WO2005107572A1 - 被検体内導入装置 - Google Patents
被検体内導入装置 Download PDFInfo
- Publication number
- WO2005107572A1 WO2005107572A1 PCT/JP2005/007407 JP2005007407W WO2005107572A1 WO 2005107572 A1 WO2005107572 A1 WO 2005107572A1 JP 2005007407 W JP2005007407 W JP 2005007407W WO 2005107572 A1 WO2005107572 A1 WO 2005107572A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clock
- subject
- unit
- wireless transmission
- imaging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00011—Operational features of endoscopes characterised by signal transmission
- A61B1/00016—Operational features of endoscopes characterised by signal transmission using wireless means
Definitions
- the present invention relates to an intra-subject introduction device introduced into a subject, for example, an intra-subject introduction device that generates a transmission carrier when wirelessly transmitting image information from a swallowable forceps type endoscope. It is about.
- capsule endoscopes equipped with an imaging function and a wireless function have appeared.
- This capsule type endoscope is used for observation (examination) after being swallowed by a subject, the observation period from the subject's living body (human body) to natural excretion, stomach, small intestine, etc. It moves inside the internal organs (in the body cavity) with its peristalsis, and uses the imaging function to sequentially take images.
- image data captured in the body cavity by the capsule endoscope is sequentially transmitted to an external device provided outside the subject by a wireless function such as wireless communication. And stored in a memory provided in the external device.
- a wireless function such as wireless communication
- the subject suffers from inconvenience during the observation period after swallowing the forceps-type endoscope until it is discharged. Action is possible.
- the doctor or nurse can make a diagnosis based on the image data stored in the memory of the external device by displaying the image inside the body cavity on a display device such as a display. .
- Such a capsule endoscope of this type is, for example, a swallowable type as shown in Patent Document 1, and a battery for power supply is built in the capsule endoscope and supplied from this battery.
- a configuration in which an LED irradiates illumination light with electric power, a reflected image from the inside of the subject caused by the illumination light is captured by an image sensor to obtain image information, and the image information is wirelessly transmitted from a transmission circuit. I have.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-345743
- the transmission circuit is provided with an RF reference clock generation circuit for generating a reference clock in the circuit, and the transmission of the transmission carrier is performed using the reference clock.
- the frequency is stipulated.
- the transmission frequency of the transmission carrier wave abbreviated as "carrier frequency” in the figure
- the receiver side It is necessary to widen the pass band of the band pass filter.
- the pass band is widened in this manner, noise and the like are included in accordance with the width of the pass band, and there has been a problem that the reception sensitivity is reduced.
- the present invention has been made in view of the above problems, and provides an intra-subject introduction apparatus capable of performing stable oscillation of a reference clock and suppressing variations in transmission frequency of a transmission carrier. With the goal.
- an intra-subject introduction device is a subject that is introduced into a subject and acquires information inside the subject.
- An illumination unit configured to output illumination light for illuminating the inside of the subject;
- an imaging unit configured to acquire image information of the inside of the subject illuminated by the illumination unit; and information inside the subject.
- Wireless transmission means for wirelessly transmitting the image data, clock generation means for generating a clock for acquiring image information by the imaging means, and wireless transmission by the wireless transmission means based on the clock generated by the clock generation means.
- a correction means for correcting the clock.
- the clock generation unit includes a frequency division unit for dividing the generated clock.
- the clock divided by the frequency dividing means is output to the wireless transmitting means.
- the clock generation unit may transmit the signal to the wireless transmission unit during a drive timing of the imaging unit. The output of the clock is stopped.
- the correcting means transmits the clock from the clock generating means by wireless transmission by the wireless transmitting means.
- the synchronization means includes a clock for the wireless transmission by the wireless transmission means, the phase of the clock from the clock generation means. It is characterized by synchronization.
- the clock generation unit is configured to perform the wireless transmission when the wireless transmission unit is not operating. The output of the clock to the means is stopped.
- the intra-subject introduction apparatus is based on a clock for acquiring image information by the imaging means, for example, a highly accurate reference clock for dividing the timing of imaging of the imaging system.
- a clock for acquiring image information by the imaging means for example, a highly accurate reference clock for dividing the timing of imaging of the imaging system.
- FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system including an in-vivo introducing apparatus according to a first embodiment.
- FIG. 2 is a block diagram showing an internal configuration of the receiving apparatus according to the first embodiment shown in FIG. 1.
- FIG. 3 is a block diagram showing an internal configuration of the capsule endoscope according to the first embodiment shown in FIG. 1.
