WO2006109802A1 - X線ct撮影用ユニットおよびx線撮影装置 - Google Patents
X線ct撮影用ユニットおよびx線撮影装置 Download PDFInfo
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- WO2006109802A1 WO2006109802A1 PCT/JP2006/307663 JP2006307663W WO2006109802A1 WO 2006109802 A1 WO2006109802 A1 WO 2006109802A1 JP 2006307663 W JP2006307663 W JP 2006307663W WO 2006109802 A1 WO2006109802 A1 WO 2006109802A1
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- ray
- imaging
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- 238000003384 imaging method Methods 0.000 title claims abstract description 72
- 238000013170 computed tomography imaging Methods 0.000 claims abstract description 83
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 17
- 235000002198 Annona diversifolia Nutrition 0.000 claims description 9
- 241000282842 Lama glama Species 0.000 claims description 9
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- 230000007246 mechanism Effects 0.000 description 18
- 238000003325 tomography Methods 0.000 description 9
- 230000003028 elevating effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 210000004513 dentition Anatomy 0.000 description 5
- 238000002601 radiography Methods 0.000 description 5
- 230000036346 tooth eruption Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
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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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
-
- 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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
-
- 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
-
- 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
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/548—Remote control of the apparatus or devices
Definitions
- the present invention relates to medical X-ray photography for dentistry, otolaryngology and the like.
- a dental device includes a panoramic X-ray imaging device that captures the entire dentition and its vicinity at the same time, a cephalo X-ray imaging device that images the entire patient's head for orthodontic treatment, and a part of the dentition.
- a cephalo X-ray imaging device that images the entire patient's head for orthodontic treatment, and a part of the dentition.
- X-ray CT system that uses a cone beam X-ray.
- linear tomography can be performed to take a cross section of the dentition.
- the X-rays used in these various X-ray imaging devices include those in a long and narrow irradiation field such as CV imaging, cones in CT imaging, and the like. Various things, such as a beam, are used.
- Sensors used in X-ray equipment include two-dimensional sensor panels such as X-ray film, X-ray image intensifier, CCD sensor, and MOS sensor. The specifications of the X-ray source and X-ray sensor and their turning conditions differ for each radiography.
- the rotation axis is moved along a predetermined trajectory so that the position of the X-ray source and X-ray sensor is always applied to the dentition from the positive direction.
- the X-ray film is imaged with an X-ray digital sensor.
- X-ray CT imaging for example, a cone beam is irradiated onto a subject while a turning arm arranged with an X-ray source and an X-ray sensor facing each other, and a projection is detected by a digital sensor.
- the panoramic X-ray system can be used in combination with a digital sensor cassette with only a slight modification to the NOV llama X-ray system that uses a film cassette.
- a digital sensor cassette is installed instead of a film cassette, a shooting mode corresponding to the cassette is automatically selected, and shooting conditions in that mode can be set. Then, photographing is performed while supplying a control signal to the digital sensor cassette.
- Patent Document 1 JP-A-9 135829
- Patent Document 2 Japanese Patent Laid-Open No. 11-104127
- panoramic (Z-cephalo) imaging apparatuses are widely used.
- a doctor looks at a panoramic X-ray photograph obtained with a V-Lama imaging device and wants to see a tomographic image of a certain part, for example, using an X-ray CT imaging apparatus, a tomographic image of that part is obtained. It is done.
- the X-ray CT imaging apparatus is expensive, it is not always possible to use the X-ray CT imaging apparatus. Therefore, it is desirable to be able to perform X-ray CT imaging with a simple modification using the NOV llama imaging system.
- the X-ray source and X-ray sensor specifications and imaging conditions differ depending on the type of radiography, it would not be possible to take an image simply by replacing the X-ray sensor.
- An object of the present invention is to make it possible to easily perform X-ray CT imaging based on an X-ray imaging apparatus that obtains a V-llama tomographic image.
- a first X-ray CT imaging unit is a panorama imaging system including a film cassette including an X-ray film and an electrical X-ray image detector for capturing z or panoramic image data.
