WO2014126053A1 - Ｘ線診断装置およびｘ線可動絞り装置 - Google Patents

Ｘ線診断装置およびｘ線可動絞り装置 Download PDF

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Publication number
WO2014126053A1
WO2014126053A1 PCT/JP2014/053070 JP2014053070W WO2014126053A1 WO 2014126053 A1 WO2014126053 A1 WO 2014126053A1 JP 2014053070 W JP2014053070 W JP 2014053070W WO 2014126053 A1 WO2014126053 A1 WO 2014126053A1
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WIPO (PCT)
Prior art keywords
ray
diaphragm
blade
imaging
irradiation range
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PCT/JP2014/053070
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English (en)
French (fr)
Japanese (ja)
Inventor
誠一 西塚
靖宏 菅原
Original Assignee
株式会社 東芝
東芝メディカルシステムズ株式会社
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Application filed by 株式会社 東芝, 東芝メディカルシステムズ株式会社 filed Critical 株式会社 東芝
Priority to KR1020157019813A priority Critical patent/KR101701660B1/ko
Priority to CN201480005916.4A priority patent/CN104936527B/zh
Publication of WO2014126053A1 publication Critical patent/WO2014126053A1/ja

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    • 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
    • A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4208—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
    • A61B6/4233—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using matrix detectors
    • 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
    • A61B6/06—Diaphragms
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/04—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers

Definitions

  • Embodiments of the present invention relate to an X-ray diagnostic apparatus and an X-ray movable diaphragm apparatus for long imaging.
  • an X-ray diagnostic apparatus having an X-ray flat panel detector may perform long imaging for imaging the lower limbs of the subject and the entire spinal column.
  • FPD X-ray flat panel detector
  • FIG. 20 there are three types of shooting methods for long shooting.
  • the X-ray tube fixing method shown in FIG. 20 the X-ray tube is fixed over the execution period of long imaging.
  • the FPD is moved over the range of the target region for long imaging.
  • the aperture of the X-ray movable aperture is controlled so that the moved FPD region matches the X-ray irradiation range.
  • a plurality of medical images acquired in long imaging in the X-ray tube fixing method are combined with a predetermined overlapping width.
  • the accuracy of superimposition (hereinafter referred to as bonding accuracy) in a predetermined overlapping width in the combined medical image (hereinafter referred to as a long image) is higher than that in the X-ray tube moving method described later. It becomes accuracy.
  • the X-ray movable diaphragm moves a plurality of diaphragm blades that limit the X-ray irradiation range along the major axis direction (hereinafter referred to as the major axis diaphragm blades) independently in the major axis direction. It is necessary to have a mechanism that can be operated (hereinafter referred to as an independent movement mechanism). That is, there is a problem that the X-ray tube fixing method cannot be executed with the conventional X-ray movable diaphragm in which the long-axis direction diaphragm blades are moved in conjunction with each other.
  • an axis along the minor axis direction (hereinafter referred to as the major axis central axis) passing through the midpoint of the length along the major axis direction in the maximum irradiation field (maximum X-ray irradiation range).
  • the long-axis-direction diaphragm blades cannot be moved. For this reason, as shown in FIG. 21 and FIG. 22, the shooting range of the long shooting is equal to two FPDs. There is a problem that long photographing cannot be performed in an area exceeding the length of two FPDs.
  • the length of the long axis direction diaphragm blade in the long axis direction becomes long, so the size of the X-ray movable diaphragm becomes large.
  • the long-axis direction diaphragm blade cannot be moved beyond the long-axis central axis without increasing the outer shape of the X-ray movable diaphragm, and the imaging range is limited to two FPDs.
  • the FPD is moved along with the movement of the X-ray tube along the long axis direction.
  • long imaging can be performed with an arbitrary number (for example, three FPDs).
  • the bonding accuracy is low in a plurality of medical images taken by long imaging.
  • the reduction in the bonding accuracy is caused by the difference in the X-ray direction that passes through the object at each bonding surface at the distance between the subject and the FPD (Patiant Image Distance: hereinafter referred to as PID).
  • the X-ray tube rotation method long imaging is performed by moving the FPD with the rotation of the X-ray irradiation range according to the rotation of the X-ray tube.
  • the X-ray tube rotation method is higher than the bonding accuracy in the X-ray tube moving method and has the same bonding accuracy as the X-ray tube fixing method.
  • an X-ray tube rotating mechanism that rotates the heavy X-ray tube around the focal point of the X-ray tube according to the imaging range of the long imaging and the movement of the FPD is required.
  • further mounting of the X-ray tube rotating mechanism has a problem that the manufacturing cost increases.
  • CR computed radiography
  • the subject is imaged and stored in an X-ray detector such as an imaging plate having a stimulable phosphor.
  • the read X-ray image information needs to be read by a reader. That is, there is a problem that the real-time property is inferior in the long imaging by the CR apparatus as compared with the X-ray diagnostic apparatus having FPD.
  • the X-ray movable diaphragm has a plurality of front blades and a plurality of back blades.
  • the two front blades arranged in parallel in the X-axis direction are moved along the X-axis direction in conjunction with each other.
  • the two front blades arranged in parallel in the X-axis direction are moved symmetrically with respect to an axis passing through the center of the irradiation range and parallel to the Y-axis.
  • the two front blades arranged in parallel in the Y-axis direction are moved along the Y-axis direction in conjunction with each other.
  • the two front blades arranged in parallel in the Y-axis direction are moved symmetrically with respect to an axis passing through the center of the irradiation range and parallel to the X-axis.
  • the diaphragm operation is executed by the movement of the four front blades.
  • the two rear blades arranged in parallel in the X-axis direction are moved along the X-axis direction in conjunction with the movement of the two front blades arranged in parallel in the X-axis direction.
  • the two rear blades arranged in parallel in the Y-axis direction are moved along the Y-axis direction in conjunction with the movement of the two front blades arranged in parallel in the Y-axis direction.
  • the back vanes shield X-rays derived from secondary electrons generated at the focal point (hereinafter referred to as out-of-focus X-rays). Due to these mechanisms, there is a problem that the plurality of front blades cannot narrow the irradiation range beyond the center of the irradiation range.
  • An object is to provide an X-ray diagnostic apparatus and an X-ray movable diaphragm apparatus that have a X-ray movable diaphragm that can be miniaturized and that are capable of long imaging with good bonding accuracy.
  • An X-ray diagnostic apparatus includes an X-ray tube that generates X-rays at an X-ray focal point, an X-ray flat panel detector that detects X-rays generated from the X-ray tube and transmitted through a subject, A plurality of first shielding plates that limit the generated X-ray irradiation range from both ends of the irradiation range along a predetermined direction, and a length along the predetermined direction at the maximum aperture of the irradiation range.
  • An X-ray movable diaphragm having at least one second shielding plate movable at least partially beyond the midpoint along the predetermined direction.
  • FIG. 1 is a diagram illustrating an example of the configuration of the X-ray diagnostic apparatus according to the first embodiment.
  • FIG. 2 is a diagram illustrating an example of the configuration of the X-ray movable diaphragm according to the first embodiment.
  • FIG. 3 is a perspective view illustrating an example of a plurality of first and second diaphragm blades and a shielding unit in the X-ray movable diaphragm unit according to the first embodiment.
  • FIG. 4 is a flowchart illustrating an example of the procedure of the long photographing process according to the first embodiment.
  • FIG. 5 is a diagram illustrating an example of the configuration of an X-ray diagnostic apparatus according to a modification of the first embodiment.
