a probe base and a plurality of probe elements arranged and held two-dimensionally on the probe base.
- the touch elements are a plurality of touch elements each having a light emitting element for entering light into a living body, a light receiving element for receiving light from the living body, a signal input terminal of the light receiving element for each touch element, and the light emitting element.
- a material property calculator for calculating material properties of a living body, a switching circuit for sequentially switching the connection between each probe element and the material property calculator, and a probe for each probe.
- An indicator having an input terminal connected to a signal output terminal of the light receiving element, and an output terminal of the amplifier and a light emitting element.
- a feedback loop formed by the probe, the amplifier, and the phase compensation circuit to eliminate the phase difference between the input waveform to the light-emitting element and the output waveform of the light-receiving element.
- the frequency of the self-excited oscillation generated by compensating the phase difference to zero is measured, and the frequency when the light is incident on the living body and the light when the light is received and the frequency when the light is not incident on the living body are measured.
- a frequency deviation detector for detecting a deviation between the two. The method is characterized in that a material characteristic of a living body is inspected from a two-dimensional distribution of the frequency deviation.
- the display is provided on the back surface of the probe base opposite to the element arrangement surface on which the respective probe elements are arranged.
- a storage unit provided on the back surface side of the probe base and storing a display, and provided on a part of the storage unit, And a signal line which is drawn out of the display and has a display-side connection portion detachably connected to the base-side connection portion at one end, and a display-side connection portion of the signal line. It is preferable that the display device be housed in the housing portion of the probe base body while the connector is connected to the base-side connection portion.
- the probe base further includes an external connection portion for connecting to an external device, and the display-side connection portion includes an external connection portion. It is preferable to have a structure that can be connected to the connection part.
- the biological material property inspection apparatus using light according to the present invention, light emission
- the phase difference between the input waveform to the element and the output waveform from the light receiving element is converted into a frequency deviation by the phase shift method.
- the quantitative measurement of the frequency can use a measuring instrument with much higher accuracy. Therefore, other than the light emitting element and the light receiving element, the material properties of the living body using light can be inspected by a simple method using only an electronic circuit and a frequency measuring device.
- a probe having a light emitting element and a light receiving element as a pair two-dimensionally, it is possible to two-dimensionally display a material property of a living body using light.
- the examiner can press the probe base against the biological tissue, for example, while pressing the probe base in real time to obtain a two-dimensional display of the material properties of the living body using light.
- the distribution can be grasped.
- the display unit detachable with the probe base force and connecting it to the probe base by a signal line the patient can place the display unit in a position where observation can be performed while pressing the probe base against biological tissue, for example. It is possible to grasp the two-dimensional distribution of the material properties of living organisms using light.
- FIG. 1 is a diagram for explaining observation results that form the basis of the concept of the present invention.
- the periodic light enters a living tissue from a light-emitting element, and reflected light is detected by a light-receiving element. It is a figure which shows that a phase difference is observed between an input signal and an output signal of a light receiving element.
- FIG. 2 is a perspective view of the material property inspection device according to the embodiment of the present invention, as viewed from above.
- FIG. 3 is a side view of the material property inspection device according to the embodiment of the present invention.
- FIG. 4 is a perspective view of the material property inspection device according to the embodiment of the present invention as viewed from the lower surface side.
- FIG. 5 is a detailed view around a probe element in an embodiment according to the present invention.
- FIG. 6 is a diagram showing a circuit configuration around a light emitting element and a light receiving element in the embodiment according to the present invention.
- FIG. 7 is a block diagram of an electronic circuit unit according to an embodiment of the present invention.
- FIG. 8 is a block diagram of a characteristic calculating unit according to the embodiment of the present invention.
- FIG. 9 is a diagram showing a configuration of a material property inspection device according to another embodiment.
- FIG. 10 is a diagram for explaining a first usage in another embodiment.
- FIG. 11 is a diagram for explaining a second usage in another embodiment.
- FIG. 12 is a diagram for explaining a third usage in another embodiment.
- the material property inspection device 10 includes a disk-shaped probe base 12 and a grip portion 14 extending from the probe base 12 and held by a hand.