- FIG. 4 is a block diagram showing a configuration of an imaging timing system shown in FIG. 3.
- FIG. 5 is a timing chart for explaining the operation of the imaging timing system shown in FIG.
- FIG. 6 is a diagram for explaining a variation in the frequency of a conventional transmission carrier. Explanation of symbols
- Example 1 An embodiment of the intra-subject introduction apparatus according to the present invention will be described in detail with reference to the drawings of FIGS. It should be noted that the present invention is not limited to these embodiments. Various modifications are possible without departing from the spirit of the present invention.
- Example 1
- FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system including the in-vivo introducing apparatus according to the first embodiment.
- a capsule endoscope will be described as an example of an in-vivo introducing device.
- a wireless in-vivo information acquiring system includes a receiving device 3 having a wireless receiving function and a receiving device 3 which is introduced into the subject 1 and captures an image of a body cavity to transmit a video signal to the receiving device 3. And a capsule endoscope (intra-subject introduction device) 2 that transmits the data.
- the wireless in-vivo information acquiring system transmits and receives data between the display device 4 and the display device 4 that displays an in-vivo image based on the video signal received by the reception device 3.
- a portable recording medium 5 for performing the following.
- the receiving device 3 includes a receiving jacket 31 worn by the subject 1 and an external device 32 for processing received radio signals and the like.
- the display device 4 is for displaying an in-vivo image or the like captured by the capsule endoscope 2, and is a workstation that displays an image based on data obtained by the portable recording medium 5, and the like. It has the following configuration. Specifically, the display device 4 may be configured to directly display an image on a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer.
- the portable recording medium 5 is detachable from the external device 32 and the display device 4, and has a structure capable of outputting or recording information when inserted into both.
- the portable recording medium 5 is inserted into the external device 32 while the capsule endoscope 2 is moving in the body cavity of the subject 1, and the capsule endoscope 2 Record the data sent from. Then, after the capsule endoscope 2 is ejected from the subject 1, that is, after the imaging of the inside of the subject 1 is completed, the capsule endoscope 2 is taken out of the external device 32 and inserted into the display device 4, and this display is displayed.
- the device 4 has a configuration in which data recorded on the portable recording medium 5 is read.
- the external device 32 and the display device 4 are wired.
- a portable recording medium 5 such as a compact flash (registered trademark) memory, which also includes a power source
- the portable recording medium 5 is used to transfer data between the external device 32 and the display device 4, but the present invention is not limited to this.
- another recording device built in the external device 32 for example, A configuration may also be adopted in which both are wired or wirelessly connected to each other to transfer data to and from the display device 4 using a hard disk.
- the receiving device 3 has a function of receiving image data of a body cavity wirelessly transmitted from the capsule endoscope 2. As shown in FIG. 2, the receiving device 3 has a shape that can be worn by the subject 1 and includes a receiving jacket 31 provided with receiving antennas Al to An, and a radio signal received via the receiving jacket 31. And an external device 32 for performing processing and the like. Each of the receiving antennas Al to An may be directly attached to the outer surface of the subject 1 and may not be provided on the receiving jacket 31 or may be detachable from the receiving jacket 31.
- the external device 32 performs predetermined signal processing such as demodulation on the radio signals received by the reception antennas Al to An, and obtains the radio signals obtained by the neutral force capsule endoscope 2.
- image data is recorded on the portable recording medium 5 via the storage unit 35.
- the external device 32 includes a power supply unit 38 including a predetermined power storage device or an AC power adapter. Each component of the external device 32 uses power supplied from the power supply unit 38 as driving energy.
- the capsule endoscope 2 includes, for example, a light emitting element (LED) 20 as an illuminating means for irradiating a test site in a body cavity of the subject 1, and a driving state of the LED 20.
- Drive circuit 21 that controls the state of the CCD
- CCD charge-coupled device
- the imaging timing generation circuit 26 as a clock generation means for outputting a reference clock for giving a drive timing such as an imaging timing of the CCD 23 is provided.
- the capsule endoscope 2 includes an RF transmission unit 27 that modulates the captured image signal into an RF signal, and a transmission unit that wirelessly transmits the RF signal output from the RF transmission unit 27.
- An antenna unit 28 is provided.
- the capsule endoscope 2 includes a system control circuit 29 that controls the operations of the LED drive circuit 21, the CCD drive circuit 24, and the RF transmission unit 27.