  • FIG. 1 is a diagram illustrating an example of the configuration of the X-ray diagnostic apparatus according to the first embodiment.
  • FIG. 2 is a diagram illustrating an example of the configuration of the X-ray movable diaphragm according to the first embodiment.
  • FIG. 6 is a diagram illustrating an example of the configuration of the X-ray movable diaphragm unit according to the second embodiment.
  • FIG. 7 is a plan view showing an example of the structure of a plurality of first and second diaphragm blades and third diaphragm blades in the X-ray movable diaphragm section according to the second embodiment.
  • FIG. 8 is a cross-sectional view illustrating an example of a cross section taken along the first central axis and the Z axis in FIG. 7 according to the second embodiment.
  • FIG. 9 is a flowchart illustrating an example of the procedure of the long photographing process according to the second embodiment.
  • FIG. 10 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the first imaging in connection with the long imaging process of the second embodiment.
  • FIG. 11 relates to the long imaging processing of the second embodiment.
  • the first to third aperture blades in the X-ray tube and the X-ray movable aperture section, the X-ray flat panel detector It is a top view which shows an example of relative positional relationship of these.
  • FIG. 12 is a diagram illustrating an example of the relative positional relationship between the first to third aperture blades in the second imaging in connection with the long imaging process of the second embodiment.
  • FIG. 13 relates to the long imaging process of the second embodiment. In the second imaging in FIG.
  • FIG. 14 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the third imaging in connection with the long imaging process of the second embodiment.
  • FIG. 15 relates to the long imaging process of the second embodiment.
  • the third imaging in FIG. 14 the first to third aperture blades in the X-ray tube and the X-ray movable aperture section, the X-ray flat panel detector, It is a top view which shows an example of relative positional relationship of these.
  • FIG. 14 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the third imaging in connection with the long imaging process of the second embodiment.
  • FIG. 15 relates to the long imaging process of the second embodiment.
  • the third imaging in FIG. 14 the first to third aperture blades in the X-ray tube and the X-ray movable aperture section, the X-ray flat panel detector, It is a top view which shows an example of relative positional relationship of these.
  • FIG. 14 is a diagram illustrating an
  • FIG. 16 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the first shooting in the case where the number of shootings is two in the long shooting process of the second embodiment.
  • FIG. 17 relates to the long imaging process of the second embodiment.
  • the first imaging in FIG. 17 the first to third aperture blades in the X-ray tube and the X-ray movable aperture section, the X-ray flat panel detector, It is a top view which shows an example of relative positional relationship of these.
  • FIG. 18 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the second imaging in the case where the number of imaging is 2 in the long imaging process of the second embodiment.
  • FIG. 19 relates to the long imaging processing of the second embodiment.
  • FIG. 20 is a diagram showing an example of a plurality of long shooting methods in connection with conventional long shooting.
  • FIG. 21 is a diagram relating to an X-ray movable diaphragm in conventional long imaging.
  • FIG. 22 is a diagram relating to an X-ray movable diaphragm in conventional long imaging.
  • FIG. 23 is a perspective view of a conventional X-ray movable diaphragm.
  • FIG. 1 shows a configuration of an X-ray diagnostic apparatus 1 according to the first embodiment.
  • the X-ray diagnostic apparatus 1 includes a high-voltage generating unit 11, an X-ray tube 131, an X-ray movable diaphragm unit 133, a diaphragm blade arrangement unit 135, and an opening information display unit 137, a support mechanism 13, a top plate 151, A bed 15 having an X-ray flat panel detector (hereinafter referred to as FPD) 153 and a detector moving unit 155, a position determining unit 17, an opening degree information generating unit 18, an image processing unit 19, a storage unit 21,
  • FPD X-ray flat panel detector
  • the high voltage generator 11 generates a tube current supplied to an X-ray tube 131 (to be described later) and a tube voltage applied to the X-ray tube 131.
  • the high voltage generator 11 supplies tube currents suitable for X-ray imaging and X-ray fluoroscopy to the X-ray tube 131 and applies tube voltages suitable for X-ray imaging and X-ray fluoroscopy to the X-ray tube 131, respectively.
  • the high voltage generation unit 11 generates a tube voltage and a tube current according to the X-ray imaging conditions under the control of the control unit 27 described later.
  • the tube voltage corresponding to the long photographing condition is applied to the X-ray tube 131.
  • the tube current is applied to the X-ray tube 131 according to the X-ray imaging conditions.
  • the support mechanism 13 supports an X-ray tube 131, an X-ray movable aperture portion 133, an aperture blade arrangement portion 135, an opening degree information display portion 137, and the like, which will be described later, so as to be movable on three orthogonal axes described later. Specifically, the support mechanism 13 changes the distance between the focal point of X-ray generation in the X-ray tube 131 and the FPD 153 described later (source image distance (hereinafter referred to as SID)).
  • SID source image distance
  • the X-ray tube 131, the X-ray movable diaphragm unit 133, the diaphragm blade arrangement unit 135, the opening degree information display unit 137, and the like are supported.
  • the support mechanism 13 arranges the X-ray tube 131 at the tube position determined by the position determination unit 17 described later.
  • the support mechanism 13 fixes the X-ray tube 131 arranged at the tube position in the long imaging described later.
  • the X-ray tube 131 is based on the tube current supplied from the high voltage generation unit 11 and the tube voltage applied by the high voltage generation unit 11 and is a focal point for X-ray generation (hereinafter referred to as a tube focus). X-rays are generated. In the vicinity of the tube focus, X-rays derived from secondary electrons generated at the tube focus (hereinafter referred to as out-of-focus X-rays) are generated.
  • out-of-focus X-rays X-rays derived from secondary electrons generated at the tube focus
  • the tube focus and a point resulting from the generation of out-of-focus X-rays (hereinafter referred to as an out-of-focus X-ray generation point) are collectively referred to as an X-ray focus.
  • the generated X-rays are emitted from an X-ray emission window in the X-ray tube 131.
  • an axis that passes through the tube focus and is perpendicular to the FPD 153 described later is defined as a Z axis.
  • a long axis direction (hereinafter referred to as a first direction) of the top plate 151 which will be described later, which is perpendicular to the Z axis, is defined as an X axis.
  • An axis perpendicular to the Z axis and the X axis (short axis direction of the top plate 151: hereinafter referred to as a second direction) is defined as a Y axis.
  • the X-ray movable diaphragm 133 is provided between the X-ray tube 131 and the FPD 153 provided on the top plate 151 described later. Specifically, the X-ray movable diaphragm 133 is provided in front of the X-ray emission window in the X-ray tube 131.
  • the X-ray movable diaphragm 133 is also referred to as an irradiation field limiter.
  • the X-ray movable diaphragm unit 133 prevents the X-rays generated by the X-ray tube 131 from being exposed unnecessarily outside the imaging region desired by the operator (hereinafter referred to as the maximum irradiation range). ) To a predetermined irradiation range.
  • the X-ray movable diaphragm 133 blocks a plurality of first diaphragm blades movable in the first direction (predetermined direction), a plurality of second diaphragm blades movable in the second direction, and off-focus X-rays. And a shielding part.
  • the out-of-focus X-ray is, for example, an X-ray outside the region sandwiched between the first and second diaphragm blades.
  • Each of the first and second diaphragm blades is made of lead that shields X-rays generated by the X-ray tube 131.
  • FIG. 2 is a configuration diagram illustrating an example of the configuration of the X-ray movable diaphragm 133.
  • the plurality of first diaphragm blades 1331 are movable in the first direction beyond the midpoint of the length along the first direction in the maximum irradiation range.
