EP2205141A1 - Verfahren zur führung eines kapsel-endoskops und endoskopsystem - Google Patents
Verfahren zur führung eines kapsel-endoskops und endoskopsystemInfo
- Publication number
- EP2205141A1 EP2205141A1 EP08843493A EP08843493A EP2205141A1 EP 2205141 A1 EP2205141 A1 EP 2205141A1 EP 08843493 A EP08843493 A EP 08843493A EP 08843493 A EP08843493 A EP 08843493A EP 2205141 A1 EP2205141 A1 EP 2205141A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capsule
- endoscope
- rotational position
- guiding
- rotation
- 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
- A61B1/00147—Holding or positioning arrangements
- A61B1/00158—Holding or positioning arrangements using magnetic field
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/73—Manipulators for magnetic surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body of the patient
- A61B5/065—Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe
-
- 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
- A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
- A61B1/00009—Operational features of endoscopes characterised by electronic signal processing of image signals during a use of endoscope
Definitions
- the invention relates to a magnetically guided capsule endoscope or a magnetically guided endoscope capsule and to a method for operating the capsule endoscope or the endoscope capsule system.
- a magnetically controlled endoscope capsule is described, for example, in DE 101 42 253 C1. Magnetic guidance is achieved by magnetic forces due to magnetic gradient fields acting on a permanent magnet in the capsule, the magnetic gradient field being generated by means of an external guide magnet.
- the external guide magnet is preferably an electromagnet, as described for example in DE 103 40 925 B3 or WO 2006/092421 Al.
- the guide magnet contains one or more mechanically movable permanent magnets.
- the capsule As an alternative to magnetic guidance by means of magnetic forces, the capsule, as described in US 2003/0181788 Al, externally be provided with a kind of thread and the principle of an Archimedes screw through a bowel section are moved, with magnetic torques act on the capsule caused by the interaction of a rotating external magnetic field with a permanently embedded in the capsule permanent magnet.
- the magnetization direction of the permanent magnet of the capsule is preferably perpendicular to the longitudinal axis of the capsule. Furthermore, the position and location of the
- Capsule are partially measured electromagnetically, as described for example in WO 2005/120345 A2, where there only 5 of the 6 possible coordinates are measured and a measurement of the rotation or rotation angle about the longitudinal axis of the capsule is not possible.
- the center of gravity coordinates and the direction of magnetization of the permanent magnet in the capsule must be known exactly at any time.
- the capsule With the permanent magnet in it, rotates about the longitudinal axis until the external magnetic field and magnetization direction of the permanent magnet again coincide.
- the external magnetic field is not strong enough, a mismatch between the external magnetic field and the magnetization direction of the permanent magnet will remain due to frictional forces that prevent the capsule from moving freely.
- the method for, in particular magnetic, guidance of a capsule endoscope whose endoscope capsule has a rotation sensor for measuring a rotational position of the endoscope capsule about its longitudinal axis L comprises the following steps:
- the method also includes calculating, measuring, and comparing additional coordinates other than the rotational position to correct for a general capsule position.
- the method may also include calculating a multi-dimensional, in particular 6D, capsule position from the mechanical motion model; measuring a multi-dimensional capsule position (by means of multiple capsule-internal and / or capsule-external sensors); comparing the measured multi-dimensional capsule position and a capsule position calculated for a substantially same time; as well as calculating a corrected, in particular 6D, capsule position in the mechanical motion model based on the comparison.
- the capsule movement is preferably carried out by a magnetic see leadership.
- the associated endoscope system therefore has a guide magnet or a magnet system for generating defined magnetic fields at the location of the endoscope capsule for guiding the endoscope capsule.
- the control of the guide magnet may be implemented in hardware, firmware, software, or a combination thereof.
- an electromagnet as a guide magnet for magnetic guidance of the endoscope capsule
- a method is preferred in which after the step of calculating the corrected rotational position correspondingly corrected coil currents are set to the guide electromagnet.
- the associated endoscope system uses a mechanically movable permanent magnet (or a permanent magnet system) as guide magnet for the magnetic guidance of the endoscope capsule, a method is preferred in which adjusted according to the step of calculating the corrected rotational position, a correspondingly corrected position of the permanent magnet (s) becomes.