- This is a unit for X-ray CT imaging that is installed in a V-Rama X-ray imaging system that has a cassette holder to which any of the digital sensor cassettes can be installed.
- This V Lama X-ray The imaging apparatus further includes an X-ray generator and an X-ray detector arranged opposite to each other with the subject interposed therebetween, and the X-ray generator and the X-ray detector with respect to the subject. Swiveling means that rotates relative to each other while maintaining the opposed state.
- the X-ray CT imaging unit includes a two-dimensional X-ray detector that acquires X-ray projection data for CT imaging of a subject, a digital sensor force set for CT imaging that can be attached to the cassette holder, and X X-ray irradiation timing for X-ray CT imaging, an X-ray beam irradiation field generated by the X-ray generator, and control means for controlling the turning means.
- the X-ray CT imaging unit further calculates an image reconstruction for converting the X-ray projection data obtained by the two-dimensional X-ray detector into an X-ray absorption coefficient distribution of the subject.
- the second X-ray CT imaging unit includes a film cassette with an X-ray film and a digital sensor for panoramic imaging with an electrical X-ray image detector for taking Z or panoramic image data.
- This is a unit for X-ray CT imaging that is installed in a No-V llama X-ray imaging device that has a cassette holder that can be fitted with any of the cassettes.
- This X-ray llama X-ray imaging apparatus includes an X-ray generator and an X-ray detector disposed opposite to each other with a subject interposed therebetween, and the X-ray generator and the X-ray. Swiveling means that rotates relative to the object while keeping the detection unit facing the object.
- the X-ray CT imaging unit includes a two-dimensional X-ray detector for acquiring X-ray projection data for CT imaging of a subject, and a digital sensor force set for CT imaging that can be attached to the cassette holder; Image reconstruction means for calculating tomographic image data of the tomographic plane of the subject by calculating image reconstruction by converting the X-ray projection data obtained by the two-dimensional X-ray detector into the distribution of the X-ray absorption coefficient of the subject And a signal for X-ray CT imaging is transmitted between the two-dimensional X-ray detector and the image reconstruction means when the CT imaging digital sensor cassette is mounted on the cassette holder. Signal processing means for receiving.
- irradiation field switching means for switching an irradiation field of an X-ray beam generated by the X-ray generator includes the X-ray generator.
- the irradiation field switching means is switched when the CT imaging digital sensor cassette is mounted on the cassette holder mounted on the two-dimensional X-ray detector side.
- the first or second X-ray CT imaging unit further includes a switching switch, a jack into which a pin can be inserted, an engaging portion that engages with a limit switch on the cassette holder side, an IC tag, It is equipped with mounting response means that is a deviation between the barcode and the IC chip.
- the two-dimensional X-ray detector is a MOS sensor, a CM OS sensor, a TFT sensor, an X-ray solid-state imaging device, or an FT sensor.
- the X-ray detector and X-ray solid-state imaging device that use the shift are the shifts.
- the first or second digital imaging cassette for CT imaging further includes a two-dimensional X-ray detector for CT imaging function, and further for a no-llama imaging function. It incorporates an X-ray detector that is longer than the two-dimensional X-ray detector.
- this digital sensor cassette is provided with two different two-dimensional X-ray detectors, and can be set to the imaging position according to the imaging mode.
- An X-ray imaging apparatus is a cassette in which a film cassette incorporating an X-ray film or a panoramic imaging digital sensor cassette incorporating an electrical X-ray image detector for photographing panoramic image data can be attached.
- the rotation means that rotates relatively while maintaining the state, and the first or second X-ray CT imaging unit that can be mounted in place of the film cassette or the digital sensor cassette.
- the digital sensor cassette for CT imaging and the image reconstruction means and signal processing means therefor can be exchanged together. X-ray CT imaging is easily possible.
- FIG. 1 Perspective view of panoramic X-ray apparatus
- Figure 2 Cross section of X-ray detector
- FIG. 1 shows a No V Lama X-ray machine.
