WO2012029726A1 - Procédé et appareil d'imagerie/affichage d'une image des seins - Google Patents

Procédé et appareil d'imagerie/affichage d'une image des seins Download PDF

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Publication number
WO2012029726A1
WO2012029726A1 PCT/JP2011/069499 JP2011069499W WO2012029726A1 WO 2012029726 A1 WO2012029726 A1 WO 2012029726A1 JP 2011069499 W JP2011069499 W JP 2011069499W WO 2012029726 A1 WO2012029726 A1 WO 2012029726A1
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WO
WIPO (PCT)
Prior art keywords
radiation
image
breast
chest wall
subject
Prior art date
Application number
PCT/JP2011/069499
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English (en)
Japanese (ja)
Inventor
伊藤　渡
山田　雅彦
孝夫 桑原
神谷　毅
哲郎 楠木
大田　恭義
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富士フイルム株式会社
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Publication of WO2012029726A1 publication Critical patent/WO2012029726A1/fr

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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
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/502—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of breast, i.e. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/022—Stereoscopic imaging

Definitions

  • the present invention detects a radiographic image for each imaging direction by irradiating radiation from two different imaging directions to the breast of the subject, and uses the detected two radiographic images to generate a stereoscopic image.
  • the present invention relates to a mammography display method and apparatus for display.
  • stereoscopic viewing can be performed using parallax by displaying a combination of a plurality of images.
  • a stereoscopically viewable image hereinafter referred to as a stereoscopic image or a stereo image
  • a stereoscopic image or a stereo image is generated based on a plurality of images having parallax obtained by photographing the same subject from different directions.
  • stereoscopic images is used not only in the fields of digital cameras and televisions, but also in the field of radiographic imaging. That is, the patient is irradiated with radiation from different directions, the radiation transmitted through the subject is detected by a radiation image detector, and a plurality of radiation images having parallax are obtained, and these radiations are acquired. A stereoscopic image is generated based on the image. And by generating a stereoscopic image in this way, a radiographic image with a sense of depth can be observed, and a radiographic image more suitable for diagnosis can be observed.
  • a mammography imaging apparatus has been proposed as a radiographic imaging apparatus that generates a stereoscopic image as described above, but many of the existing mammography imaging apparatuses are in a direction along the chest wall of a subject, that is, Since the radiation is irradiated from the imaging direction tilted to the left and right when viewed from the subject, the displayed stereoscopic image has a layout in which the chest wall extends along the horizontal direction (see, for example, Patent Document 1). .
  • the breast image is displayed in a layout along the vertical direction of the chest wall, so it is compared with a stereoscopic image with a layout along the horizontal direction of the chest wall. There is a problem that observation is difficult.
  • Patent Document 2 proposes that in an X-ray tomosynthesis mammography imaging system, a radiation image is acquired by irradiating radiation from an imaging direction tilted back and forth when viewed from a subject. No proposal has been made regarding the problems in photographing such stereoscopic images.
  • the present invention obtains two radiation images by irradiating radiation from the imaging direction tilted back and forth when viewed from the subject as described above, and displays a stereoscopic image when the right eye is displayed. It is an object of the present invention to provide a breast image radiographing display method and apparatus capable of observing an appropriate stereoscopic image without causing a visual field conflict between a radiographic image for left eye and a radiographic image for left eye.
  • the breast image radiographing display method of the present invention irradiates the subject's breast with radiation from two different radiographing directions, detects a radiographic image for each radiographing direction by the radiation irradiation, and detects the detected two
  • a breast image radiographing display method for displaying a stereoscopic image using a radiographic image radiations in two radiographing directions are respectively emitted from two focal positions separated from the subject's chest wall in the forward direction.
  • the detected two radiographic images are subjected to mask processing for masking an area near the chest wall, and a stereoscopic image is displayed using the two radiographic images subjected to the mask processing.
  • the breast image radiographing display device of the present invention detects a radiation irradiation unit that irradiates radiation from two different imaging directions on the subject's breast, and a radiographic image for each imaging direction by radiation irradiation of the radiation irradiation unit.
  • a breast image radiographing display device comprising a radiological image detector that performs and a display unit that displays a stereoscopic image using two radiographic images detected by the radiographic image detector
  • the radiation irradiating unit Radiation in two imaging directions is irradiated from two focal positions away from the chest wall in the forward direction, respectively, and mask processing is performed to mask the region near the chest wall on the two radiation images detected by the radiation image detector.
  • a mask processing unit is provided, and the display unit displays a stereoscopic image using two radiographic images subjected to mask processing.
  • the mask processing unit can perform blackening processing as mask processing.
  • the mask processing unit can perform a process of deleting a radiation image near the chest wall as a mask process.
  • the radiation irradiating unit can irradiate the breast perpendicularly to the breast from the direction in which the chest wall of the subject extends as one of the two imaging directions.
  • the display unit can display a stereoscopic image in which the extending direction of the subject's chest wall in the two radiographic images is the vertical direction.
  • the breast image radiographing display method and apparatus of the present invention radiation in two radiographing directions is irradiated to the breast from two focal positions separated from the subject's chest wall in the forward direction, and detection is performed by the radiation irradiation. Since the mask processing that masks the area near the chest wall is performed on the two radiographic images, and the stereo image is displayed based on the radiographic image that has been subjected to the mask processing, the vicinity of the chest wall of the radiographic image for the right eye And the radiation image for the left eye and the vicinity of the chest wall can be displayed in a similar manner, and an appropriate stereo image can be observed without causing the above-described visual field conflict.