- the probe base 12 has a plurality of probe elements 20 that are pressed against the surface of the living body arranged two-dimensionally on the lower surface side, and holds the plurality of display elements 40 on the upper surface side. It is a disk-shaped member that is arranged and held two-dimensionally in accordance with. For example, a plastic molded product having a diameter of about 60 mm and a thickness of about 20 mm, in which about 40 to 50 probe elements 20 and display elements 40 are two-dimensionally arranged, can be used. Further, a small display 42 can be arranged on the upper surface side.
- the grip portion 14 is a handle-shaped member that is fixedly connected to the probe base 12 and has a size that can be stably gripped by hand.
- a plastic molded product having a thickness of about 20 mm, a width of the handle portion of about 45 mm, and a length of about 100 mm in accordance with the probe base 12 can be used.
- the electronic circuit unit 50 for performing signal processing is housed.
- the output of the electronic circuit unit 50 can also be connected to an external diagnostic device or the like (not shown) via the external interface 51.
- part or all of the electronic circuit unit 50 may be taken out of the grip unit 14 and connected to the probe 20 and the display element 40 by a signal line. The details of the electronic circuit unit 50 will be described later.
- One probe element 20 is configured by arranging one light emitting element and one light receiving element adjacent to each other. Further, in order to efficiently receive the reflected light, a plurality of light emitting elements may be arranged around one light receiving element to form one probe 20.
- Figure 5 shows one probe 20
- FIG. 3 is a diagram showing details around a probe element 20 in an example in which the light emitting element 26 and one light receiving element 28 are configured.
- the probe element 20 has a light-emitting element 26 and a light-receiving element 28 arranged on a mount 24 (in FIG. 5, facing downwards in the drawing), and a substantially hemispherical plastic
- the contact ball 30 is configured to be covered.
- the mounting stand 24 can be formed of, for example, a circuit board.
- the probe element 20 is fixed to the probe base 12 by bonding or the like on the bottom surface on the side of the mounting table 24.
- the light emitting element 26 has a function of making light incident on the living tissue 16, and can be configured by an LED.
- the light receiving element 28 is an element having a function of detecting light reflected from the living tissue 16, for example, a lump 18 inside the living tissue 16, and can be constituted by a photosensor.
- FIG. 6 is a diagram showing a circuit configuration around the light emitting element 26 and the light receiving element 28.
- the light emitting element 26 has one end connected to the power supply and the other end connected to the switching element 27.
- the switching element 27 can be composed of, for example, an npn transistor.In this case, the collector is connected to the other end of the light emitting element 26, the emitter is connected to ground, and the base is connected to the signal line 54a via the AC signal generator 25. Connected to.
- One end of the light receiving element 28 is connected to the power supply via the resistance element 29, the other end is connected to the ground, and the connection with the resistance element 29 is connected to the signal line 54b.
- the signal lines 54a and 54b are input to a switching circuit 60 described later.
- the switching element 27 operates in response to the input signal supplied from the signal line 54a, whereby the light emitting element 26 emits a periodic light output toward the living body.
- the reflected light of biological force is received by the light receiving element 28, converted into a voltage signal by the resistance element 29, and output to the signal line 54b as an output signal.
- the contact ball 30 has a function of condensing incident light and reflected light due to its hemispherical shape.
- the hemispherical surface is applied to the living tissue 16. This is a member that has the function of smoothly pressing.
- the contact ball 30 that is strong can be obtained by, for example, supplying a plastic resin such as nylon resin onto the mounting base 24 and molding the plastic resin using a hemispherical mold.
- FIG. 7 is a block diagram of the electronic circuit unit 50.
- the electronic circuit unit 50 includes a switching circuit 60, a characteristic calculation unit 64, a data collection unit 70, a display processing unit 72, a display unit 74, and a control unit 76 that controls these as a whole.
- the switching circuit 60 turns on a specific switch among the plurality of switches under the control of the control unit 76, thereby selecting a specific probe element from the plurality of probe elements, and
- This is a selection switch circuit having a function of connecting to the calculation unit 64. That is, the signal line 54a from the light emitting element 26 of the selected specific probe element is connected to the signal line 84a, and the signal line 54b from the light receiving element 28 is connected to the signal line 84b. It has the function of connecting to 64.
