WO1996032064A1 - Configuration pour element d'imagerie par circuit a couplage de charge en radiographie intra-orale - Google Patents

Configuration pour element d'imagerie par circuit a couplage de charge en radiographie intra-orale Download PDF

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Publication number
WO1996032064A1
WO1996032064A1 PCT/SE1996/000420 SE9600420W WO9632064A1 WO 1996032064 A1 WO1996032064 A1 WO 1996032064A1 SE 9600420 W SE9600420 W SE 9600420W WO 9632064 A1 WO9632064 A1 WO 9632064A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible
thin
flat cable
cable portion
screened
Prior art date
Application number
PCT/SE1996/000420
Other languages
English (en)
Inventor
Per Nelvig
Original Assignee
Afp Imaging Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Afp Imaging Corporation filed Critical Afp Imaging Corporation
Priority to EP96910261A priority Critical patent/EP0825832A1/fr
Priority to AU53506/96A priority patent/AU5350696A/en
Priority to JP8530943A priority patent/JPH11502055A/ja
Publication of WO1996032064A1 publication Critical patent/WO1996032064A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • A61B6/512—Intraoral means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0861—Flat or ribbon cables comprising one or more screens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4423—Constructional features of apparatus for radiation diagnosis related to hygiene or sterilisation

Definitions

  • the present invention relates to intraoral registration of X-ray images of teeth and particularly to a flexible cable portion for connecting electric signals to and from a CCD imaging element for
  • the detector Depending on the X-ray absorption of the object (the tooth) , a varying amount of radiation reaches the detector.
  • the radiation that reaches the detector creates electrical signals that are proportional to the received dose at the different areas of the detector.
  • By applying a series of clock pulses to the detector the image signals from the detector are possible read out.
  • the only practical way to apply those clock pulses for reading the signals out is to use an electrical cable containing several conductors. Since the CCD detector is unable to store the image information for more than about 1 second, this readout has to be done with the detector still positioned in the mouth. For practical reasons, it is obvious that it is essential that the connecting cable is as thin and flexible as possible.
  • a cable for driving and reading a CCD detector is required to contain a sufficient number of conductors to drive all the clock phases and to supply the different bias voltages needed for the operation of the CCD.
  • a standard 3-phase CCD very often requires up to 12 wires. This easily makes the cable bulky and impractical for some of the traditional intraoral projections.
  • One such projection is the so called “bitewing projection” where the film is placed behind the arches of teeth with the help of a thin film holder that keeps the film in place by letting the patient bite on the holder.
  • the holder is sufficiently thin to allow a gap, approximately less than 2 mm, between the occlusal surfaces of the teeth.
  • the purpose of the projection is to enable visualization of the crowns and the marginal bone of both the upper jaw and the lower jaw simultaneously. Such images are used for both caries and periodontal lesion detection.
  • the sensitive area is from practical reasons, usually smaller than a 3 x 4 cm analog film. This smaller size results in a smaller tolerance for display of the marginal bone in bitewing images. A thick cable results in a wider gap between the teeth, resulting in an even smaller tolerance.
  • To use a sensor with a sensitive area of 2 x 3 cm and a 5 mm thick cable for "bitewing ⁇ " is considered to be impossible by many users.
  • Flat cables also provide very efficient production methods Since they have a very precise layout, the spacing between the conduc ⁇ tors is well known, whereby it will be possible to connect several conductors in one single production operation, either automatically or manually while a conventional cable requires one or more operations for each conductor.
  • the present invention discloses a particular thin flexible protected screened flat cable portion for connection of an intraoral X-ray sensor to its external electronic controller
  • a first object is to produce a flexible screened multi-wire flat cable portion and according to the present invention a flexible screened multi- wire flat cable portion device which can be passed through a very narrow gap between the teeth of the upper and lower jaws for producing "bitewing" images, as well as periapical images with or witnout the use of a bite-block, by means of an intraoral X- ray CCD sensor, this flexible screened flat multi-wire cable permitting sharp bending m different angles relative to the sensor with a very short bending radius and having a very long lifetime for bendings with a small bending radius
  • a second object introduces, according to a method and device of the present invention, a sliding film between the screened flat multi-wire cable and an outer protecting mantle to further increase the flexibility of the flexible screened multi-wire flat cable portion.
  • a third object of the present invention is to use the flexible screened flat multi-wire cable portion in a system including a CCD sensor.
  • Furter embodiments are additionally defined by a number of different dependent claims.
  • Fig. 1 is a horisontal plane view cut through a image sensor capsule utilizing the flat cable portion according to the present invention
  • Fig. 2 is a horisontal plane view cut through a image sensor capsule of Fig. 1 with the image sensor protective case removed;