- the angle of rotation of the endoscope capsule is aligned in a substantially known position.
- a magnetically guided endoscope capsule with a capsule-fixed magnetic element, in particular permanent magnets, with fixed magnetization, usually in capsule fixed coordinates, preferably so that the rotation angle of the endoscope capsule is aligned by applying a sufficiently strong external capsule magnetic field at the site of the capsule, creating a known orientation or orientation of the magnetic element is achieved at the (capsule-external) magnetic field at this time.
- the capsule is moved with far lower magnetic fields (and possibly also additional field gradients), although in this situation the direction of magnetization of the magnetic element is If the magnetic field vector is no longer exactly parallel to the (capsule-external) magnetic field vector, the known temporal course of the magnetic field vector indicates at least the direction and velocity of the capsule movement, in particular the 'missing coordinates', ie the rotation about an axis of the capsule, preferably the longitudinal axis ,
- the measurements may drift. Therefore, it is advantageous if, after a certain number of recordings or measurements, the initial permanent magnet alignment is repeated.
- the rotational position is then preferably determined by an image comparison of at least two images taken at different times by the camera, in particular by a superimposition of the images.
- the rotation sensor can also have a magnetic field sensor whose field-scanning direction is in particular substantially perpendicular to the longitudinal axis L of the capsule endoscope.
- the time of recording / the measurement is recorded.
- the angle of rotation between z By superimposing or comparing successive images / measurements, the angle of rotation between z. For example, two consecutive images / measurements can be determined knowing the rotation of the magnetic field at the times of the two consecutive images / measurements. The direction of rotation can then be incorporated into the information about the image / measured value rotation, and the ambiguous With regard to a full rotation (corresponding modulo 360 °) can be removed.
- the endoscope system is equipped with a guide means, in particular guide magnets, for guiding a, in particular magnetically guided, capsule endoscope, which is set up to run the method according to one of the above claims.
- the endoscope capsule is particularly advantageously connected to a measured value detection device of the endoscope system, wherein the measured value detection device is adapted to record successive measurement signals from the endoscope capsule, such as the images of a camera or magnetic field measured value signals of the magnetic field sensor, recording the detection time. It is also set up to superimpose or compare the successive outputs of the rotation sensor (images / measured value signals).
- the external guide magnet is coupled to a control device of the endoscope system.
- the control device ensures that the correct currents flow in the individual coils of the electromagnet over time.
- the control device ensures that the correct currents flow in the individual coils of the electromagnet over time.
- the control device ensures the correct movement over time or positioning of the at least one permanent magnet of the guide magnet.
- the control device is further configured to compare the - as described above, for example - experimentally determined rotational position with a numerically determined rotational position.
- the numerically determined rotational position can be obtained, for example, from a numerical model or a numerical simulation simulating the endoscope capsule during operation.
- the control device is set up for the numerical model to run on it.
- the endoscope capsule can be designed not only as an autonomous, wireless system, but also as a movable head or as a movable tip of a catheter or tube.
- the field of application is not limited to performing minimally invasive diagnoses, i. visual inspections and / or sampling inside animals or animals.
- the endoscope capsule can be used as a therapeutic tool, e.g. for targeted, local drug application, or as a diagnostic tool in piping systems.
- the endoscope capsule may also, for example, a lighting device, for.
- a lighting device for.
- LED for environment illumination
- a sampling device for additional sensors and / or processing instruments and so on.
- the invention is shown schematically in more detail in the following embodiment.
- FIG. 3 shows a flow chart for driving the guide magnet 2 according to FIG. 1;
- FIG. 1 shows a structure of a system 1 for endoscope control with a guide magnet 2 for the magnetic guidance of an endoscope capsule.
- the guide magnet 2 is connected for operation with power amplifiers 3 and a cooling system 4.
- the cooling system 4 and the guide magnet 2 are further connected to a temperature monitoring system 5 for temperature monitoring.
- the guiding magnet control unit 10 is connected via digital and / or analog data interfaces to the power amplifiers 3, to the temperature monitoring system 5, optionally to a magnetic field measuring unit 6, optionally to a patient table control unit 7, with the position measuring control unit 15 and with the image data receiver 9 and the image processing and display unit 18.
