• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. Method for axial transverse tomography in which a radiation source (1) emits one or more fan-shaped beams (2) obtained with the aid of a primary collimator (4, 5) against a body (3) to be investigated and the transmitted rays are then captured through a first row of secondary collimators (7) of large aperture by a plurality of detectors (8) which form a second row, characterized in that, for obtaining in certain cases an image of a section of the body (3) with increased spatial resolution between the radiation source (1) and the body (3) a removable primary grating (9) is inserted which is provided with slots (10) which each allow to pass a fine beam having a width which is smaller than the width defined by the apertures of the primary collimator and/or the secondary collimators (7) and that, for obtaining in other cases an image with increased density resolution, the removable grating (9) is taken out of the trajectory of the fan-shaped beam or beams (2).
    公开号:SU786852A3
    申请号:SU782669903
    申请日:1978-10-05
    公开日:1980-12-07
    发明作者:Дъаенан Жан-Пьер
    申请人:Компани Женераль Де Радиоложи (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to medical equipment, namely to radiography.
    A device for axial transverse tomography 5 containing a source of x-ray radiation, comprising an x-ray tube connected to a primary collimator mounted in the path of the emitted beam (curved by a tube of rays and creating fan-shaped rays, a support, detectors located next to each other and connected with the secondary However, this device does not allow to work alternately with increased spatial resolution or with increased resolution in dense jq type, which Moreover, the device does not have the ability to adjust the position of the lattice slots relative to the apertures of the secondary collimator.
    The purpose of the invention is the provision of the possibility of alternating work with increased spatial resolution or with increased resolution jq in density, as well as providing the possibility of adjusting the position of the grating slots relative to the apertures of the secondary collimator.
    This goal is achieved in that the device comprises a removable grating made with the possibility of introducing into the beam of rays between the radiation source and the body and having a number of narrow parallel slots, means for moving the specified grating relative to the beam of rays and means for mechanically controlling the movement of the specified grating · with electric drive .
    In addition, in the device, the means for moving the grating is made in the form of two semi-axes attached to the grating, the opposite ends of which are mounted for rotation in bearings mounted on the support of the device, relative to an axis passing on one side of the beam of rays and oriented perpendicularly one of the beams, while one of these axles is connected to an electric drive.
    In addition, in the device, the electric drive can be made in the form of an electromagnet, the core of which is attached to one end of the chain associated with an asterisk mounted on one of the axle shafts, while the other end of the chain is connected to the support of the device using a pulling spring.
    In addition, in the device, one of the bearings has a threaded hole oriented in the axis, in which a screw is mounted connected to the other bearing, one end of the screw being used to connect a second electric drive to the shaft. .
    In FIG. 1 schematically shows an apparatus for axial transverse tomography; on. 2 is a kinematic diagram of a means for moving the lattice; in FIG. 3 - in general terms, means for moving the grating.
    The device contains an x-ray source 1, including an x-ray tube connected to the primary collimator in the form of two diaphragms 2 and 3 mounted in the path of the beam of 4 rays emitted by the tube and creating fan-shaped rays, support 5, detectors 6, located next to each other and connected with a secondary collimator 7 having wide-angle apertures.
    In addition, the device contains a removable grating 8, made with the possibility of introducing into the beam 4 rays between the radiation source 1 and the body 9 and having a number of narrow parallel slots 10 and means for moving the specified lattice relative to the beam of rays.
    The means for moving the lattice is made in the form of two axles 11 and 12 and attached to the lattice 8, the opposite ends of which are mounted for rotation in bearings 13 th 14, mounted on the support 5 of the device through flanges 15 and 16 relative to the axis / passing on one side of the beam 4 'beams and' oriented perpendicular to one of the beams, with the semi-axis 11 connected to the first electric 'drive. The first drive is made in the form of an electromagnet 17, the core 18 of which is attached to one end of the chain 19, connected with an asterisk 20, mounted on the axle shaft 11, while the other end of this circuit is connected to the support of the device using a pulling spring 21.
    The bearing 14 has an axis-oriented threaded hole 22 in which a screw 23 is mounted connected to another bearing 24, one end of the screw 23 being connected to the shaft 25 of the second electric drive 26 through a coupling. To limit the movement of the grill 8, we use a strip'27, with which an adjusting screw 28, fixed in the frame 29, interacts.
    In addition, the device is equipped with a means for mechanically controlling the movement of the lattice (in black (not indicated).
    The device operates as follows.
    When working with an increased density resolution to perform IQ axial transverse tomography in the path of the radiation beam 4, there is no grating 8. In this case, individual beams of radiation coming from the body 9 and incident on each of the detectors 6 are determined mainly by secondary * 5 collimators 7 and for this reason are relatively wide.