- a support column 3 is erected on the base 2, and an elevating unit 4 is attached to the support column 3 so as to be able to move up and down, and the swivel arm 5 can be turned on the support 4 It is attached.
- a support arm 4a and a patient frame 4b extending substantially horizontally are provided at the upper and lower ends of the elevating unit 4, respectively.
- the support arm 4a has a built-in XY table that can be freely moved in the X and Y directions by a step motor, and the swivel arm 5 is suspended through this XY table force connecting shaft, and moves in the horizontal plane. Can move arbitrarily.
- the position may be moved using, for example, two arms connected like a drafter.
- the swivel arm 5 is swung with respect to the support arm 4a by a step motor.
- a turning mechanism is provided.
- the turning mechanism can turn the turning arm 5 with respect to a vertical axis while moving the turning center of the turning arm 5 by the XY table.
- the swivel arm 5 extends downward on both sides, and an X-ray generator 6 including an X-ray tube is disposed at one end 5a, and an X-ray detector 7 is opposed to the other end 5b in the horizontal direction. Is provided.
- the housing of the X-ray generator 6 is equipped with an X-ray tube, an X-ray shielding plate having a primary slit in the vertical direction, and an adjusting mechanism for changing the shape of the primary slit.
- the swivel arm 5 and the swivel mechanism form a swivel mechanism, and the X-ray generator and the X-ray detector are placed facing each other with the subject sandwiched between them, and they rotate relative to each other while keeping the state facing the subject.
- a remote control box 13 is connected to the apparatus main body 1 with an operation cord 13a, which includes, for example, a main switch for turning on / off the power and an X-ray irradiation switch.
- the patient frame 4b is provided with a chin rest 4c.
- the patient head presser 4d is provided on the lower surface of the support arm 4a so as to penetrate the turning arm 5, and further includes a position adjusting mechanism.
- the chin rest 4c is also provided with a vertical movement control mechanism.
- a tilt control mechanism for tilting the chin rest 4c is provided.
- the elevating frame 4f and the patient frame 4b of the elevating unit 4 that move up and down with respect to the support column 3 will be described in detail.
- the elevating frame 4f is displaced up and down relative to the support column 3 in accordance with the patient's physique.
- the lifting frame 4f and the patient frame 4b are integrally formed. Therefore, the X-ray generator 6 and the X-ray detector 7 are moved up and down together with the patient frame 4b and the chin rest 4c.
- the above-described patient frame 4b, the X-ray generator 6 and the elevating frame 4f accompanying the elevating of the X-ray detection unit 7 are configured as separate bodies so that each of them is independently displaced with respect to the three columns. It doesn't matter. Further, the X-ray generator 6 may be configured to move up and down with respect to the patient frame 4b or the chin rest 4c.
- Japanese Patent Application Laid-Open No. 7-275240 filed by the present applicant, describes an example in which the above-described patient frame 4b and lifting frame 4f are configured separately, or a patient frame 4b or chin rest 4c. Departure An example in which the living vessel 6 is configured to be displaced is disclosed. In Japanese Patent Laid-Open No.
- a portion corresponding to the above-described patient frame 4b is referred to as a “patient frame”, and a portion corresponding to the lift frame 4 or the lift frame 4f is referred to as a “lift body”.
- the purpose of raising and lowering and tilting is to widen the area that can be imaged, and to adjust the inclination of the irradiation line with respect to the horizontal plane for each imaging region such as the upper jaw and lower jaw, The lower part of the lower jaw, such as the lower jaw tip, is adjusted so that it is well positioned in the center of the irradiation field.
- the X-ray generator 6 is displaced with respect to the configuration in which the chin rest 4c can be moved up and down or tilted, the above-described configuration in which the patient frame 4b and the lifting frame 4f are separated, and the patient frame 4b or the chin rest 4c. It may be possible to make finer adjustments by combining with the above configuration.
- the X-ray detector 7 is provided with a vertical secondary slit 8a corresponding to the primary slit 8a and a shielding plate 8 having an adjustment mechanism facing the X-ray generator 6, behind which is a cassette. Holder 9 is placed.