- the guide magnet control unit 10 is further coupled via at least one digital data interface with a central data storage unit 20 as well as with a graphical user interface 22.
- the digital interfaces can be configured as Ethernet connection, CAN bus, RS-232, RS-422, RS-485 or similar.
- An input unit 24 is part of the guide magnet control unit 10 or connected to the latter.
- the endoscope system 1 is controlled, in particular a current flow through the guide magnet 10, which can also consist of a plurality of, in particular independently controllable, individual magnet as a magnet system.
- a mechanical movement model of the endoscope or the endoscope capsule runs on the control unit 10.
- measuring signals for position detection of the endoscope capsule are received by the transceiver 8 of the position measuring system and converted by the position measuring control unit 15 into a 5D capsule position.
- These 5D capsule position measurement values are generated at a clock rate of, for example, 91 Hz and forwarded to the control unit 10.
- measured values from the capsule are received by the image data receiver 9 at a clock rate of 2 Hz or 4 Hz.
- the data transmission takes place by radio with a carrier frequency of eg 433 MHz.
- either the image processing and display unit 18 or the guide magnet control unit 10 calculates a rotation angle of the endoscope capsule, in particular below
- the control unit 10 is further configured to derive a correction of the numerically calculated values from a comparison of at least approximately simultaneous measurement and calculation values of the rotational position and possibly other coordinates of the endoscope capsule and to convert this correction into a corresponding adaptation of the current or the currents through the guide magnet 2 implement, for.
- the control unit 10 is adapted to adjust from the comparison of calculated and measured capsule positions values of model parameters for even more realistic simulation of the capsule movement, in particular a friction coefficient.
- FIG. 2 shows an endoscope capsule 25 of a capsule endoscope.
- a permanent magnet 27 is housed, the magnetization direction is indicated by the arrow.
- the capsule 25 can be aligned, for example, at a sufficiently strong external magnetic field.
- a high-frequency antenna 28 for transmitting and receiving 433 MHz signals and a 433 MHz radio-frequency transmitter 29 are housed. Adjacent thereto are two batteries 30 for supplying power to the capsule 25.
- a hollow-cylindrical LC marker coil 31 for the electromagnetic 5D capsule position measurement is present on a circumferential housing section spaced from permanent magnets 27.
- the housing comprises at one end a camera controller 32 which has an image compression capability and, coupled thereto, a CMOS sensor 33 with a lens 34 and LEDs for illuminating the field of view.
- the housing 26 is transparent in the field of view of the CMOS image sensor 33. designed here by means of a transparent hood or dome 35.
- the optical axis of the camera 33,34,35 and the CMOS sensor 33 substantially corresponds to the longitudinal axis L of the endoscope capsule 26.
- the camera 33,34,35 is here additionally as Rotation sensor used.
- the magnetization direction of the permanent magnet 6 may also be different in other embodiments than perpendicular to the longitudinal axis L.
- the capsule is preferably swallowable or rectally einschreibbar. If the capsule is to be swallowable, smaller outer mass than in a capsule to be inserted rectally preferred, with an outer diameter of at most about 11 mm and a maximum length of about 30 mm.
- FIG. 3 shows a flow chart for controlling the guide magnet 2 from FIG. 1. This can be implemented, in particular in the guide magnet control unit 10 of FIG. B. in software, firmware and / or hardware, or on a disk, z. B. a hard disk or a DVD.
- a setpoint force and a setpoint torque are input via the input unit 24 from FIG. From this, in a following step S2, the desired coil currents are calculated, which are to flow through the guide magnet 2 for this purpose.
- the values of the desired coil currents are used in a following step S3 together with detected temperature measured values to limit the coil current z. B. to avoid overheating to determine.
- the resulting actual coil currents, which are output to the power amplifiers 3, are used in a step S4 for calculating the actual forces and actual torques.
- the calculation of the actual forces and actual torques takes place in the control unit 10 by means of a numerical movement model of the capsule.
- the actual forces and the actual torques are used in step S5 to calculate the 6D capsule position, ie including the rotational position of the capsule about its longitudinal axis.
- the calculation of the 6D capsule position begins with an initiation from the 5D measurement and the "initial permanent magnet alignment"; For this purpose, a magnetic field is generated at the location of the endoscopic capsule, which is strong enough to align the capsule at least sufficiently accurately with the magnetic field. Due to the calculation of the capsule position in all 6 dimensions, which takes place model-based in the control unit 10, a rotational position can also be output in rapid succession ('quasi-continuous').