- the CCD 23, the CCD driving circuit 24, the signal processing circuit 25, and the imaging timing generation circuit 26 are collectively referred to as an imaging unit 22.
- the capsule endoscope 2 can configure the desired imaging timing with the image information of the test site irradiated by the LED 20 while being introduced into the subject 1. It operates so as to be acquired by the CCD 23 based on the reference clock to be obtained.
- the acquired image information is subjected to signal processing by a signal processing circuit 25 based on the reference clock, and further converted to an RF signal by an RF transmission unit 27, and then transmitted to the outside of the subject 1 via a transmission antenna unit 28. Has been sent to.
- the imaging timing generation circuit 26 has a built-in circuit for generating a reference clock (not shown). As shown in FIG. 4, the LED drive circuit 21, the CCD drive circuit 24, and the signal processing circuit 25 configure drive timing. And a RF clock divider 26a as a frequency dividing means for dividing the reference clock, and outputs the frequency-divided clock from the RF clock divider 26a to the RF transmitting unit 27. are doing.
- the reference clock output from the imaging timing generation circuit 26 is configured with high accuracy so as to be a reference for minute timing in the drive signal of the imaging device, and the absolute value of the frequency shift is set to be small. .
- the high-precision reference clock constituting the imaging timing of the CCD is divided by the RF clock dividing circuit 26a, so that the RF reference clock is output.
- the image signal output from the CCD 23 is output from the signal processing unit 25a of the signal processing circuit 25 After being subjected to desired signal processing, converted into a digital signal by AZD conversion of the AZD converter 25b, further converted into a serial signal by parallel Z-serial conversion by the PZS converter 25c, and encoded by the encoder 25d, Output to RF transmitter unit 27.
- the RF transmission unit 27 includes a PLL circuit 27a as a synchronization unit that takes in the clock divided by the RF clock dividing circuit 26a. That is, the RF clock divider 26a outputs an RF clock obtained by dividing the imaging reference clock by 4, as shown in FIG. 5, for example, and the PLL circuit 27a outputs the RF clock based on the RF clock.
- the transmission carrier is oscillated stably to reduce the variation in transmission frequency. Perform wireless transmission.
- the imaging unit outputs the RF clock with high frequency stability accuracy to the RF transmitting unit, and synchronizes the phase of the RF reference clock with the RF clock.
- the imaging unit outputs the RF clock with high frequency stability accuracy to the RF transmitting unit, and synchronizes the phase of the RF reference clock with the RF clock.
- a clock obtained by dividing the frequency of the imaging reference clock constituting the imaging timing of the CCD is output to the RF transmission unit, and the RF reference clock is corrected.
- the output current of the output pin of the IC can be reduced, and the current consumption of the clock output can also be reduced.
- the RF clock output from the frequency divider is stopped, and the drive state of the CCD is notified to the RF transmission unit 27 using the enable signal. It is also possible.
- the imaging timing generation circuit 26 the RF transmission unit can be stopped from driving, and the power consumption of the entire system can be reduced.
- the RF clock divider circuit is, for example, an RF clock divider.
- the RF clock can be set higher than the transfer frequency of one CCD pixel so that the clock and the RF reference clock can be synchronized. For example, this frequency division directly generates a high-frequency band RF reference clock. Then, it is also possible to output this RF reference clock to the RF transmission unit.
- the intra-subject introduction device that is useful in the present invention is useful for a medical observation device that is introduced into the human body and observes a test site, such as a capsule endoscope. It is suitable for performing stable oscillation of the reference clock and suppressing variations in the transmission frequency of the transmission carrier.