- the secondary slit 8a includes, for example, a vertically long slit for panoramic radiography (for narrow beam) and a rectangular slit for CT radiography (for wide-area beam).
- the cassette holder 9 is supported by a slide bearing 9a so as to be horizontally movable in a direction perpendicular to the paper surface of FIG. 2, and a drive motor 9b for moving the cassette holder 9 is provided.
- the cassette holder 9 includes a film cassette 21 with X-ray film, a digital sensor force set 22 for panoramic photography with an electrical X-ray image detector for taking panoramic image data, and a digital sensor cassette 20 for CT photography. Either can be installed.
- the X-ray detection unit 7 is provided with a connector 14 for connecting a digital sensor cassette.
- the cassette holder 9 is supported so as to be horizontally movable via a slide mechanism (not shown), and the cassette is moved by a drive motor 9b.
- the X-ray detection unit 7 includes a control unit 11 including a printed circuit board incorporating various circuits behind the cassette holder 9 and an operation panel 12 provided on the surface opposite to the X-ray generator.
- the operation panel 12 (Fig. 7) is equipped with various switches and a liquid crystal display.
- the control unit 11 is further provided with various circuits necessary for using a digital sensor cassette or a two-dimensional sensor cassette.
- the panoramic X-ray imaging apparatus may be a film X-ray imaging apparatus or a digital X-ray imaging apparatus.
- Figure 3 shows the X-ray fill inside the film X-ray machine.
- a conventional film cassette 21 in which a screen is exchangeably stored is illustrated.
- FIG. 4 shows an example of a digital sensor cassette 22 that is used in a digital X-ray imaging apparatus.
- the digital sensor cassette 22 converts incident X-rays into digital data for each pixel arranged two-dimensionally.
- An electrical X-ray detector and various circuits related thereto are provided in the exterior housing 23, and a connector 24 for connection to an external circuit is provided on one side of the housing 23.
- This connector 24 is usually connected to the connector 14 of the X-ray detector 7 with a cable in which a power line and a signal line are integrated, but it can also be used for connection to other external devices such as a personal computer.
- the exterior housing 23 is made of an appropriate material that can provide the required strength, such as a metal such as an aluminum plate or a synthetic resin such as ABS resin.
- an X-ray receiver 25 made of a material that has good transparency to X-rays but blocks visible light, such as dark ABS grease 25 Is provided long in the vertical direction corresponding to the secondary slit 8a, and an electric X-ray image detector is arranged inside thereof.
- FIG. 5 shows a digital sensor cassette 20 that is a unit for X-ray CT imaging.
- An X-ray MOS sensor is used as the digital sensor cassette 20.
- This MOS sensor for X-rays is a MOS image sensor layer arranged in a two-dimensional matrix with a photodiode as a light receiving pixel, a capacitor connected in parallel to it, and a MOS transistor for readout control connected in series with it.
- An optical fiber element that transmits an optical image is placed on top of it, and a scintillator layer that converts X-rays into visible light is formed on the optical fiber element (see, for example, JP-A-8-257026). See the official gazette).
- the M O S sensor functions as a two-dimensional X-ray detector that acquires X-ray projection data for CT imaging of the subject.
- the X-ray image transmitted through the subject is converted into a visible light image in the scintillator layer, and further transmitted to the MOS image sensor layer by the optical fiber element and converted into the electric charge accumulated in the capacitor.
- the charge of the pixel selected by the address conversion circuit is converted into a digital value by the AZD converter.
- the digital sensor cassette 20 includes an electrical two-dimensional X-ray detector and various circuits related thereto in the exterior housing.
- the electrical two-dimensional X-ray detector includes A CMOS sensor using a CMOS transistor instead of a MOS transistor, a TFT sensor using a thin film transistor (TFT), or an FT sensor that performs frame transfer can be used in the same way.
- An X-ray CCD sensor that is an X-ray solid-state image sensor can also be used.
- the digital sensor cassette 20 is provided with a signal processing means (Fig. 7, 108) including a CPU for communication between the two-dimensional X-ray detector and the control unit 11.