- step S6 the 6D capsule position calculated in a computer-aided model-based manner in step S5 is compared with the measured capsule position, in particular with approximately simultaneously measured 5D position values of the LC marker coil 31 and rotational position measurement values determined by a rotation sensor in the capsule.
- the rotational position measured values result, for example, from a comparison of time-shifted images of the capsule camera.
- a corrected 6D capsule position which is used as a correction variable for the calculation of the desired coil currents in step S2 is determined from the comparison.
- corrections are determined from the deviations for the capsule motion model on which the calculation of the 6D capsule position in S5 is based.
- the calculated capsule position can be adjusted or corrected only by means of the measured 5D capsule position (without the rotational position), which results in further increased guidance accuracy.
- the execution of the procedure according to FIG. 3, i. the calculation of 6D capsule positions and the output of actual coil currents to the power amplifiers 3 is done at a clock rate of e.g. 100 Hz.
- This clock rate is typically significantly higher than the clock rate of the rotation sensor and also differs from the clock rate of the position measurement control unit.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Optics & Photonics (AREA)
- Robotics (AREA)
- Human Computer Interaction (AREA)
- Endoscopes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007051861.9A DE102007051861B4 (de) | 2007-10-30 | 2007-10-30 | Verfahren zur Führung eines Kapsel-Endoskops und Endoskopsystem |
| PCT/EP2008/063778 WO2009056441A1 (de) | 2007-10-30 | 2008-10-14 | Verfahren zur führung eines kapsel-endoskops und endoskopsystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2205141A1 true EP2205141A1 (de) | 2010-07-14 |
Family
ID=40273504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08843493A Ceased EP2205141A1 (de) | 2007-10-30 | 2008-10-14 | Verfahren zur führung eines kapsel-endoskops und endoskopsystem |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20110046443A1 (de) |
| EP (1) | EP2205141A1 (de) |
| JP (1) | JP5222367B2 (de) |
| CN (1) | CN101842043B (de) |
| DE (1) | DE102007051861B4 (de) |
| WO (1) | WO2009056441A1 (de) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5042037B2 (ja) * | 2005-12-27 | 2012-10-03 | オリンパスメディカルシステムズ株式会社 | カプセル型医療装置誘導システム |
| WO2008095003A2 (en) * | 2007-01-31 | 2008-08-07 | Hadasit Medical Research Services And Development Ltd. | Magnetic levitation based devices, systems and techniques for probing and operating in confined space, including performing medical diagnosis and surgical procedures |
| EP2353489A4 (de) * | 2008-11-28 | 2015-11-25 | Olympus Corp | System zum führen einer verkapselten medizinischen vorrichtung |
| DE102010003808A1 (de) * | 2010-04-09 | 2011-10-13 | Siemens Aktiengesellschaft | Endoskop |
| CN103370001B (zh) * | 2010-12-30 | 2016-12-21 | 基文影像公司 | 基于体内捕捉的图像流自动导航胶囊的系统和方法 |
| US20130267788A1 (en) * | 2012-04-04 | 2013-10-10 | Ankon Technologies Co. Ltd. | System and Method for Orientation and Movement of Remote Objects |
| CN102860810B (zh) * | 2012-10-08 | 2014-10-29 | 安翰光电技术(武汉)有限公司 | 一种医用磁性胶囊内窥镜系统 |
| CN103340595B (zh) * | 2013-07-03 | 2015-08-26 | 安翰光电技术(武汉)有限公司 | 一种无线胶囊内窥镜及其电源控制方法 |
| US10070932B2 (en) | 2013-08-29 | 2018-09-11 | Given Imaging Ltd. | System and method for maneuvering coils power optimization |