  • the plurality of second diaphragm blades 1333 are movable in the second direction beyond the midpoint of the length along the second direction in the maximum irradiation range. May be.
  • the shielding unit 1335 includes a first shielding blade 1337 that can move in the first direction in conjunction with the movement of the first diaphragm blade 1331, and a second that can move in the second direction in conjunction with the movement of the second diaphragm blade 1333. And a shielding blade 1339.
  • the shielding part 1335 is provided at a position on the X-ray focal point side with respect to the first and second diaphragm blades. Specifically, the shielding part 1335 is provided between the X-ray focal point and the first diaphragm blade.
  • the shielding unit 1335 includes a plurality of first shielding blades 1337 (first shielding blades a, first shielding blades b), a plurality of second shielding blades 1339 (second shielding blades a, second shielding blades b), and a plurality of shielding members 1335.
  • the first moving mechanism 1341 first moving mechanism a, first moving mechanism b
  • a plurality of second moving mechanisms 1343 second moving mechanism a, second moving mechanism b.
  • Each of the first and second shielding blades is made of lead that shields out-of-focus X-rays.
  • the plurality of first shielding blades 1337 and the plurality of second shielding blades 1339 have sizes and structures that shield out-of-focus X-rays in a range other than the predetermined irradiation range in the maximum irradiation range.
  • the first moving mechanism a moves the first shielding blade a in conjunction with the movement of the first aperture blade a.
  • the first moving mechanism b moves the first shielding blade b in conjunction with the movement of the first diaphragm blade b.
  • the second moving mechanism a moves the second shielding blade a in conjunction with the movement of the second aperture blade a.
  • the second moving mechanism b moves the second shielding blade b in conjunction with the movement of the second aperture blade b.
  • first moving mechanism 1341 and the second moving mechanism 1343 have, for example, a rotating portion that rotates around the X-ray focal point.
  • the first moving mechanism 1341 and the second moving mechanism 1343 may move the corresponding shielding blades by, for example, motor driving.
  • the first shielding blade 1337 is moved in the first direction in conjunction with the movement of the first diaphragm blade 1331 via a shaft, for example.
  • the second shielding blade 1339 is moved in the second direction in conjunction with the movement of the second diaphragm blade 1333 via a shaft.
  • the first shielding blade 1337 is a plurality of first shielding plates.
  • the plurality of first shielding plates limit the maximum irradiation range from both ends of the irradiation range along a predetermined direction.
  • the first aperture blade 1331 is a second shielding plate.
  • the second shielding plate is movable along the predetermined direction at least partially beyond the midpoint of the length along the predetermined direction in the maximum aperture of the irradiation range (the aperture of the maximum irradiation range).
  • first shielding blade 1337 may be movable along the first direction beyond the first central axis in the plane including the first shielding blade 1337.
  • the second shielding blade 1339 may be movable along the second direction beyond the second central axis in the plane including the second shielding blade 1339.
  • the shielding unit 1335 may further include a third shielding blade (not shown) that shields out-of-focus X-rays between the first shielding blade 1337 and the first diaphragm blade 1331.
  • the X-ray movable aperture section 133 has a plurality of filters (hereinafter referred to as additional filters) inserted into the use X-ray cone for the purpose of reducing the exposure dose to the subject P and improving the image quality.
  • the additional filter is also called an X-ray filter, a filter plate, a beam filter, a quality filter, or a beam spectrogram filter.
  • the diaphragm blade arrangement unit 135 has a plurality of first diaphragm blades 1331 and a plurality of second blades at first and second blade positions determined by the position determination unit 17 to be described later according to each of a plurality of shootings in the long shooting. Aperture blades 1333 are arranged respectively. Specifically, the diaphragm blade arrangement unit 135 has a first diaphragm blade movement mechanism (not shown) for arranging a plurality of first diaphragm blades 1331 at the first blade position determined by the position determination unit 17.
  • the first diaphragm blade moving mechanism supports each of the plurality of first diaphragm blades 1331 so as to be slidable beyond an axis (hereinafter referred to as a first central axis) passing through the midpoint and along the second direction.
  • the diaphragm blade arrangement unit 135 has a second diaphragm blade movement mechanism (not shown) for arranging a plurality of second diaphragm blades 1333 at the second blade position determined by the position determination unit 17.
  • the second diaphragm blade moving mechanism supports each of the plurality of second diaphragm blades 1333 so as to be slidable along the second direction.
  • the second diaphragm blade moving mechanism supports each of the plurality of second diaphragm blades 1333 so as to be slidable beyond an axis (hereinafter referred to as a second central axis) passing through the midpoint and along the first direction. May be.
  • the diaphragm blade arrangement unit 135 is configured to cause a plurality of first diaphragm blades 1331 arranged asymmetrically with respect to the first central axis to be triggered with a predetermined operation via the input unit 25 described later with respect to the first central axis. Placed in symmetrical positions.
  • positioning part 135 is symmetrical with respect to the 1st central axis about the several 1st aperture blade 1331 arrange
  • the diaphragm blade arrangement unit 135 has a function of limiting the arrangement of the first diaphragm blades 1331 and the second diaphragm blades 1333 with the maximum irradiation range as a movement limit.
  • the aperture blade arrangement unit 135 arranges the second shielding plate at the position of the second shielding plate determined by the position determination unit 17 to be described later for each long shooting.
  • FIG. 3 is a perspective view showing an example of a plurality of first and second diaphragm blades and a shielding part 1335 in the X-ray movable diaphragm part 133.
  • the plurality of first diaphragm blades 1331 are configured by first diaphragm blades a and first diaphragm blades b. Each of the first diaphragm blades a and the first diaphragm blades b can move beyond the first central axis.
  • the plurality of second diaphragm blades 1333 are composed of second diaphragm blades a and second diaphragm blades b.
  • Each of the second diaphragm blades a and the second diaphragm blades b may be movable beyond the second central axis.
  • the fact that the X-ray focus has a size (circular shape) instead of a point is due to the fact that the X-ray focus has a tube focus and an out-of-focus X-ray generation point.
  • the first shielding blade a is moved to a position for shielding the out-of-focus X-ray through the first moving mechanism a in conjunction with the movement of the first diaphragm blade a.
  • the first shielding blade b is moved to a position for shielding out-of-focus X-rays through the first moving mechanism b in conjunction with the movement of the first diaphragm blade b.
  • the second shielding blade a is moved to a position for shielding the out-of-focus X-ray through the second moving mechanism a in conjunction with the movement of the second diaphragm blade a.
  • the second shielding blade b is moved to a position for shielding the out-of-focus X-ray through the second moving mechanism b in conjunction with the movement of the second diaphragm blade b.
  • the opening degree information display unit 137 displays opening degree information generated by an opening degree information generation unit 18 described later.
  • the opening degree information is, for example, a visual field size corresponding to the limited irradiation range in FIG.
  • the opening degree information display unit 137 displays, for example, vertical and horizontal sizes related to the visual field size. At this time, the unit of the size to be displayed may be any unit such as centimeter or inch.
  • the bed 15 includes a top plate 151 (also referred to as a saddle table) on which the subject P is placed, and a detector moving unit 155 that moves an X-ray flat panel detector 153 described later in long imaging.
  • the bed 15 may be a see-through bed.
  • the subject P is placed on the top plate 151.
  • the FPD 153 is provided in a top plate 151 described later so as to face the X-ray tube 131.
  • the FPD 153 detects X-rays that have passed through the subject P placed on the top plate 151.
  • the FPD 153 has a plurality of semiconductor detection elements.