  • Fig. 3 is an enlarged portion of Fig. 2;
  • Fig. 4 is an elevated side view along a cut A - A of the image sensor and its flat cable sensor of Fig. 2;
  • Fig. 5 is a cross section along a cut B - B in Fig. 1 of the flat cable portion according the present invention.
  • the conductors in a cable 3 are made of metal foil, e.g. copper, laminated between very thin (preferably ⁇ 0.2 mm) layers of high quality plastic, for example polyimide forming a flat conductor cable 13.
  • metal foil e.g. copper
  • very thin layers of high quality plastic for example polyimide
  • Figs. 1 and 2 are demonstrated a cross section of a CCD image sensor capsule and its connecting cable 3.
  • the layout of the conductors in this flat cable 13 is manufactured in a way similar to the production of printed circuit boards.
  • the CCD sensor 2 Since, in this application, a large area, 3-phase CCD sensor 2 is supposed to be driven through the flat conductor cable 13, a sequence of high frequency (appr. 1 MHz) pulses will be applied, in the preferred embodiment, to up to seven of the conductors at a second end of this cable portion which is, for instance, about 40 cm long.
  • the CCD sensor 2 At a first end of the cable portion, the CCD sensor 2 represents a relatively high capacitive load. This means that electrical current pulses in the conductors can reach levels where a significant amount of radio frequency radiation will be emitted. To prevent this radiation to escape to the environment an electrical screen is necessary.
  • the screen 10 is spun into two crosswise layers onto the plastic-metal-plastic laminate constituting the flat conductor cable 13.
  • the screen 10 could be manufactured by rotating the flat cable portion, held under tension by two jaw chucks that can be synchroneously rotated, simultaneously feeding a thin electrically conductive wire onto the cable in such a way that two crosswire layers of this wire
  • the screen 10 could be provided by spinning a single, overlapping layer of thin metal foil tape with a method similar to what is described above.
  • strips of thin metal foil placed on each side of the flat cable could provide the screening function.
  • a thin layer of friction reducing material is placed between each of the screening strips and the cable to maintain high flexibility.
  • an outer polyurethane mantle 14 is pulled over the cable/screen assembly to prevent the cable from moderate bite-forces when used for "bitewing” imaging, and to provide an electrical insulation besides protecting the cable from saliva and disinfectant solutions.
  • the high quality plastic carrier is approximately 8 mm wide and carries 14 conductors and the spun screen 10 is covered with a sliding film 12, for instance, of PTFE (polytetraflourethylene) or the like, between the screened flat cable 13 and the outer thin mantle 14 of polyurethane to increase the flexibility of the resulting insulated, protected cable 3.
  • the flat cable is connected to a CCD sensor and at a second end it is connected to a conventional cable that leads to an electronics box that controls the CCD sensor.
  • the conventional cable is screened, and may be several meters of length. The transition from the flat cable to the conventional cable is conveniently performed, for example, by means of standard connector plugs. Therefore, the electronics box can be disposed several meters away from working area close to the patient .
  • the feed-through must provide the following functions:
  • the feed-through is designed as an end-piece 4, that also serves as the final seal of the package.
  • this end-piece 4 is composed of two halves that are put together around the cable. The two halves can be held together using an adhesive resin or cured resin and possibly reinforced by small dimension screws and nuts which is common in similar devices.
  • this end-piece 4 could be formed around the cable by injection molding.
  • fixation of the cable to the end- piece 4 is provided by first laminating a thin reinforcement of fibreglass laminate to the cable. During final assembly this reinforcement is fitted into a slot of the end-piece 4 and the passage through the end-piece is sealed by the use of, for instance, adhesive resin.
  • the polyimide base of the cable could be locally widened and perforated at the passage through the end- piece to allow attachment to the end piece through mechanical locking. It should also be emphasised that the passage through the package could be arranged in similar manners at any part of the package.
  • a flexible printed circuit board, PCB, being integrated into the interior of the sensor package is about 23 * 50 mm as demonstrat ⁇ ed in Fig. 4 in an illustrative embodiment.
  • This PCB is used for electronic circuitry components such as drivers for the CCD clock phases and triggering circuitry detector amplifiers. The reason for including such circuitry into the package is that radio frequency interference emissions can be reduced.
  • This flexible PCB is in a preferred embodiment folded into a double sandwich 6 before final assembly of the sensor, cable and package.
  • a sensor carrier 5 is soldered to the flexible folded board 6 which then is integral with the cable portion 3 of a preferred embodi ⁇ ment.
  • the CCD image element 2 is than put onto the carrier 5 and connected to to the circuitry of the flexible board 6, which is integral with the flat cable 13 in the mantle 14 och the connecting cable 3.
  • the housing is completed by adding a case portion l to the end-piece 4 thereby sealed enclosing the image sensor into a capsule. Such an embodiment makes the connection to the sensor itself very straightforward.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Dentistry (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