- Semiconductor switches can be used for the plurality of switches 80. The connection is switched sequentially for each probe element 20, for example, by assigning an address to each probe element 20 and synchronizing the corresponding light emitting element 26 and light receiving element 28 in the order of address according to the scanning method.
- the scanning method is controlled by the control unit 76.
- the arrangement of the probe elements may be regarded as a matrix arrangement, and line scanning may be performed by scanning one line at a time. They run in the shape of a letter.
- the characteristic calculation unit 64 For each of the probe elements 20 selected by the switching circuit 60, the characteristic calculation unit 64 generates a signal at the signal input terminal of the light emitting element 26, that is, a signal of the signal line 54a, and a signal output of the light receiving element 28. This is a circuit for calculating the material properties of the portion of the living tissue facing the probe element 20 based on the end signal, that is, the signal on the signal line 54b. The calculated material property data is sent to the data collection unit 70 in association with each of the probe elements 20. For the correspondence, for example, the above-described probe element address can be used.
- FIG. 8 is a block diagram of the characteristic calculator 64.
- the characteristic calculation unit 64 is connected to the light emitting element 26 of the probe element 20 via the signal lines (54a) and 84a, and the terminal 94 is connected to the light receiving element 28 via the signal lines (54b) and 84b.
- the terminal 92 is provided.
- the characteristic calculation unit 64 is provided between the amplifier 96 having an input terminal connected to the terminal 92 and the output terminal of the amplifier 96 and the terminal 94, and is configured to receive the input waveform to the light emitting element 26 and the signal from the light receiving element 28.
- a phase shift circuit 98 for changing the frequency to shift the phase difference to zero is provided.
- the contents of the phase shift circuit having a powerful function are described in Japanese Patent Application Laid-Open No. 9-145691. No. is described in detail!
- a frequency change caused by a change in the material properties of the living tissue is represented by a frequency change amount.
- the frequency change is detected by the detection unit 100 and converted by the material property converter 102 into the material property of the living tissue.
- a calibration table or the like can be used.
- the calibration table can be created, for example, when the material properties of the living body are to be the hardness of the living body, by pressing a reference substance, which can be a hardness reference, to the tip of the contact ball and obtaining the frequency change at that time.
- Use a reference material such as standard lactate fat or muscle without lumps, or silicone rubber that has a firm correspondence with standard lactate fat or muscle. Can be.
- the converted material property signal is output from terminal 104.
- the center frequency of the oscillation frequency in the closed loop resonance state including the light emitting element 26, the light receiving element 28, and the living tissue is the frequency of the AC signal generating unit 25 connected to the gate of the light emitting element 26.
- the frequency is changed by the phase shift circuit 98.
- the AC signal generator 25 can change its frequency by a feed knock by the light receiving element 28-amplifier 96-phase shift circuit 98.
- the AC signal generating section 25 can be constituted by, for example, an LCR circuit or the like.
- the center frequency of the AC signal generator 25 can be, for example, several tens of kHz to 1 MHz as described with reference to FIG.
- the data collection unit 70 is a storage device that associates and stores the material property data for each probe element 20.
- the above-described probe element address can be used for association.
- the display processing unit 72 is a circuit that reads necessary data from the data collection unit 70 and performs signal processing for displaying two-dimensional substance data. For example, as shown in FIG. 2, when the display unit 74 is a two-dimensional array of the plurality of display elements 40, a process of associating the output to each display element with the two-dimensional array of each probe 20 is performed. That is, when observing the display unit 74, each display element 40 performs an associating process on the probe base 12 so as to represent the material property detected by the probe element 20 directly below each display element 40.
- the display-processed data is output to the display unit 74.
- the display unit 74 has a plurality of display elements 40 arranged two-dimensionally, and preferably has an arrangement corresponding to the two-dimensional arrangement of the plurality of probe elements as described above.
- a light emitting element such as a light emitting diode, a two-dimensionally arranged pixel of a liquid crystal display, or the like can be used.
- the material properties of the living body for example, hardness are represented by the luminance of the display element, for example, as the hardness of the living tissue shows a larger value, that is, as the degree of lumps becomes worse. In other words, it can be expressed with increased brightness.
- the hardness can be indicated by different colors or shades of color using a variable color light emitting diode or a color liquid crystal display.