- This signal processing means also includes a drive circuit for driving a two-dimensional X-ray detector, an AZD conversion circuit for converting to digital data, a memory for storing digital data, and the like, based on a command from the control unit 11.
- the X-ray detection by the 2D X-ray detector is controlled.
- the digital sensor cassette may also serve as a digital sensor cassette for V-llama shooting.
- a digital sensor cassette for V-llama shooting Up to 20mm of this digital sensor cassette, two different two-dimensional X-ray detectors on one side of one substrate SB, a two-dimensional planar MOS sensor MS for CT imaging,
- the CCD sensor CD is longer than the MOS sensor MS for panoramic photography. Switching between the 2D X-ray detector MS and CD is possible by displacing the cassette holder described above depending on the imaging mode and positioning the 2D X-ray detector MS or CD at a position where X-ray irradiation can be received.
- a planar MOS sensor MS for CT imaging on both the front and back sides of a single substrate BS and an elongated CCD sensor CD for 2 V llama imaging. May be provided.
- the cassette holder 9 of the X-ray detection unit 7 should have a structure in which the film cassette 21 and the digital sensor cassettes 20 and 22 can be mounted without hindrance.
- Various commands can be employed to command switching of control to various types of photography.
- the operator commands switching for example, the operator commands switching using a switching switch provided on the cassette.
- the operator commands switching by inserting a pin into the jack provided on the cassette.
- the cassette type may be automatically detected by mounting the cassette.
- a concave portion or a convex portion having a different position for each type is provided in a part of the exterior of the cassette, and this is detected mechanically, optically, or electrically.
- the type of sensor cassette mounted on the limit switch provided on the cassette holder is detected. Also installed in the sensor cassette Detects an IC tag. Further, the barcode provided on the sensor cassette is read out.
- the control unit 100 switches control accordingly.
- the set shooting may be displayed on the operation panel 12 or the like.
- the control unit 100 including the CPU is accommodated in the support arm 4a. As shown in FIG. 7, an X-ray control unit 102 that controls the X-ray source of the X-ray generator 8 is connected to the control unit 100. Further, the control unit 100 is selectively connected to the X-ray detector 104 for the radiography or linear tomography in the cassette 21 or 22.
- the cassette holder control motor 110 controls the movement of the cassette mounted on the cassette holder 9.
- signals are input to the control unit 100 from various switches and sensors 112 provided at appropriate positions of the swing arm 5.
- the control unit 100 swings the lifting control motor 114 that moves the lifting unit, the X-axis control motor 116 and the Y-axis control motor 118 of the XY movement mechanism, the swing control motor 120 of the swing arm 26, and the X-ray generator 6 in a horizontal plane.
- the moving swing control motor 122 is driven.
- the control unit 100 receives an instruction from the operator's power via the input means 124 (for example, a button provided on the operation panel). (In addition, as described above, when the cassette is automatically discriminated, the signal for that purpose is input.) Also, when the cassette is changed, the switching mechanism 126 is controlled accordingly, and the primary Switch the slit.
- an image reconstruction means 130 which is an image reconstruction program for performing CT imaging control and image reconstruction calculation, is added.
- the image reconstruction means 130 is included in the control unit 11 (FIG. 2), and receives projection data from the two-dimensional X-ray detector 106 in the CT imaging cassette 20 via the signal processing unit 108. Then, image reconstruction is performed to convert the X-ray projection data obtained by the two-dimensional X-ray detector 106 into the distribution of the X-ray absorption coefficient of the subject to generate tomographic image data of the tomographic plane of the subject. To do.
- the tomographic image data can be displayed on the image display means.
- the control unit 100 executes a control program stored in a storage unit (not shown) such as a ROM based on various switches and signals input by the sensor force.
- a storage unit such as a ROM
- the control program is the control means for performing these controls. Is also added.
- a broken line indicates a block added to the apparatus, and a two-dot chain line indicates a block that is selectively mounted.