    When working with increased spatial resolution, it is necessary to reduce the width of the radiation beams.
    This is achieved by installing on the radiation path of the grating 8. The rotation of the grating is carried out using means for its movement. In this case, the electromagnet 17 is activated, and the movement of the core 18 through the chain 19, the sprocket 20 and the half shaft 11 is communicated to the frame 29 with the grating 8. As a result, the grating occupies a position along the path of the beam 4. The correct installation of the slots 10 of the grating 9 with respect to the centers secondary collimators 7. is carried out by the drive 26. When the shaft 25 of this drive is rotated, the screw 23 is set in motion. As a result of the rotation of the screw 23, the axle shaft 12 and, consequently, the frame 29 with the lattice 8 in the directions of arrow A indicated by in FIG. 3.
    Thus, the design of the device provides the possibility of alternating work with increased spatial resolution or with increased resolution in density, which expands the area of use of the device.
    权利要求:
    Claims (4)
    [1]
    This invention relates to a medical technique, namely, radiography. A device for axial transverse tomography, comprising an x-ray source, comprising an x-ray tube associated with a primary collimator mounted in the path of the rays emitted by the tube and creating fan-shaped rays, a support, detectors adjacent to each other and associated with the secondary collimator, having wide-angle apertures p. . However, this device does not allow working alternately with an increased spatial resolution or with an increased resolution of tightness, which limits the area of use of the device. In addition, the device does not have the ability to adjust the position of the lattice slits relative to the apertures of the secondary collimator. The purpose of the invention is to provide the possibility of alternate operation with increased spatial resolution or with increased resolution in density, as well as providing the possibility of adjusting the position of the lattice slits relative to the apertures of the secondary collimator. The goal is achieved by the fact that the device contains a removable grid made with the possibility of introducing radiation into the beam between the source of radiation and the body and having a number of narrow pair of flat slits, means for moving the said grid relative to the beam of rays and D. 1 Mechanical motion control specified lattice. electrically operated. In addition, in the device, the means for moving the lattice are made in the form of two semi-axes attached to the grid, the opposite ends of which are mounted so that they can be rotated in bearings mounted on the device support, relative to the axis passing from one side of the beam of beams and oriented perpendicular to one of the beams, while one of the indicated semi-axes is connected to an electric drive. In addition, in the device, the electric drive can be made in the form of an electromagnet, the core of which is attached to one end of the chain associated with an asterisk mounted on one of the semi-axes, while the other end of the chain is connected to the support of the device by means of a drag spring. In addition, in the device one of the bearings has a threaded hole oriented along the axis, in which there is a screw connected to the other bearing, with one end of the screw being used to connect to the shaft of the second electric drive. . FIG. 1 schematically shows an apparatus for axial transverse tomography; on. 2 is a kinematic diagram of a grid displacement means; in fig. 3 is a general view of the means for moving the lattice. The device contains an X-ray source 1 including an X-ray tube associated with the primary collimator in the form of two diaphragms 2 and 3 mounted in the path of the beam 4 rays emitted by the tube and creating fan-shaped rays, support 5, detectors 6 disposed adjacent to each other and associated with secondary collimator 7 having wide-angle apertures. In addition, the device comprises a removable grid 8, made with the possibility of introducing into the beam 4 rays between the radiation source 1 and the body 9 and having a number of narrow parallel slits 10 and means for moving the said grid relative to the beam of rays. The means for moving the lattice are made in the form of two semi-axes 11 and 12 and attached to the grid 8, the opposite ends of which are mounted for rotation in bearings 13 and 14 mounted on the support 5 of the device through flanges 15 and 16 relative to the axis / passing from one side beam 4 rays and oriented perpendicular to one of the rays, with the semi-axis; 11 connected to the first electric drive. The first drive is made in the form of an electromagnet 17, the core 1 of which is attached to one end of the chain 19 associated with an asterisk 20 attached to the half-axle 11, while the other end of the specified chain is connected to the device support using a pull spring 21. The bearing 14 has an oriented axially, a threaded bore 22, which is provided with a screw 23 connected to another bearing 24, with one end of a screw 23 connecting 1 to a shaft 25 of a second electric actuator 2 via a sleeve. To limit the variable. The grate 8 serves as a strap 27, with