Portion de câble (3) plate, blindée, souple et mince destinée au raccordement d'un capteur de radiographie intra-orale (2) à son dispositif de commande électronique externe. Une portion de câble plate, à plusieurs brins, blindée, souple, peut être introduite dans l'interstice très étroit entre les dents de la mâchoire supérieure et celle de la mâchoire inférieure pour produire des images sur film à aile mordue ainsi que des images péri-apicales avec ou sans pièce de morsure grâce à un capteur à circuit à couplage de charge pour radiographie intra-orale. Ce câble multi-brins plat, blindé et souple (3) peut admettre une courbure aigue sous différents angles par rapport à la capsule captrice (1) selon un rayon de courbure très court; il présente en outre une durée de service prévisible de plusieurs dizaines de milliers de courbures sous un rayon très faible.
PCT/SE1996/000420 1995-04-10 1996-03-29 Configuration pour element d'imagerie par circuit a couplage de charge en radiographie intra-orale WO1996032064A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96910261A EP0825832A1 (fr) 1995-04-10 1996-03-29 Configuration pour element d'imagerie par circuit a couplage de charge en radiographie intra-orale
AU53506/96A AU5350696A (en) 1995-04-10 1996-03-29 Arrangement for intraoral x-ray ccd imaging element
JP8530943A JPH11502055A (ja) 1995-04-10 1996-03-29 口内ｘ線ｃｃｄ撮像素子のための装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9501332A SE9501332L (sv) 1995-04-10 1995-04-10 Anordning vid CCD-cell
SE9501332-2 1995-04-10

Publications (1)

Publication Number Publication Date
WO1996032064A1 true WO1996032064A1 (fr) 1996-10-17

Family

ID=20397916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000420 WO1996032064A1 (fr) 1995-04-10 1996-03-29 Configuration pour element d'imagerie par circuit a couplage de charge en radiographie intra-orale

Country Status (5)

Country Link
EP (1) EP0825832A1 (fr)
JP (1) JPH11502055A (fr)
AU (1) AU5350696A (fr)
SE (1) SE9501332L (fr)
WO (1) WO1996032064A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1482838A1 (fr) * 2002-02-08 2004-12-08 Schick Technologies, Inc. Positionnement de systeme de radiographie dentaire au moyen d'adhesifs
US7781674B2 (en) 2006-11-28 2010-08-24 Dorothy Kassab Protective housing for wires
US8119990B2 (en) 2008-10-27 2012-02-21 Imaging Sciences International Llc System and method of X-ray detection with a sensor
US8366318B2 (en) 2009-07-17 2013-02-05 Dental Imaging Technologies Corporation Intraoral X-ray sensor with embedded standard computer interface
US20130129044A1 (en) * 2011-11-18 2013-05-23 Cyber Medical Imaging, Inc. Intraoral Radiographic Imaging Sensors with Minimized Mesial Imaging Dead Space
JP2013208383A (ja) * 2012-03-30 2013-10-10 Hamamatsu Photonics Kk 口腔内センサの製造方法
US20140023177A1 (en) * 2012-07-17 2014-01-23 Cyber Medical Imaging, Inc. Intraoral Radiographic Sensors with Cables Having Increased User Comfort and Methods of Using the Same
US9295436B2 (en) 2013-06-06 2016-03-29 Hamamatsu Photonics K.K. Method for manufacturing intraoral sensor
US9492129B2 (en) 2008-10-27 2016-11-15 Dental Imaging Technologies Corporation Triggering of intraoral X-ray sensor using pixel array sub-sampling