- the X-ray imaging apparatus includes a slit module 40, an operation panel module 42 and a control module 44.
- the operation panel module 42 includes a force setting module 46.
- an X-ray generator 6 and an X-ray detector 7 are arranged on the swivel arm 4 so as to face each other with a subject interposed therebetween.
- the cassette type of imaging
- the X-ray field shape irradiated from the X-ray generator 6 and the light-receiving shape on the X-ray detector 7 side are switched according to the imaging mode.
- an X-ray generator 6 including an X-ray tube is built in, and a primary slit is provided on the front surface of the housing facing the X-ray detector 7.
- a slit module 40 including an adjusting mechanism for changing the shape of the X-ray shielding plate and its primary slit is disposed.
- the primary slit plate 15 provided on the front side of the X-ray generator 6 is formed with a vertically long slit for panoramic imaging and a rectangular slit for CT imaging.
- the drive motor sets the primary slit corresponding to the cassette.
- the force set module 46 includes an X-ray light receiving portion 7 (X-ray film, CCD sensor, etc.) and a corresponding secondary slit plate 8.
- the force setting module 46 may be switched according to the type of shooting. Further, the operation panel module 42 includes the force operation module 12 of the force setting module 46 and the like. The operation panel module 42 may be replaceable as a whole.
- the control module 44 is in the support arm 4a and includes a control unit 100. When changing from panoramic imaging to CT imaging, replace or change the slit module 40, operation panel module 42 and control module 44 described above, so that the size of the irradiation field, the imaging conditions to be set, the trajectory of the swivel arm, Image data processing Control is switched.
- FIG. 9 and FIG. 10 show an example of primary slit setting.
- the cassette type of imaging
- the X-ray field shape irradiated from the X-ray generator 6 and the light-receiving shape on the X-ray detector 7 side are switched according to the imaging mode.
- An X-ray source including an X-ray tube is built in the housing 6 ′ including the X-ray generator 6, and a primary slit SL1 is formed on the front surface of the housing facing the X-ray detection unit 7.
- a slit module (SL) 40 including an X-ray shielding plate and an adjusting mechanism for changing the shape of the primary slit is disposed.
- the primary slit plate SL2 provided on the front side of the X-ray generator 6 includes a vertical slit SL3 for V-llama imaging, a rectangular slit SL4 for CT imaging, and a long slit for SLEP imaging SL5.
- the slit module (SL) 40 sets the primary slit SL1 corresponding to the cassette by the drive motor SM.
- the X-ray detector 7 has a secondary slit plate (arm cover), which is a shielding plate 8 for changing the light receiving shape (irradiation field), arranged on the front surface facing the X-ray generator 6. It has been integrated. Therefore, changing the cassette also changes the secondary slit.
- the secondary slit may be installed separately from the cassette. In addition, using a shielding plate with multiple secondary slit shapes, the secondary slit shape may be switched according to the cassette change.
- control module (firmware or the like) 44 including the control unit 100 housed in the support arm 4a is switched according to the type of imaging to change the control content (see FIG. 11). .
- the X-ray detector side housing (operation panel module 42) including the cassette holder and the operation panel 12 can be replaced as a whole.
- a part of the software control of the control unit 100 may be incorporated in the control unit 11 in the housing.
- the software control program includes a control program for controlling the X-ray irradiation timing, the X-ray beam irradiation field, the swiveling arm, and the like.
- the control means 132 shown in FIG. 7 includes the above-described embedded software control program. Therefore, the cassette, secondary slit, control software and operation panel can be replaced by replacing the entire housing.
- the operation panel module 42 which is a unit for X-ray CT imaging, uses CT imaging with a built-in 2D X-ray detector to acquire X-ray projection data for CT imaging of the subject.
- it further includes control means for controlling the X-ray irradiation timing for X-ray CT imaging, the irradiation field of the X-ray beam generated by the X-ray generator, and the turning means. Yes.
- FIG. 11 is a flowchart for control switching in the control unit 100.