  • the semiconductor detection element includes a direct conversion type and an indirect conversion type.
  • the direct conversion type is a type in which incident X-rays are directly converted into electrical signals.
  • the indirect conversion form is a form in which incident X-rays are converted into light by a phosphor and the light is converted into an electrical signal.
  • a / D converter converts an electrical signal into digital data.
  • the A / D converter outputs the digital data to a preprocessing unit (not shown).
  • a preprocessing unit (not shown) performs preprocessing on the digital data output from the FPD 153. Pre-processing includes correction of non-uniform sensitivity between channels in the FPD 153 and correction related to extreme signal degradation or data loss due to an X-ray strong absorber such as metal.
  • the preprocessed digital data is output to an image processing unit 19 described later.
  • the detector moving unit 155 moves the FPD 153 to the detector position determined by the position determining unit 17 described later. Specifically, the detector moving unit 155 moves the FPD 153 for each photographing to a plurality of detector positions corresponding to the number of photographing in the long photographing.
  • the position determination unit 17 determines the first blade position, the second blade position, and the detector position corresponding to each of a plurality of shootings in the long shooting based on the shooting length and the SID in the long shooting. . Specifically, the position determining unit 17 determines the number of times of shooting related to the long shooting based on the shooting length input via the input unit 25 described later and the length of the FPD 153 in the first direction. The position determination unit 17 determines the position of the second shielding plate according to each of a plurality of times of photographing in the long photographing based on the SID and the photographing length in the long photographing regarding the subject.
  • the position determination unit 17 determines the detector position of the FPD 153 corresponding to each of a plurality of shootings based on the number of shootings in long shooting. Specifically, the position determination unit 17 determines the three detector positions corresponding to the three imaging times so as to have a predetermined overlapping width along the first direction.
  • the predetermined overlapping width is, for example, a width (a width corresponding to a margin) used to connect a plurality of medical images generated by long imaging along the first direction.
  • the position determining unit 17 outputs the determined plurality of detector positions to the detector moving unit 155.
  • the position determination unit 17 determines the position of the X-ray tube 131 (hereinafter referred to as the tube) based on the center position of the FPD (hereinafter referred to as FPD center position) in the second imaging in the long imaging and the Z axis. (Referred to as position).
  • the tube position is a position where the tube focus is arranged on a line segment passing through the FPD center position and parallel to the Z axis.
  • the position determination unit 17 outputs the tube position to the support mechanism 13.
  • the position determination unit 17 determines the SID based on the tube position and the FPD center position.
  • the position determination unit 17 determines the midpoint between the arrangement position corresponding to the n-th shooting and the arrangement position corresponding to the (n + 1) -th shooting. Is determined as the FPD center position. Further, when the number of times of photographing is an odd number (for example, 2n + 1: n is a natural number), the position determining unit 17 determines the center position of the detector position in the n-th photographing as the FPD center position.
  • the position determination unit 17 performs the first imaging based on the detector position (hereinafter referred to as the first detector position) corresponding to the first imaging (hereinafter referred to as the first imaging) in the long imaging and the SID. The first blade position and the second blade position are determined. The position determination unit 17 performs the second imaging based on the detector position (hereinafter referred to as the second detector position) corresponding to the second imaging (hereinafter referred to as the second imaging) in the long imaging and the SID. The first blade position and the second blade position are determined. The position determination unit 17 performs the third imaging based on the detector position (hereinafter referred to as the third detector position) corresponding to the third imaging (hereinafter referred to as the third imaging) in the long imaging and the SID. The first blade position and the second blade position are determined. The position determination unit 17 outputs the first blade position and the second blade position corresponding to each of the plurality of photographings to the aperture blade arrangement unit 135 and the opening degree information generation unit 18 described later.
  • the position determination unit 17 may output the first to third detector positions and the first and second blade positions to the storage unit 21 described later. Further, when the SID changes in each of a plurality of photographings, the position determination unit 17 can also determine the first and second blade positions, that is, the aperture of the diaphragm according to the change of the SID. At this time, the position determination part 17 determines the 1st thru
  • the first blade position in the first photographing and the third photographing is asymmetric with respect to the first central axis. Further, the first blade position in the second photographing is symmetric with respect to the first central axis.
  • the opening degree information generating unit 18 generates opening degree information corresponding to each of the first to third imaging based on the first blade position and the second blade position.
  • the opening degree information generation unit 18 outputs the generated opening degree information to the opening degree information display unit 137.
  • the opening degree information generation unit 18 is based on the distance between the positions of the first shielding plate and the second shielding plate and the X-ray focal point, the SID, and the aperture of the limited irradiation range in the X-ray movable diaphragm 133.
  • the X-ray irradiation range on the FPD 153 is calculated.
  • the diaphragm aperture in the X-ray movable diaphragm 133 corresponds to the diaphragm aperture limited by the first diaphragm blade 1331, the second diaphragm blade 1333, and the shield 1335 in the X-ray movable diaphragm 133.
  • the opening degree information generation unit 18 outputs the visual field size corresponding to the calculated irradiation range to the opening degree information display unit 137 as opening degree information.
  • the image processing unit 19 processes a medical image based on digital data output from a preprocessing unit (not shown). Specifically, the image processing unit 19 processes a plurality of medical images respectively corresponding to a plurality of times of photographing in the long photographing. The image processing unit 19 generates a long image obtained by connecting a plurality of medical images related to long photographing in the first direction. The image processing unit 19 outputs the generated long image to the display unit 23 described later.
  • the storage unit 21 includes various medical images and long images generated by the image processing unit 19, a control program for the X-ray diagnostic apparatus 1, a diagnostic protocol, an operator instruction sent from the input unit 25 described later, Various data groups such as photographing conditions and fluoroscopic conditions, a plurality of detector positions and a plurality of blade positions, SIDs, and the like corresponding to a plurality of photographing times in long photographing are stored.
  • the storage unit 21 may store a correspondence table of each of the first and second blade positions with respect to each of the first to third detector positions and the SID. In this case, the position determination unit 17 determines the first and second blade positions based on each of the first to third detector positions, the SID, and the correspondence table.
  • the storage unit 21 may store an X-ray long imaging program.
  • the X-ray long imaging program refers to the first and second blade positions and the first to third detector positions on the computer mounted on the X-ray diagnostic apparatus 1 based on the SID and the imaging length of the long imaging.
  • the first and second diaphragm blades are arranged at the determined first and second blade positions for each of the long photographing, and the FPD 153 is disposed at the determined first to third detector positions. This is a program that is moved for each long shooting.
  • the display unit 23 displays the medical image and the long image generated by the image processing unit 19.
  • the display unit 23 displays an input screen for inputting a long photographing condition such as a photographing range in long photographing, a photographing length, the number of photographs, SID, a photographing condition for X-ray photographing, a fluoroscopic condition for fluoroscopy, and the like. .
  • the input unit 25 inputs a long photographing condition such as a photographing range in long photographing, a photographing length, the number of photographs, SID, a photographing condition for X-ray photographing, a fluoroscopic condition for fluoroscopy, and the like. Specifically, the input unit 25 captures various instructions / commands / information / selections / settings from the operator into the X-ray diagnostic apparatus 1. Although not shown, the input unit 25 includes a trackball for setting a region of interest, a switch button, a mouse, a keyboard, and the like that trigger the execution of long shooting and the start of shooting. The input unit 25 detects the coordinates of the cursor displayed on the display screen, and outputs the detected coordinates to the control unit 27 described later.