- the degree of lumps can be represented visually by changing the color from blue to yellow to red as the hardness of the living tissue shifts from a small value to a large value.
- the material properties corresponding to each probe element are immediately processed and are displayed on the display unit 74 in real time. Can be displayed.
- the data collection unit 70 is used as a storage device for storing past data as a database, the data read from the database can be displayed on the display unit 74.
- a general small display 42 as shown in Fig. 2 may be provided.
- the small display 42 may be used to display, for example, statistical processing data such as an average value of the material properties of the entire measurement area.
- FIG. 9 is a diagram showing a configuration of a material property inspection device 210 according to another embodiment.
- a main body portion 220 and a display portion 230 have a separate structure, and are detachable via a connector.
- the display unit 230 includes a plurality of display elements 240 two-dimensionally arranged, includes a signal line 232, and a display-side connector 234 is provided at one end of the signal line 232.
- the body portion 220 is provided with a base-side connector 252.
- the base-side connector 252 is connected to the electronic circuit section 250.
- an external interface 254 is provided in parallel with the base-side connector 252.
- the display-side connector 234 has a structure connectable to both the base-side connector 252 and the external interface 254.
- the main body part 220 and the display part 230 are not shown in the figure, but they fit into the fittings and the parts and can be integrated. That is, the display-side connector 234 is connected to the base-side connector 252, the signal line 232 is folded and housed in the space of the connection part of the main body part 220 or the display part 230, and the main body part 220 and the display part 230 are connected. By fitting to the fitting portion, an integrated material property inspection device 210 can be obtained.
- the appearance of the integrated material property inspection device 210 is the same as that of the material property inspection device 10 described with reference to FIG. 2, and the usage in that form is also the same.
- FIG. 10-12 shows an example of a material property display method of the material property inspection apparatus 210.
- FIG. 10 is a diagram showing an example of the first usage.
- This method is a method which can be performed by the material property inspection apparatus 10 described with reference to FIG. That is, the main body part 220 and the display part 230 are used integrally and connected to the external diagnostic device 300 using the external interface 254.
- the external diagnostic device 300 for example, a computer having a larger display screen and data processing ability can be used.
- the inspector holds the material property inspection device 210 in his / her hand, presses the material property inspection device 210 against the body surface of the subject, and displays the indicator portion 230 on the lump state and the like.
- the subject can also know the state by looking at the screen of the external diagnostic device 300.
- FIG. 11 is a diagram showing an example of the second usage.
- the connection between the display-side connector 234 and the base-side connector 252 is left as it is, the fitting between the main body portion 220 and the display portion 230 is removed, and the signal line 232 is extended.
- the subject holds the material property inspection apparatus 210 by himself and presses the material property inspection apparatus 210 against his / her own body surface, and uses the screen of the display unit 230 to make a lump. You can know the state of the state.
- FIG. 12 is a diagram showing a third example of usage.
- the display unit 230 is detached from the main body 220, the connection between the display side connector 234 and the base side connector 252 is also disconnected, and the display side connector 234 is connected to the external interface 254.
- FIG. 12 Although the same usage as the second usage described in is possible, since the signal line 232 is connected to the end of the main body 220, it is easier to operate the main body 220 by hand. Industrial applicability
- the apparatus for inspecting material properties of a living body using light can be used for an inspecting apparatus and a diagnostic apparatus for observing a state of a body surface of a living body such as a tumor and a state inside a living body such as a lumps.
- it can be used for an apparatus for measuring material properties of a living body by holding a probe portion by hand.