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Endoscopes (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05730678A EP1747748B1 (en) | 2004-05-10 | 2005-04-18 | Device for introduction into subject |
| US11/595,052 US7860471B2 (en) | 2004-05-10 | 2006-11-09 | Body-insertable apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-139892 | 2004-05-10 | ||
| JP2004139892A JP4370198B2 (ja) | 2004-05-10 | 2004-05-10 | 被検体内導入装置 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/595,052 Continuation US7860471B2 (en) | 2004-05-10 | 2006-11-09 | Body-insertable apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005107572A1 true WO2005107572A1 (ja) | 2005-11-17 |
Family
ID=35319991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/007407 Ceased WO2005107572A1 (ja) | 2004-05-10 | 2005-04-18 | 被検体内導入装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7860471B2 (ja) |
| EP (1) | EP1747748B1 (ja) |
| JP (1) | JP4370198B2 (ja) |
| CN (1) | CN100450424C (ja) |
| WO (1) | WO2005107572A1 (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007260066A (ja) * | 2006-03-28 | 2007-10-11 | Pentax Corp | 内視鏡装置 |
| JP2008036356A (ja) * | 2006-08-10 | 2008-02-21 | Olympus Corp | 電子内視鏡装置及び電子内視鏡システム |
| JP5622350B2 (ja) * | 2007-12-05 | 2014-11-12 | オリンパスメディカルシステムズ株式会社 | 被検体内導入装置および被検体内情報取得システム |
| WO2020144862A1 (ja) * | 2019-01-11 | 2020-07-16 | オリンパス株式会社 | カプセル型内視鏡システム及び受信装置 |
| US11627243B2 (en) * | 2021-07-23 | 2023-04-11 | Phaox LLC | Handheld wireless endoscope image streaming apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10303802A (ja) * | 1997-04-16 | 1998-11-13 | Motorola Inc | 通信制御装置および方法 |
| WO2001039401A1 (en) * | 1999-11-22 | 2001-05-31 | Macros Japan Inc. | Call suppressor for spread spectrum portable telephone |
| JP2001245844A (ja) * | 2000-03-03 | 2001-09-11 | Asahi Optical Co Ltd | カプセル内視鏡 |
| JP2001304879A (ja) * | 2000-04-27 | 2001-10-31 | Maspro Denkoh Corp | 車載用衛星追尾装置及び車載用衛星受信システム |
| US20010035902A1 (en) | 2000-03-08 | 2001-11-01 | Iddan Gavriel J. | Device and system for in vivo imaging |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920003656B1 (ko) * | 1988-04-01 | 1992-05-06 | 샤프 가부시끼 가이샤 | 전자적으로 화상을 확대하여 촬영이 가능한 촬상 장치 |
| US5408265A (en) * | 1992-02-07 | 1995-04-18 | Olympus Optical Co., Ltd. | Electronic endoscope system adaptable to different T.V. standards while utilizing a common light source |
| IL108352A (en) | 1994-01-17 | 2000-02-29 | Given Imaging Ltd | In vivo video camera system |
| JP2002345743A (ja) | 2001-05-28 | 2002-12-03 | Fuji Photo Film Co Ltd | カプセル内視鏡 |
| JP4152606B2 (ja) | 2001-06-26 | 2008-09-17 | 三菱電機株式会社 | 撮像機能内蔵携帯端末装置 |
| JP4744026B2 (ja) * | 2001-07-30 | 2011-08-10 | オリンパス株式会社 | カプセル内視鏡およびカプセル内視鏡システム |
| JP4363843B2 (ja) * | 2002-03-08 | 2009-11-11 | オリンパス株式会社 | カプセル型内視鏡 |
-
2004
- 2004-05-10 JP JP2004139892A patent/JP4370198B2/ja not_active Expired - Fee Related
-
2005
- 2005-04-18 WO PCT/JP2005/007407 patent/WO2005107572A1/ja not_active Ceased
- 2005-04-18 EP EP05730678A patent/EP1747748B1/en not_active Expired - Lifetime
- 2005-04-18 CN CNB2005800149299A patent/CN100450424C/zh not_active Expired - Fee Related
-
2006
- 2006-11-09 US US11/595,052 patent/US7860471B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10303802A (ja) * | 1997-04-16 | 1998-11-13 | Motorola Inc | 通信制御装置および方法 |
| WO2001039401A1 (en) * | 1999-11-22 | 2001-05-31 | Macros Japan Inc. | Call suppressor for spread spectrum portable telephone |
| JP2001245844A (ja) * | 2000-03-03 | 2001-09-11 | Asahi Optical Co Ltd | カプセル内視鏡 |
| US20010035902A1 (en) | 2000-03-08 | 2001-11-01 | Iddan Gavriel J. | Device and system for in vivo imaging |
| JP2001304879A (ja) * | 2000-04-27 | 2001-10-31 | Maspro Denkoh Corp | 車載用衛星追尾装置及び車載用衛星受信システム |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1747748A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| US7860471B2 (en) | 2010-12-28 |
| EP1747748B1 (en) | 2012-01-25 |
| JP2005319098A (ja) | 2005-11-17 |
| EP1747748A1 (en) | 2007-01-31 |
| CN100450424C (zh) | 2009-01-14 |
| JP4370198B2 (ja) | 2009-11-25 |
| US20070083083A1 (en) | 2007-04-12 |
| EP1747748A4 (en) | 2010-03-03 |
| CN1950020A (zh) | 2007-04-18 |
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