  • a long photographing condition such as a photographing range in long photographing, a photographing length, the number of photographs, SID, a photographing condition for X-ray photographing, a fluoroscopic condition for fluoroscopy, and the like.
  • the input unit 25 may be a touch panel provided so as to cover the display screen.
  • the input unit 25 detects the coordinates instructed by touch based on the coordinate reading principle such as electromagnetic induction type, electromagnetic distortion type, and pressure sensitive type, and outputs the detected coordinates to the control unit 27.
  • the input unit 25 is a button (hereinafter referred to as a symmetrical arrangement button) for arranging the first diaphragm blades arranged asymmetrically with respect to the first central axis symmetrically with respect to the first central axis.
  • a symmetrical arrangement button for arranging the first diaphragm blades arranged asymmetrically with respect to the first central axis symmetrically with respect to the first central axis.
  • the control unit 27 includes a CPU (Central Processing Unit) and a memory (not shown).
  • the control unit 27 controls each unit in the X-ray diagnostic apparatus 1 in order to perform X-ray imaging and fluoroscopy in accordance with an operator instruction, imaging conditions, fluoroscopy conditions, and the like sent from the input unit 25.
  • the control unit 27 controls each unit in the X-ray diagnostic apparatus 1 in order to execute long imaging in accordance with an operator instruction and long imaging conditions sent from the input unit 25.
  • the control unit 27 controls the position determination unit 17 in order to determine the first and second blade positions and the first to third detector positions according to a plurality of shootings in the long shooting.
  • the control unit 27 controls the support mechanism 13 in order to place the X-ray tube 131 at the tube position before the start of long imaging.
  • the control unit 27 controls the detector moving unit 155 in order to move the FPD 153 to the first to third detector positions for each shooting in the long shooting.
  • the control unit 27 controls the diaphragm blade placement unit 135 so that the first and second diaphragm blades are disposed at the first and second blade positions for each photographing in the long photographing.
  • the long photographing function is a function for performing long photographing by arranging the first and second aperture blades and moving the FPD 153 without moving the X-ray tube 131. Specifically, first, the first and second blade positions and the first to third detector positions in each of a plurality of shootings in the long shooting are determined based on the shooting length and the SID in the long shooting. The Next, the first and second diaphragm blades are moved to the first and second blade positions for each of a plurality of images in long shooting. The first shielding blade is moved to a position for shielding out-of-focus X-rays through the first movement mechanism in conjunction with the movement of the first diaphragm blade.
  • the second shielding blade is moved to a position for shielding the out-of-focus X-ray through the second moving mechanism in conjunction with the movement of the second diaphragm blade.
  • the FPD 153 is moved to the first to third detector positions for each of a plurality of images in the long image capturing.
  • long shooting processing processing related to the long shooting function (hereinafter referred to as long shooting processing) will be described.
  • the long imaging process is executed, for example, using the spinal column or the lower limb of the subject P as an imaging target according to the purpose of the examination.
  • FIG. 4 is a flowchart illustrating an example of the procedure of the long photographing process.
  • Long shooting is input via the input unit 25 (step Sa1).
  • the input of long shooting is, for example, pressing of a long shooting button in the input unit 25.
  • Long shooting conditions for example, shooting length of long shooting, SID, etc.
  • the number of photographing in the long photographing is determined (step Sa2).
  • the number of photographing is three.
  • the first to third detector positions related to the FPD 153 and the first and second blade positions are determined in association with the number of photographing times (step Sa3). Note that the first and second blade positions, that is, the opening of the diaphragm may be determined after the movement of the FPD 153.
  • step Sa4 After the determination of the first and second blade positions and the first to third detector positions, long shooting is started (step Sa4).
  • the start of long shooting is, for example, pressing of a shooting start button in the input unit 25.
  • the photographing start button When the photographing start button is pressed, the X-ray tube 131 is moved to the tube position by the support mechanism 13. The movement of the X-ray tube 131 to the tube position may be executed by the operator.
  • the FPD 153 is moved to the first detector position related to the first imaging (step Sa5).
  • the first and second diaphragm blades are moved to the first and second blade positions related to the first shooting (step Sa6).
  • one first diaphragm blade for example, the first diaphragm blade a
  • the other first diaphragm blade for example, the first diaphragm blade b
  • the first shielding blade 1337 is moved in conjunction with the movement of the first diaphragm blade 1331 to the first blade position (step Sa7).
  • the second shielding blade 1339 is moved in conjunction with the movement of the second diaphragm blade 1333 to the second blade position (step Sa8).
  • the first and second shielding blades are moved to positions that shield out-of-focus X-rays.
  • step Sa9 When the arrangement of the first and second diaphragm blades and the movement of the FPD 153 are completed, X-rays are generated by the X-ray tube 131 that receives the application of the tube voltage and the supply of the tube current from the high voltage generator 11. Thereby, the first photographing is executed (step Sa9). Until the number of times of shooting equal to the determined number of times of shooting is completed, the processing from step Sa5 to step Sa9 is repeated (step Sa10).
  • the FPD 153 is moved to the second detector position related to the second imaging (step Sa5).
  • the first and second diaphragm blades are respectively moved to the first and second blade positions related to the second photographing (step Sa6).
  • the first blade position is symmetrical with respect to the first central axis.
  • the first shielding blade 1337 is moved in conjunction with the movement of the first diaphragm blade 1331 to the first blade position (step Sa7).
  • the second shielding blade 1339 is moved in conjunction with the movement of the second diaphragm blade 1333 to the second blade position (step Sa8).
  • the FPD 153 is moved to the third detector position related to the third imaging (step Sa5).
  • the first and second diaphragm blades are respectively moved to the first and second blade positions related to the third photographing (step Sa6).
  • one first diaphragm blade for example, the first diaphragm blade a
  • the two first diaphragm blades 1331 exceeds the first central axis and moves to the first blade position (movement of the first diaphragm blade a). Moved to the limit point).
  • the other first diaphragm blade (for example, the first diaphragm blade b) of the two first diaphragm blades 1331 is moved to the first blade position (movement limit point of the first diaphragm blade b).
  • the first shielding blade 1337 is moved in conjunction with the movement of the first diaphragm blade 1331 to the first blade position (step Sa7).
  • the second shielding blade 1339 is moved in conjunction with the movement of the second diaphragm blade 1333 to the second blade position (step Sa8).
  • the third imaging is executed (step Sa9).
  • the X-ray tube 131 remains fixed at the tube position from the first imaging to the third imaging. With the completion of the third imaging, the first diaphragm blade 1331 is moved to a position that is symmetrical with respect to the first central axis.
  • First to third medical images corresponding to the first to third imaging are generated.
  • a long image is generated by combining the first to third medical images with a predetermined overlapping width along the first direction (long axis direction) (step Sa11).
  • the generated long image is displayed on the display unit 23 (step Sa12).
  • the repetition regarding Step Sa5 to Step Sa9 is two times.
  • FIG. 5 is a diagram showing an example of the configuration of the X-ray diagnostic apparatus according to this modification.
  • the detector moving unit 155 is mounted on the imaging table 16.
  • the detector moving unit 155 supports the X-ray flat panel detector 153 so as to be movable in the first direction along the X axis.
  • the X-ray irradiation range is set while the X-ray tube 131 is fixed using the first diaphragm blade 1331 that can move beyond the first central axis.
  • the first and second shielding blades provided on the shielding unit 1335 in the X-ray movable diaphragm 133 are independently moved in conjunction with the first and second diaphragm blades. It becomes possible to make it.
  • an out-of-focus X-ray can be shielded without the operation by an operator.