| KR102061263B1 (ko) * | 2017-07-21 | 2020-01-02 | 주식회사 우영메디칼 | 전자기 코일시스템 제어 장치 및 방법 |
| CN108451490B (zh) * | 2018-01-29 | 2020-08-25 | 重庆金山医疗器械有限公司 | 一种在消化腔体内搜寻胶囊内窥镜的系统及方法 |
| CN110809425B (zh) * | 2018-06-02 | 2022-05-27 | 上海安翰医疗技术有限公司 | 胶囊内窥镜控制设备 |
| EP3666163B1 (de) * | 2018-12-10 | 2023-02-01 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Verfahren zur gleichzeitigen kalibrierung für ein magnetisches lokalisierungs- und betätigungssystem |
| CN109708851B (zh) * | 2018-12-27 | 2021-06-08 | 重庆大学 | 一种胶囊内窥镜动态成像性能检测系统 |
| CN113017542A (zh) * | 2019-12-25 | 2021-06-25 | 江苏势通生物科技有限公司 | 磁性螺旋型胶囊内镜、磁性螺旋型胶囊内镜控制系统及其控制方法 |
| CN111956176B (zh) * | 2020-09-21 | 2024-11-22 | 上海睿触科技有限公司 | 一种磁场驱动结肠镜胶囊装置 |
| CN113288008B (zh) * | 2021-05-25 | 2023-07-18 | 湖北大学 | 一种磁性胶囊内窥镜全姿态测定方法 |
| KR102601095B1 (ko) * | 2021-11-05 | 2023-11-13 | 서울대학교산학협력단 | 최소 상한 노름 전류해를 이용한 자기장 합성 제어장치 |
| CN118750051B (zh) * | 2024-08-16 | 2024-12-17 | 西安国际医学中心有限公司 | 消化内镜下的无创活检取样装置和系统 |
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| US20030229268A1 (en) * | 2002-04-08 | 2003-12-11 | Olympus Optical Co., Ltd. | Encapsulated endoscope system in which endoscope moves in lumen by itself and rotation of image of region to be observed is ceased |
| US20050062562A1 (en) * | 2003-09-19 | 2005-03-24 | Gunter Ries | Magnetically navigable device with associated magnet element |
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| EP2016897A1 (de) * | 2006-04-21 | 2009-01-21 | Olympus Medical Systems Corp. | Medizinprodukt-führungssystem und verfahren zur korrektur seiner position |
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| US6311082B1 (en) * | 1997-11-12 | 2001-10-30 | Stereotaxis, Inc. | Digital magnetic system for magnetic surgery |
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2007
- 2007-10-30 DE DE102007051861.9A patent/DE102007051861B4/de not_active Expired - Fee Related
-
2008
- 2008-10-14 EP EP08843493A patent/EP2205141A1/de not_active Ceased
- 2008-10-14 CN CN2008801139353A patent/CN101842043B/zh not_active Expired - Fee Related
- 2008-10-14 US US12/740,799 patent/US20110046443A1/en not_active Abandoned
- 2008-10-14 WO PCT/EP2008/063778 patent/WO2009056441A1/de not_active Ceased
- 2008-10-14 JP JP2010530398A patent/JP5222367B2/ja not_active Expired - Fee Related
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| US20030229268A1 (en) * | 2002-04-08 | 2003-12-11 | Olympus Optical Co., Ltd. | Encapsulated endoscope system in which endoscope moves in lumen by itself and rotation of image of region to be observed is ceased |
| US20050093544A1 (en) * | 2003-09-05 | 2005-05-05 | Gunter Ries | System for contactless moving or holding magnetic body in working space using magnet coil |
| US20050062562A1 (en) * | 2003-09-19 | 2005-03-24 | Gunter Ries | Magnetically navigable device with associated magnet element |
| DE102005032577A1 (de) * | 2005-07-11 | 2007-01-25 | Siemens Ag | Verfahren zur Positionsbestimmung eines Endroboters |
| EP2016897A1 (de) * | 2006-04-21 | 2009-01-21 | Olympus Medical Systems Corp. | Medizinprodukt-führungssystem und verfahren zur korrektur seiner position |
Non-Patent Citations (1)
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009056441A1 (de) | 2009-05-07 |
| DE102007051861A1 (de) | 2009-05-20 |
| JP2011500239A (ja) | 2011-01-06 |
| JP5222367B2 (ja) | 2013-06-26 |
| DE102007051861B4 (de) | 2020-03-12 |
| CN101842043B (zh) | 2012-08-22 |
| CN101842043A (zh) | 2010-09-22 |
| US20110046443A1 (en) | 2011-02-24 |
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