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/572,062 US7583383B2 (en) | 2003-09-30 | 2004-09-30 | Biological property check device using light |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003341880A JP4348467B2 (ja) | 2003-09-30 | 2003-09-30 | 光を用いた生体の物質特性検査装置 |
JP2003-341880 | 2003-09-30 |
Publications (1)
Publication Number | Publication Date |
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WO2005030058A1 true WO2005030058A1 (ja) | 2005-04-07 |
Family
ID=34386234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/014338 WO2005030058A1 (ja) | 2003-09-30 | 2004-09-30 | 光を用いた生体の物質特性検査装置 |
Country Status (3)
Country | Link |
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US (1) | US7583383B2 (ja) |
JP (1) | JP4348467B2 (ja) |
WO (1) | WO2005030058A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104523241A (zh) * | 2015-01-21 | 2015-04-22 | 浙江大学 | 一种生物组织光学特性的检测装置和检测方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5071768B2 (ja) * | 2006-12-08 | 2012-11-14 | 学校法人日本大学 | 血流速度測定装置 |
JP5071767B2 (ja) * | 2006-12-08 | 2012-11-14 | 学校法人日本大学 | 生体組織血流量測定装置 |
JP5388891B2 (ja) * | 2009-02-09 | 2014-01-15 | 株式会社 タウザー研究所 | 血管脈波測定システム及び光を用いる物性特性測定システム |
JP5459406B2 (ja) * | 2010-08-31 | 2014-04-02 | 株式会社島津製作所 | 送光用プローブ、受光用プローブ、送受光用プローブ及びこれを用いた光測定装置 |
JP5504402B2 (ja) * | 2011-02-02 | 2014-05-28 | 定夫 尾股 | 生体のしこり検査装置 |
JP6671631B2 (ja) * | 2015-01-06 | 2020-03-25 | 株式会社リコー | 光学センサ、光学検査装置、及び光学特性検出方法 |
WO2017086537A1 (ko) | 2015-11-17 | 2017-05-26 | 경희대학교산학협력단 | 센서 어레이를 이용한 생체 정보 측정 장치 및 방법 |
KR101779264B1 (ko) * | 2015-12-16 | 2017-09-18 | 경희대학교 산학협력단 | 센서 어레이를 이용한 생체 정보 측정 장치 |
Citations (2)
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JPS62164434A (ja) * | 1986-01-16 | 1987-07-21 | オリンパス光学工業株式会社 | 皮膚のやわらかさ測定装置 |
JPH09145691A (ja) * | 1995-09-20 | 1997-06-06 | Sadao Omata | 周波数偏差検出回路及びそれを利用した測定器 |
Family Cites Families (8)
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US5792051A (en) * | 1988-12-21 | 1998-08-11 | Non-Invasive Technology, Inc. | Optical probe for non-invasive monitoring of neural activity |
US5360004A (en) * | 1992-12-09 | 1994-11-01 | Diasense, Inc. | Non-invasive determination of analyte concentration using non-continuous radiation |
US5460177A (en) * | 1993-05-07 | 1995-10-24 | Diasense, Inc. | Method for non-invasive measurement of concentration of analytes in blood using continuous spectrum radiation |
JPH0749306A (ja) | 1993-08-04 | 1995-02-21 | Naohiro Tanno | 光波エコートモグラフィー装置 |
US5725480A (en) * | 1996-03-06 | 1998-03-10 | Abbott Laboratories | Non-invasive calibration and categorization of individuals for subsequent non-invasive detection of biological compounds |
JP3888427B2 (ja) * | 2001-10-30 | 2007-03-07 | 学校法人日本大学 | 変位センサ |
JP3931638B2 (ja) | 2001-11-15 | 2007-06-20 | 松下電工株式会社 | 生体成分の定量装置 |
CN1298284C (zh) * | 2002-02-14 | 2007-02-07 | 加藤俊德 | 生物体机能诊断装置 |
-
2003
- 2003-09-30 JP JP2003341880A patent/JP4348467B2/ja not_active Expired - Fee Related
-
2004
- 2004-09-30 US US10/572,062 patent/US7583383B2/en not_active Expired - Fee Related
- 2004-09-30 WO PCT/JP2004/014338 patent/WO2005030058A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62164434A (ja) * | 1986-01-16 | 1987-07-21 | オリンパス光学工業株式会社 | 皮膚のやわらかさ測定装置 |
JPH09145691A (ja) * | 1995-09-20 | 1997-06-06 | Sadao Omata | 周波数偏差検出回路及びそれを利用した測定器 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104523241A (zh) * | 2015-01-21 | 2015-04-22 | 浙江大学 | 一种生物组织光学特性的检测装置和检测方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4348467B2 (ja) | 2009-10-21 |
JP2005103054A (ja) | 2005-04-21 |
US7583383B2 (en) | 2009-09-01 |
US20080037021A1 (en) | 2008-02-14 |
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