  • the X-ray diagnostic apparatus 1 in the present embodiment exposure to the subject P due to out-of-focus X-rays is reduced, and in combining (bonding) a plurality of medical images generated in long imaging, It is possible to generate a long image with no geometrical deviation and good bonding accuracy.
  • the X-ray diagnostic apparatus 1 in the first embodiment it is possible to reduce the size without adding a new irradiation field limiting mechanism and without enlarging the X-ray movable diaphragm 133 in the first direction.
  • the X-ray irradiation range can be limited by the X-ray movable diaphragm unit 133 that is lightweight and can be used according to the number of times of photographing in long photographing and the SID.
  • the X-ray movable diaphragm 133 is small, lightweight, and easy to control, and generates a long image with high bonding accuracy. be able to.
  • aperture control can be performed beyond the center of the irradiation field.
  • the first and second shielding blades are provided at positions close to the X-ray focal point, and the first and second shielding blades are moved in conjunction with the movement of the first and second diaphragm blades. Can be shielded.
  • the X-ray movable diaphragm 133 has a more compact shape, and the diaphragm control becomes simpler.
  • the long imaging process in the X-ray movable diaphragm device 3 is as follows.
  • the first and second blade positions are determined based on the imaging length and SID in the long imaging for the subject P.
  • the first and second diaphragm blades are moved to the first and second blade positions according to each of a plurality of shootings in the long shooting.
  • the first and second shielding blades are moved in conjunction with the movement of the first and second diaphragm blades.
  • the subject P is imaged.
  • the movement of the first and second diaphragm blades and the movement of the first and second shielding blades to the first and second blade positions according to the plurality of times of photographing, The imaging of the specimen P is repeated.
  • the X-ray movable diaphragm device 3 that shields out-of-focus X-rays, is small and lightweight, and is easy to control in long imaging. Can be provided.
  • FIG. 6 is a diagram illustrating a configuration of the X-ray movable diaphragm unit 133 in the X-ray diagnostic apparatus 1 according to the second embodiment.
  • the X-ray movable diaphragm 133 includes a plurality of first diaphragm blades 1351 (first shielding plates) movable in a first direction (predetermined direction), and a plurality of second diaphragm blades 1353 movable in a second direction.
  • the third aperture blade 1355 (second shielding plate) is movable in the first direction beyond the midpoint of the length along the first direction in the maximum irradiation range.
  • Each of the first to third diaphragm blades is made of lead that shields X-rays generated by the X-ray tube 131.
  • the diaphragm blade arrangement unit 135 has a plurality of first diaphragm blades 1351 and a plurality of second diaphragm blades at the first to third blade positions determined by the position determination unit 17 in accordance with each of a plurality of shootings in the long shooting. 1353 and the 3rd aperture blade 1353 are each arrange
  • the diaphragm blade arrangement unit 135 has a first diaphragm blade movement mechanism (not shown) for arranging a plurality of first diaphragm blades 1351 at the first blade position determined by the position determination unit 17.
  • the first diaphragm blade moving mechanism supports each of the plurality of first diaphragm blades 1351 so as to be slidable along the first direction.
  • the first diaphragm blade moving mechanism restricts the movement of each of the plurality of first diaphragm blades 1351 so that the first diaphragm blade movement mechanism cannot move beyond the first central axis.
  • the diaphragm blade arrangement unit 135 has a second diaphragm blade movement mechanism (not shown) for arranging a plurality of second diaphragm blades 1353 at the second blade position determined by the position determination unit 17.
  • the second diaphragm blade moving mechanism supports each of the plurality of second diaphragm blades 1353 to be slidable and movable along the second direction.
  • the second diaphragm blade moving mechanism restricts the movement of each of the plurality of second diaphragm blades 1353 so that the second diaphragm blade movement mechanism cannot move beyond the second central axis.
  • the diaphragm blade arrangement unit 135 has a third diaphragm blade movement mechanism (not shown) for arranging the third diaphragm blade at the third blade position determined by the position determination unit 17.
  • the third diaphragm blade moving mechanism slides the third diaphragm blade 1355 beyond the first central axis and supports the third diaphragm blade 1355 so as to be movable.
  • the aperture blade arrangement unit 135 arranges the second shielding plate at the position of the second shielding plate determined by the position determination unit 17 for each shooting of long images.
  • the first aperture blade 1331 is a plurality of first shielding plates.
  • the plurality of first shielding plates limit the maximum irradiation range from both ends of the irradiation range along a predetermined direction.
  • the third aperture blade 1355 is a second shielding plate.
  • the second shielding plate is movable along the predetermined direction at least partially beyond the midpoint of the length along the predetermined direction in the maximum aperture of the irradiation range (the aperture of the maximum irradiation range).
  • FIG. 7 is a plan view showing an example of the structure of the plurality of first diaphragm blades 1351, the plurality of second diaphragm blades 1353, and the third diaphragm blades 1355.
  • the plurality of first diaphragm blades 1351 includes a first diaphragm blade a and a first diaphragm blade b.
  • the first diaphragm blade a and the first diaphragm blade b cannot move beyond the first central axis, respectively.
  • the plurality of second diaphragm blades 1353 includes a second diaphragm blade a and a second diaphragm blade b.
  • the second aperture blade a and the second aperture blade b cannot move beyond the second central axis, respectively.
  • the third aperture blade 1355 is movable along the first direction beyond the first central axis.
  • FIG. 8 is a cross-sectional view showing an example of a cross section along the first central axis and the Z axis in FIG. As shown in FIG. 8, the first to third diaphragm blades have a stacked structure along the Z axis.
  • the position determination unit 17 detects the first blade position, the second blade position, and the third blade position corresponding to each of a plurality of shootings in the long shooting based on the shooting length and the SID in the long shooting. Determine the vessel position. Specifically, the position determination unit 17 determines the number of times of shooting related to long shooting based on the shooting length input via the input unit 25 and the length of the FPD 153 in the first direction. The position determination unit 17 determines the position of the second shielding plate according to each of a plurality of times of photographing in the long photographing based on the SID and the photographing length in the long photographing regarding the subject.
  • the position determination unit 17 determines the detector position of the FPD 153 corresponding to each of a plurality of shootings based on the number of shootings in long shooting. Specifically, the position determination unit 17 determines the three detector positions corresponding to the three imaging times so as to have a predetermined overlapping width along the first direction.
  • the predetermined overlapping width is, for example, a width (a width corresponding to a margin) used to connect a plurality of medical images generated by long imaging along the first direction.
  • the position determining unit 17 outputs the determined plurality of detector positions to the detector moving unit 155.
  • the position determination unit 17 determines the tube position based on, for example, the FPD center position in the second shooting in the long shooting and the Z axis.
  • the tube position is a position where the tube focus is arranged on a line segment passing through the FPD center position and parallel to the Z axis.
  • the position determination unit 17 outputs the tube position to the support mechanism 13.
  • the position determination unit 17 determines the SID based on the tube position and the FPD center position.
  • the position determination unit 17 determines the midpoint between the arrangement position corresponding to the n-th shooting and the arrangement position corresponding to the (n + 1) -th shooting. Is determined as the FPD center position. Further, when the number of times of photographing is an odd number (for example, 2n + 1: n is a natural number), the position determining unit 17 determines the center position of the detector position in the n-th photographing as the FPD center position.
  • the position determination unit 17 determines the first to third blade positions in the first shooting based on the first detector position and the SID corresponding to the first shooting in the long shooting.
  • the position determination unit 17 determines the first to third blade positions in the second imaging based on the second detector position and the SID corresponding to the second imaging in the long imaging.