which the adjustment screw 28, which is fixed in the frame 29, interacts. In addition, the device is equipped with a means for mechanically controlling the movement of the grating (not shown on the drawing). The device works as follows. When working with an increased density resolution for performing axial transverse tomography in the path of the radiation beam 4, there is no grating 8. In this case, the individual beams of radiation coming from the body 9 and falling on each of the detectors 6 are determined mainly by the secondary collimators 7 and for this reason are relatively broad. When working with an increased spatial resolution, it is necessary to reduce the width of the radiation beams. This is achieved by installing the grating 8 in the path of radiation. The grating is rotated by means of its movement. In this case, the electromagnet 17 is activated, and the movement of the core 18 through the chain 19, the sprocket 20 and the semi-axle 11 is connected to the frame 29 with the grid 8. As a result, the grid occupies a position on the beam path 4. The slots 10 of the grid 9 are correctly positioned relative to the centers of the secondary collimators 7 The drive 26 is driven. When the shaft 25 of this drive is rotated, a screw 23 is set in motion. As a result of the rotation of the screw 23, the axis 12 and, hence, the frame 29 with the lattice B in the direction of arrow A shown in FIG. 3. Thus, the design of the device provides the possibility of alternate operation with increased spatial resolution or with increased density resolution, which expands the area of use of the device. Claims 1. An axial transverse tomography apparatus comprising an x-ray source comprising an x-ray tube associated with a primary collimator, mounted in a path of rays emitted by a tube and generating fan-shaped rays, a support, detectors arranged side by side and connected with secondary collimator having wide-angle apertures, characterized in that, in order to provide the possibility of alternate operation with an increased spatial resolution or with an increased resolution By its density, the device comprises a removable grill, which can be inserted into the beam between the radiation source and the body and a series of narrow parallel slits, means for moving the said grid relative to the beam, and means for mechanically controlling the movement of said electric-driven grid . .
    [2]
    2. The device according to claim 1, characterized in that the means for moving the lattice is made in the form of two semi-axes attached
    to the lattice, the opposite ones which are mounted for rotation in bearings, mounted on the support of the device, about an axis passing on one side of the beam of rays and oriented perpendicularly to one of the rays, with one of these axes connected to the electric drive.
    [3]
    3. The device according to claim 1, characterized in that the electric drive is made in the form of an electromagnet, the core of which is attached to one end of the chain associated with an asterisk mounted on one of the semi-axes, while the other end of the chain is connected to the support of the device Bottom spring.
    [4]
    4. The device according to claims 2 to 3, in which, in order to enable the position of the slits of the lattice to be adjusted relative to the secondary collimator apertures, one of the bearings has an axially oriented threaded hole in which a screw associated with another bearing, with one
    The s end of the screw serves to connect to the second electric drive shaft.
    Sources of information taken into account in the examination
    0
    1. US patent 3944833, cl. 128-2A, 16.03.76 (prototype).
    21
    18
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    同族专利:
    公开号 | 公开日
    JPS5566346A|1980-05-19|
    DE2860144D1|1980-12-11|
    FR2405696B1|1981-08-28|
    FR2405696A1|1979-05-11|
    EP0001523A1|1979-04-18|
    EP0001523B1|1980-09-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1079448B|1959-02-10|1960-04-07|Alfred Maier Dipl Ing|Arrangement for aligning a compensation filter|
    DE1800879C3|1968-10-03|1974-01-10|Siemens Ag, 1000 Berlin U. 8000 Muenchen|Primary radiation diaphragm for X-ray examination equipment|
    DE2548531C2|1975-06-30|1990-01-18|Gary T. Birmingham Ala. Us Barnes|
    US4053780A|1975-10-20|1977-10-11|Syntex Inc.|Method for calibration of an axial tomographic scanner|DE2944147A1|1979-11-02|1981-05-14|Philips Patentverwaltung Gmbh, 2000 Hamburg|ARRANGEMENT FOR DETERMINING THE SPREAD DENSITY DISTRIBUTION IN A LEVEL EXAMINATION AREA|
    DE3104052A1|1981-02-06|1982-08-19|Philips Patentverwaltung Gmbh, 2000 Hamburg|"X-RAY EXAMINATION ARRANGEMENT WITH HIGH LOCAL RESOLUTION"|
    DE3469666D1|1983-04-25|1988-04-07|Toshiba Kk|X-ray diagnostic apparatus|
    JPS61249452A|1985-04-30|1986-11-06|Toshiba Corp|X-ray diagnostic apparatus|
    US4905268A|1985-10-25|1990-02-27|Picker International, Inc.|Adjustable off-focal aperture for x-ray tubes|
    US4672648A|1985-10-25|1987-06-09|Picker International, Inc.|Apparatus and method for radiation attenuation|
    JPS62191972A|1986-02-18|1987-08-22|Toshiba Corp|X-ray image processor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7730533A|FR2405696B1|1977-10-11|1977-10-11|
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