- a sensor selection command is received or a sensor selection is detected (S10)
- the process branches according to the contents of the command. If it is a MOS sensor (YES in S12), switch the device to MOS sensor mode (S14). If preparation for imaging is completed (YES in S16), CT imaging is performed (S18). If it is not a MOS sensor (NO in S12), switch the device to CCD sensor mode (S20).
- the X-ray generator 6 and the swivel arm fitted with the X-ray CCD sensor are focused on the subject while irradiating the X-ray from the X-ray generator 6 toward the X-ray CCD sensor cassette 22. Take a picture while turning with the rotation axis fixed.
- V-rama shooting is selected (YES in S22)
- the apparatus is switched to panorama mode (S24).
- panorama shooting is performed (S28).
- the patient's head is fixed at a predetermined position on the patient frame 4b and, for example, a film cassette 21 loaded with an X-ray film is attached to the cassette holder 9.
- X-rays are emitted from the X-ray generator 6 toward the X-ray detection unit 7, and the turning center 5 is moved along a predetermined trajectory while turning the turning arm 5, and is synchronized with this.
- the cassette holder 9 with the film cassette 21 attached is moved horizontally at a specified speed together with the cassette. This movement is performed by a driving motor 9b provided in the cassette holder 9, and the direction thereof is a direction substantially orthogonal to the X-ray beam emitted from the X-ray generator 6 to the X-ray detector 7. .
- linear tomography is selected (YES in S30)
- the apparatus is switched to linear tomography mode (S32).
- preparation for imaging is completed (YES in S34)
- linear tomography is performed (S36).
- the cassette holder 9 with the X-ray generator 6 and the film cassette 21 mounted thereon is irradiated with X-rays from the X-ray generator 6 toward the film cassette 21.
- the image is taken by turning around the imaging region (tomographic plane).
- cassette held in the cassette holder 9 has been replaced, but various modifications of cassettes or cassette holders can also be used.
- force Set the set holder so that two types of cassettes can be accommodated in parallel, and the cassette on the X-ray generator side can be taken out so that the other cassette accommodated on the back side can be used.
- different X-ray sensors are installed on the two sides of one cassette, and they are made to face another sensor X-ray generator 6 by changing the direction of insertion into the cassette holder.
- the relative movement of the X-ray generator 6 and the X-ray detector 7 (eg, X-ray sensor, X-ray detector) relative to the subject is relative to the subject. It is exercise. The subject is fixed and the X-ray generator 6 and the X-ray detector 7 may be powered. The X-ray generator 6 and the X-ray detector 7 are fixed and the subject is powered. May be. In the present invention, the movements of the X-ray generator 6 and the X-ray detector 7 with respect to the subject are all defined by the above relative movement.
- the subject when it is necessary to rotate (rotate) the X-ray generator 6 and the X-ray detector 7 relative to the subject, the subject is fixed and the X-ray generator 6 and the X-ray are fixed.
- the detection unit 7 may be turned, but the X-ray generator 6 and the X-ray detection unit 7 may be fixed and the subject may be rotated or moved.
- the rotation or movement of the subject and the turning of the X-ray generator 6 and the X-ray detector 7 may be combined. The same applies to operations other than turning (rotation).