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4536556B2 (ja) 2005-03-08 2010-09-01 浜松ホトニクス株式会社 Ｘ線撮像装置
JP2006246961A (ja) 2005-03-08 2006-09-21 Hamamatsu Photonics Kk Ｘ線撮像装置
JP4751130B2 (ja) * 2005-08-16 2011-08-17 パナソニック株式会社 画像処理装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120837A (en) * 1982-03-31 1983-12-07 Nippon Mektron Kk Flexible circuit board
US4842373A (en) * 1987-06-15 1989-06-27 Alps Electric Co., Ltd. Connecting structure for connecting a liquid crystal display and a flexible flat cable
WO1991009406A1 (fr) * 1989-12-15 1991-06-27 Lawrence Bruce Ritchie Dispositif de câblage electrique
EP0447946A1 (fr) * 1990-03-20 1991-09-25 ERNST & ENGBRING GmbH Câble électronique
WO1992022188A1 (fr) * 1991-06-03 1992-12-10 Regam Medical Systems Ab Procede et dispositif de declenchement d'un capteur d'images radiographiques
US5378161A (en) * 1993-08-04 1995-01-03 Minnesota Mining And Manufacturing Company Tapered electrical connector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120837A (en) * 1982-03-31 1983-12-07 Nippon Mektron Kk Flexible circuit board
US4842373A (en) * 1987-06-15 1989-06-27 Alps Electric Co., Ltd. Connecting structure for connecting a liquid crystal display and a flexible flat cable
WO1991009406A1 (fr) * 1989-12-15 1991-06-27 Lawrence Bruce Ritchie Dispositif de câblage electrique
EP0447946A1 (fr) * 1990-03-20 1991-09-25 ERNST & ENGBRING GmbH Câble électronique
WO1992022188A1 (fr) * 1991-06-03 1992-12-10 Regam Medical Systems Ab Procede et dispositif de declenchement d'un capteur d'images radiographiques
US5378161A (en) * 1993-08-04 1995-01-03 Minnesota Mining And Manufacturing Company Tapered electrical connector

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1482838A1 (fr) * 2002-02-08 2004-12-08 Schick Technologies, Inc. Positionnement de systeme de radiographie dentaire au moyen d'adhesifs
EP1482838A4 (fr) * 2002-02-08 2007-02-28 Schick Technologies Inc Positionnement de systeme de radiographie dentaire au moyen d'adhesifs
US7781674B2 (en) 2006-11-28 2010-08-24 Dorothy Kassab Protective housing for wires
US9510796B2 (en) 2008-10-27 2016-12-06 Dental Imaging Technologies Corporation Intraoral x-ray sensor with embedded standard computer interface
US8324587B2 (en) 2008-10-27 2012-12-04 Imaging Sciences International Llc Method and system of reducing false triggering of an X-ray sensor
US8119990B2 (en) 2008-10-27 2012-02-21 Imaging Sciences International Llc System and method of X-ray detection with a sensor
US9259197B2 (en) 2008-10-27 2016-02-16 Dental Imaging Technologies Corporation Intraoral x-ray sensor with embedded standard computer interface
US9492129B2 (en) 2008-10-27 2016-11-15 Dental Imaging Technologies Corporation Triggering of intraoral X-ray sensor using pixel array sub-sampling
US8366318B2 (en) 2009-07-17 2013-02-05 Dental Imaging Technologies Corporation Intraoral X-ray sensor with embedded standard computer interface
US20130129044A1 (en) * 2011-11-18 2013-05-23 Cyber Medical Imaging, Inc. Intraoral Radiographic Imaging Sensors with Minimized Mesial Imaging Dead Space
EP2594202A3 (fr) * 2011-11-18 2013-08-14 Cyber Medical Imaging, Inc. Capteurs d'imagerie de radiographie intra-orale avec un minimum d'espace mort d'imagerie mésiale
AU2012251928B2 (en) * 2011-11-18 2016-04-14 Cyber Medical Imaging, Inc. Intraoral Radiographic Imaging Sensors With Minimized Mesial Imaging Dead Space
EP2801321A3 (fr) * 2011-11-18 2014-12-10 Cyber Medical Imaging, Inc. Capteurs d'imagerie de radiographie intra-orale avec un minimum d'espace mort d'imagerie mésiale
JP2013208383A (ja) * 2012-03-30 2013-10-10 Hamamatsu Photonics Kk 口腔内センサの製造方法
US9357972B2 (en) * 2012-07-17 2016-06-07 Cyber Medical Imaging, Inc. Intraoral radiographic sensors with cables having increased user comfort and methods of using the same
US20140023177A1 (en) * 2012-07-17 2014-01-23 Cyber Medical Imaging, Inc. Intraoral Radiographic Sensors with Cables Having Increased User Comfort and Methods of Using the Same
US9295436B2 (en) 2013-06-06 2016-03-29 Hamamatsu Photonics K.K. Method for manufacturing intraoral sensor

Also Published As

Publication number Publication date
AU5350696A (en) 1996-10-30
SE9501332D0 (sv) 1995-04-10
SE9501332L (sv) 1996-10-11
JPH11502055A (ja) 1999-02-16
EP0825832A1 (fr) 1998-03-04

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