  • the position determination unit 17 determines the first to third blade positions in the third imaging based on the third detector position and the SID corresponding to the third imaging in the long imaging.
  • the position determination unit 17 outputs the first to third blade positions corresponding to each of the plurality of photographings to the diaphragm blade placement unit 135.
  • the position determination unit 17 may output the first to third detector positions and the first to third blade positions to the storage unit 21 described later. Further, when the SID changes in each of a plurality of photographings, the position determination unit 17 can also determine the first to third blade positions, that is, the aperture of the diaphragm according to the change of the SID. At this time, the position determination part 17 determines the 1st thru
  • the storage unit 21 includes various medical images and long images generated by the image processing unit 19, a control program for the X-ray diagnostic apparatus 1, a diagnostic protocol, an operator instruction sent from the input unit 25 described later, Various data groups such as photographing conditions and fluoroscopic conditions, a plurality of detector positions and a plurality of blade positions, SIDs, and the like corresponding to a plurality of photographing times in long photographing are stored.
  • the storage unit 21 may store a correspondence table of each of the first to third blade positions with respect to each of the first to third detector positions and the SID. In this case, the position determination unit 17 determines the first to third blade positions based on each of the first to third detector positions, the SID, and the correspondence table.
  • the storage unit 21 may store an X-ray long imaging program.
  • the X-ray long imaging program refers to the first to third blade positions and the first to third detector positions on the computer installed in the X-ray diagnostic apparatus 1 based on the SID and the imaging length of the long imaging.
  • the first to third diaphragm blades are arranged at each of the determined first to third blade positions for each long shooting, and the FPD 153 is arranged at the determined first to third detector positions. Is a program for moving the image for each long shooting.
  • the position determination unit 17 determines the first to third blade positions and the first to third detector positions according to a plurality of shootings in the long shooting.
  • the control unit 27 controls the support mechanism 13 in order to place the X-ray tube 131 at the tube position before the start of long imaging.
  • the control unit 27 controls the detector moving unit 155 in order to move the FPD 153 to the first to third detector positions for each shooting in the long shooting.
  • the control unit 27 controls the diaphragm blade placement unit 135 so that the first to third diaphragm blades are disposed at the first to third blade positions for each photographing in the long photographing.
  • the opening degree information generation unit 18 is based on, for example, the distance between the positions of the first shielding plate and the second shielding plate and the X-ray focal point, the SID, and the aperture of the limited irradiation range in the X-ray movable diaphragm unit 133.
  • the X-ray irradiation range on the FPD 153 is calculated.
  • the aperture diameter of the X-ray movable aperture section 133 corresponds to the aperture diameter limited by the first aperture blade 1331, the second aperture blade 1335, and the third aperture blade 1355 in the X-ray movable aperture section 133.
  • the opening degree information generation unit 18 outputs the visual field size corresponding to the calculated irradiation range to the opening degree information display unit 137 as opening degree information.
  • the long photographing function is a function for performing long photographing by arranging the first to third diaphragm blades and moving the FPD 153 without moving the X-ray tube 131. Specifically, first, the first to third blade positions and the first to third detector positions in each of a plurality of shootings in the long shooting are determined based on the shooting length and the SID in the long shooting. The Next, the first to third aperture blades are arranged at the first to third blade positions for each of a plurality of images in the long image shooting. The FPD 153 is moved to the first to third detector positions for each of a plurality of shootings in the long shooting. When the movement of the FPD 153 and the arrangement of the first to third diaphragm blades are completed, the imaging for the subject P is repeated.
  • the long imaging process is executed, for example, using the spinal column or the lower limb of the subject P as an imaging target according to the purpose of the examination.
  • FIG. 9 is a flowchart illustrating an example of the procedure of the long photographing process.
  • Long photographing is input via the input unit 25 (step Sb1).
  • the input of long shooting is, for example, pressing of a long shooting button in the input unit 25.
  • Long shooting conditions for example, shooting length of long shooting, SID, etc.
  • the number of photographing in the long photographing is determined (step Sb2).
  • the number of photographing is three.
  • the first to third detector positions and the first to third blade positions related to the FPD 153 are determined in association with the number of times of photographing (step Sb3).
  • the long photographing is started (step Sb4).
  • the start of long shooting is, for example, pressing of a shooting start button in the input unit 25.
  • the photographing start button is pressed, the X-ray tube 131 is moved to the tube position by the support mechanism 13.
  • the movement of the X-ray tube 131 to the tube position may be executed by the operator.
  • the first to third blade positions that is, the opening of the diaphragm may be determined after the movement of the FPD 153.
  • the shooting start button is pressed, the FPD 153 is moved to the first detector position related to the first shooting (step Sb5).
  • the first to third aperture blades are respectively arranged at the first to third blade positions related to the first photographing (step Sb6).
  • FIG. 10 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the first imaging. As shown in FIG. 10, the third diaphragm blade 1355 is disposed at the third blade position across the first central axis.
  • step Sb7 when the arrangement of the first to third diaphragm blades and the movement of the FPD 153 are completed, X-rays are generated by the X-ray tube 131 that receives the tube voltage and the tube current from the high voltage generator 11. . Thereby, the first photographing is executed (step Sb7).
  • FIG. 11 is a plan view showing an example of a relative positional relationship between the FPD 153 and the first to third diaphragm blades in the X-ray tube 131 and the X-ray movable diaphragm 133 in the first imaging in FIG.
  • a broken line in FIG. 11 indicates an X-ray irradiation range in the first imaging.
  • the arrows in FIG. 11 indicate the movement direction of the first diaphragm blade a toward the second photographing described later, the movement direction of the third diaphragm blade 1355, and the movement direction of the FPD 153.
  • a dotted line in FIG. 11 indicates the position of the FPD and the X-ray irradiation range in the second imaging.
  • step Sb8 The processing from step Sb5 to step Sb7 is repeated until the number of shootings equal to the determined number of shootings is completed (step Sb8). Specifically, when the first shooting is completed, the FPD 153 is moved to the second detector position related to the second shooting (step Sb5). Next, the first to third diaphragm blades are respectively arranged at the first to third blade positions related to the second photographing (step Sb6).
  • FIG. 12 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the second imaging. As shown in FIG. 12, the third diaphragm blade is retracted above the first diaphragm blade a. The third aperture blade may be retracted to the upper surface side of the first aperture blade b.
  • step Sb7 When the arrangement of the first to third aperture blades and the movement of the FPD 153 are completed, the second imaging is executed (step Sb7).
  • FIG. 13 is a plan view showing an example of the relative positional relationship between the FPD 153 and the first to third diaphragm blades in the X-ray tube 131 and the X-ray movable diaphragm 133 in the second imaging in FIG.
  • a broken line in FIG. 13 indicates an X-ray irradiation range in the second imaging.
  • the arrows in FIG. 8 indicate the movement direction of the first diaphragm blade b toward the third photographing described later, the movement direction of the third diaphragm blade 1355, and the movement direction of the FPD 153.
  • a dotted line in FIG. 8 indicates the position of the FPD and the X-ray irradiation range in the third imaging.
  • the FPD 153 is moved to the third detector position related to the third imaging (step Sb5).
  • the first to third aperture blades are respectively arranged at the first to third blade positions related to the third imaging (step Sb6).
  • FIG. 14 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the third imaging. As shown in FIG. 14, the third aperture blade 1355 is disposed at the third blade position across the first central axis.
  • step Sb7 When the arrangement of the first to third aperture blades and the movement of the FPD 153 are completed, the third imaging is executed (step Sb7).