- the X-ray CT imaging unit of the present invention has other medical uses (for example, otolaryngology). It can also be applied to medical photography and cervical spine of the neck.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112006000870T DE112006000870T5 (de) | 2005-04-11 | 2006-04-11 | Einheit zur Röntgen-Computertomographie-Abbildung und Röntgenabbildungsgerät |
US11/918,197 US7773720B2 (en) | 2005-04-11 | 2006-04-11 | Unit for X-ray CT imaging and X-ray imaging apparatus |
FI20070844A FI20070844L (fi) | 2005-04-11 | 2007-11-08 | Röntgentietokonetomografiakuvausyksikkö ja röntgenkuvauslaite |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-113835 | 2005-04-11 | ||
JP2005113835 | 2005-04-11 | ||
JP2005-115151 | 2005-04-12 | ||
JP2005115151A JP4488948B2 (ja) | 2005-04-11 | 2005-04-12 | X線ct撮影用ユニットおよびx線撮影装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006109802A1 true WO2006109802A1 (ja) | 2006-10-19 |
Family
ID=37087073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/307663 WO2006109802A1 (ja) | 2005-04-11 | 2006-04-11 | X線ct撮影用ユニットおよびx線撮影装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7773720B2 (ja) |
JP (1) | JP4488948B2 (ja) |
DE (1) | DE112006000870T5 (ja) |
FI (1) | FI20070844L (ja) |
WO (1) | WO2006109802A1 (ja) |
Cited By (3)
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EP1752100A3 (en) * | 2005-08-08 | 2007-09-26 | Vatech Co., Ltd. | Combined panoramic and CT (computed tomography) X-ray apparatus |
EP2156791A1 (en) | 2008-08-22 | 2010-02-24 | Trophy | Dental radiology apparatus and associated method of use |
EP2156792A1 (en) * | 2008-08-22 | 2010-02-24 | Trophy | Panoramic dental radiology apparatus and associated method of use |
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JP4739278B2 (ja) | 2007-05-11 | 2011-08-03 | 株式会社モリタ製作所 | X線ct撮影装置 |
KR100947298B1 (ko) * | 2007-08-09 | 2010-03-16 | 주식회사바텍 | Ct 촬영용 면 센서를 이용한 ct 및 파노라마 겸용 x선촬영장치 |
US7844031B2 (en) * | 2007-11-20 | 2010-11-30 | Carestream Health, Inc. | Firing delay for retrofit digital X-ray detector |
JP5368817B2 (ja) * | 2008-04-24 | 2013-12-18 | 浜松ホトニクス株式会社 | 医療用x線撮像システム |
FI123978B (fi) * | 2008-06-27 | 2014-01-15 | Planmeca Oy | Hammashoitolaitteisto |
KR100990474B1 (ko) | 2008-11-18 | 2010-10-29 | (주)바텍이우홀딩스 | 듀얼 소스 엑스선 ct 촬영 장치 |
JP4516626B1 (ja) * | 2009-09-28 | 2010-08-04 | 株式会社吉田製作所 | 歯科用x線撮影装置 |
US8690425B2 (en) * | 2009-11-25 | 2014-04-08 | Carestream Health, Inc. | Retrofit of a mobile cart |
ITBO20110566A1 (it) * | 2011-10-05 | 2013-04-06 | Cefla Coop | Dispositivo per l'acquisizione di radiografie panoramiche e radiografie volumetriche cbct |
KR101396663B1 (ko) * | 2011-12-22 | 2014-05-19 | (주)제노레이 | 엑스선 촬영장치 및 이를 이용한 촬영방법 |
CN102755173A (zh) * | 2012-07-06 | 2012-10-31 | 北京工业大学 | 一种数字化全景齿科x线成像仪 |
JP6370297B2 (ja) * | 2012-09-07 | 2018-08-08 | トロフィー | 部分的ct撮影のための装置 |
CN107003238B (zh) * | 2014-07-07 | 2021-01-12 | 生物辐射实验室股份有限公司 | 接触成像仪 |
JP6283871B2 (ja) * | 2016-10-19 | 2018-02-28 | 朝日レントゲン工業株式会社 | X線撮影装置 |
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2006
- 2006-04-11 DE DE112006000870T patent/DE112006000870T5/de not_active Withdrawn
- 2006-04-11 WO PCT/JP2006/307663 patent/WO2006109802A1/ja active Application Filing
- 2006-04-11 US US11/918,197 patent/US7773720B2/en not_active Expired - Fee Related
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2007
- 2007-11-08 FI FI20070844A patent/FI20070844L/fi not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
JP2006314339A (ja) | 2006-11-24 |
US20090052616A1 (en) | 2009-02-26 |
US7773720B2 (en) | 2010-08-10 |
JP4488948B2 (ja) | 2010-06-23 |
DE112006000870T5 (de) | 2008-03-06 |
FI20070844L (fi) | 2007-11-08 |
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