  • FIG. 15 is a plan view showing an example of the relative positional relationship between the FPD 153 and the first to third diaphragm blades in the X-ray tube 131 and the X-ray movable diaphragm 133 in the third imaging in FIG. As shown in FIGS. 11, 13, and 15, the X-ray tube 131 remains fixed at the tube position from the first imaging to the third imaging.
  • the irradiation range is limited by the third diaphragm blade 1355.
  • the third diaphragm blade 1355 is arranged on the upper surface side of the first diaphragm blade a or the first diaphragm blade b.
  • First to third medical images corresponding to the first to third imaging are generated.
  • a long image is generated by combining the first to third medical images with a predetermined overlapping width along the first direction (long axis direction) (step Sb9).
  • the generated long image is displayed on the display unit 23 (step Sb10).
  • FIG. 16 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the first photographing when the number of photographing in the long photographing is two.
  • the third aperture blade 1355 is disposed on the upper surface side of the first aperture blade a.
  • FIG. 17 is a plan view showing an example of the relative positional relationship between the FPD 153 and the first to third diaphragm blades in the X-ray tube 131 and the X-ray movable diaphragm 133 in the first imaging in FIG.
  • the 3rd aperture blade 1355 is arrange
  • FIG. 18 is a diagram illustrating an example of the relative positional relationship of the first to third aperture blades in the second shooting when the number of shootings in the long shooting is two. As shown in FIG. 18, the third aperture blade 1355 is arranged on the upper surface side of the first aperture blade a.
  • FIG. 19 is a plan view showing an example of the relative positional relationship between the FPD 153 and the first to third diaphragm blades in the X-ray tube 131 and the X-ray movable diaphragm 133 in the second imaging in FIG.
  • the third diaphragm blade 1355 is disposed on the upper surface side of the first diaphragm blade a and is retracted from the irradiation range.
  • the detector moving unit 155 is mounted on the imaging table 16.
  • the detector moving unit 155 supports the X-ray flat panel detector 153 so as to be movable in the first direction along the X axis.
  • the third diaphragm blade 1355 that can move beyond the first central axis is used to fix the X-ray tube 131 and fix a plurality of images in long imaging.
  • the X-ray irradiation range of each imaging can be limited. That is, according to the X-ray diagnostic apparatus 1, the third diaphragm blade provided in the X-ray movable diaphragm 133 is slid independently in the first direction in conjunction with the first and second diaphragm blades. Is possible.
  • there is no geometrical deviation in the combination (bonding) of a plurality of medical images generated in long imaging and the bonding accuracy is high. A good long image can be generated.
  • the X-ray diagnostic apparatus 1 in the second embodiment is compact without adding a new irradiation field limiting mechanism and without enlarging the X-ray movable diaphragm 133 in the first direction.
  • the X-ray irradiation range can be limited by the X-ray movable diaphragm unit 133 that is lightweight and can be used according to the number of times of photographing in long photographing and the SID.
  • the X-ray movable diaphragm 133 is small, lightweight, and easy to control, and a long image with good bonding accuracy is obtained. Can be generated.
  • the long imaging process in the X-ray movable diaphragm device 3 is as follows.
  • the first to third blade positions corresponding to the first to third aperture blades are determined based on the imaging length and SID in the long imaging for the subject P, respectively.
  • the first to third aperture blades are arranged at the first to third blade positions according to each of a plurality of shootings in the long shooting.
  • the subject P is imaged. Until the number of times of imaging equal to the number of times of imaging is completed, the arrangement of the first to third aperture blades at the first to third blade positions according to the plurality of times of imaging and the imaging of the subject P are repeated.
  • the X-ray movable diaphragm device 3 according to the second embodiment, it is possible to provide the X-ray movable diaphragm device 3 that is small, lightweight, and easy to control in long imaging. .
  • the X-ray diagnostic apparatus 1 and the X-ray movable diaphragm apparatus 3 that have an X-ray movable diaphragm that can be miniaturized and that are capable of long imaging with high bonding accuracy.
  • each function according to the embodiment can also be realized by installing a program for executing the processing in a computer such as a workstation and developing the program on a memory.
  • a program capable of causing the computer to execute the technique is stored in a storage medium such as a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), or a semiconductor memory. It can also be distributed.
  • the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying constituent elements without departing from the scope of the invention in the implementation stage.
  • various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
  • constituent elements over different embodiments may be appropriately combined.
  • FPD X-ray flat panel detector
  • detector moving section 1331 ... first diaphragm blade, 1333 ... second diaphragm blade, 1335 ... shielding section, 1337 1 shielding blade, 1339 ... second shielding blade, 1341 ... first moving mechanism, 1343 ... second moving mechanism, 1351 ... first diaphragm blade, 1353 ... second diaphragm blade, 1355 ... third diaphragm blade.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018019874A (ja) * 2016-08-03 2018-02-08 キヤノン株式会社 放射線撮影装置、放射線撮影システム、放射線撮影方法、及びプログラム

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6687394B2 (ja) * 2016-01-18 2020-04-22 キヤノンメディカルシステムズ株式会社 Ｘ線診断装置及びｘ線検出器
JP2017153591A (ja) * 2016-02-29 2017-09-07 東芝メディカルシステムズ株式会社 Ｘ線診断装置
CN109350094A (zh) * 2018-12-07 2019-02-19 余姚德诚科技咨询有限公司 射线影像可用性分析机构
KR102548631B1 (ko) * 2021-09-29 2023-06-27 국립암센터 방사선 조사 장치 및 이를 이용한 방사선 조사 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002078707A (ja) * 2000-09-08 2002-03-19 Shimadzu Corp Ｘ線透視撮影台
JP2005192992A (ja) * 2003-12-29 2005-07-21 Ge Medical Systems Global Technology Co Llc コリメータおよびｘ線照射装置並びにｘ線撮影装置
JP2009077759A (ja) * 2007-09-25 2009-04-16 Toshiba Corp Ｘ線診断装置
JP2011019633A (ja) * 2009-07-14 2011-02-03 Toshiba Corp Ｘ線診断装置及び被曝線量低減用制御プログラム
JP2011067509A (ja) * 2009-09-28 2011-04-07 Fujifilm Corp 放射線撮影システム及びその撮影制御方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006141904A (ja) * 2004-11-25 2006-06-08 Hitachi Medical Corp Ｘ線撮影装置
JP2006288554A (ja) * 2005-04-07 2006-10-26 Toshiba Corp Ｘ線診断装置及び画像データ生成方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002078707A (ja) * 2000-09-08 2002-03-19 Shimadzu Corp Ｘ線透視撮影台
JP2005192992A (ja) * 2003-12-29 2005-07-21 Ge Medical Systems Global Technology Co Llc コリメータおよびｘ線照射装置並びにｘ線撮影装置
JP2009077759A (ja) * 2007-09-25 2009-04-16 Toshiba Corp Ｘ線診断装置
JP2011019633A (ja) * 2009-07-14 2011-02-03 Toshiba Corp Ｘ線診断装置及び被曝線量低減用制御プログラム
JP2011067509A (ja) * 2009-09-28 2011-04-07 Fujifilm Corp 放射線撮影システム及びその撮影制御方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018019874A (ja) * 2016-08-03 2018-02-08 キヤノン株式会社 放射線撮影装置、放射線撮影システム、放射線撮影方法、及びプログラム

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JP2014151067A (ja) 2014-08-25
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CN104936527A (zh) 2015-09-23
KR101701660B1 (ko) 2017-02-01

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