  • FIG. 1 is a schematic configuration diagram of a breast image photographing display system using an embodiment of a breast image photographing display device of the present invention.
  • the figure which shows the state which inclined the rotation arm part only by the convergence angle (theta) in the mammography imaging display system shown in FIG. 1 is a block diagram showing a schematic configuration inside a computer of the breast image capturing and displaying system shown in FIG.
  • the figure which shows an example of the radiographic image for right eyes after a mask process, and the radiographic image for left eyes Schematic configuration diagram of a breast image photographing display system using another embodiment of the breast image photographing display device of the present invention.
  • FIG. 1 is a diagram showing a schematic configuration of the entire breast image photographing display system of the present embodiment.
  • a breast image radiographing display system 1 includes a mammography apparatus 10, a computer 2 connected to the mammography apparatus 10, a monitor 3 connected to the computer 2, and an input unit. 4 is provided.
  • the mammography apparatus 10 includes a base 11 and an arm portion 13 supported so as to be movable in the vertical direction with respect to the base 11.
  • the arm section 13 has an alphabet C shape, and a radiation table 16 is attached to one end of the arm section 13 so as to face the imaging table 14 at the other end.
  • the movement of the arm unit 13 in the vertical direction is controlled by an arm controller 31 incorporated in the base 11.
  • the arm unit 13 is composed of two parts. Specifically, the arm unit 13 is the arm unit on the side to which the imaging table 14 is attached, and can be moved only in the vertical direction as described above.
  • a rotation arm portion 13b that is connected to the support arm portion 13a so as to be rotatable about the rotation axis 12 in the direction of arrow A. It is configured. As shown in FIG. 2, the rotation arm 13 b rotates about the rotation axis 12, so that the radiation source 17 of the radiation irradiation unit 16 moves away from the chest wall of the subject M (forward direction). And will move.
  • the rotation of the rotating arm portion 13b is also controlled by the arm controller 31.
  • a radiation image detector 15 such as a flat panel detector, and a detector controller 33 for controlling reading of a charge signal from the radiation image detector 15 are provided.
  • a charge amplifier that converts the charge signal read from the radiation image detector 15 into a voltage signal
  • a correlated double sampling circuit that samples the voltage signal output from the charge amplifier
  • a circuit board provided with an AD conversion unit for converting a voltage signal into a digital signal is also installed.
  • the radiation image detector 15 can repeatedly perform recording and reading of a radiation image, and may use a so-called direct type radiation image detector that directly receives radiation and generates charges. Alternatively, a so-called indirect radiation image detector that converts radiation once into visible light and converts the visible light into a charge signal may be used.
  • a radiation image signal readout method a radiation image signal is read out by turning on / off a TFT (thin film transistor) switch, or by irradiating reading light. It is desirable to use a so-called optical readout system from which a radiation image signal is read out, but the present invention is not limited to this, and other systems may be used.
  • a radiation source 17 and a radiation source controller 32 are accommodated in the radiation irradiation unit 16.
  • the radiation source controller 32 controls the timing of irradiating radiation from the radiation source 17 and the radiation generation conditions (tube current, time, tube current time product, etc.) in the radiation source 17.
  • a compression plate 18 that is arranged above the imaging table 14 and presses against the breast, a support unit 20 that supports the compression plate 18, and a support unit 20 in the vertical direction.
  • a moving mechanism 19 for moving is provided. The position of the compression plate 18 and the compression pressure are controlled by the compression plate controller 34.
  • the computer 2 includes a central processing unit (CPU), a storage device such as a semiconductor memory, a hard disk, and an SSD, and the control unit 8a, the radiation image storage unit 8b, the mask as shown in FIG.
  • a processing unit 8c and a display control unit 8d are configured.
  • the control unit 8a outputs predetermined control signals to the various controllers 31 to 35 to control the entire system. A specific control method will be described in detail later.
  • the radiation image storage unit 8b stores in advance two radiation image signals detected by the radiation image detector 15 by photographing from two different photographing directions.
  • the mask processing unit 8c performs mask processing on the two radiographic image signals stored in the radiographic image storage unit 8b so that the radiographic image signal near the chest wall of the subject M is masked.
  • blackening processing is performed on the chest wall side end portions of the two radiation image signals.
  • the mask process is not limited to the blackening process, and any process may be used as long as the end of the chest wall side of the two radiation image signals is represented by an equivalent image. You may make it perform the process which deletes the edge part by the side of the chest wall of a radiographic image signal.
  • the vicinity of the chest wall of the subject to be subjected to the mask processing means that the radiation image for the right eye and the radiation for the left eye are caused by the fact that the manner in which the radiation is irradiated near the chest wall of the subject differs depending on each imaging direction.
  • This is an area including at least a portion where an image difference is generated between the images.
  • the display control unit 8d performs predetermined signal processing on the masked radiographic image signal subjected to mask processing in the mask processing unit 8c, and then causes the monitor 3 to display a stereo image of the breast of the subject M. Is.
  • the input unit 4 is configured by a pointing device such as a keyboard and a mouse, for example, and accepts input of shooting conditions and shooting start instructions by the photographer.
  • the monitor 3 is configured to be able to display a stereo image using two radiation image signals output from the computer 2.
  • a configuration for displaying a stereo image for example, a radiographic image based on two radiographic image signals is displayed using two screens, and one of the radiographic images is observed by using a half mirror or a polarizing glass. It is possible to adopt a configuration in which a stereo image is displayed by being incident on the right eye of the observer and the other radiation image is incident on the left eye of the observer.
  • two radiographic images may be displayed in a superimposed manner while being shifted by a predetermined amount of parallax, and this may be configured to generate a stereo image by observing with a polarizing glass, or a parallax barrier method and a lenticular method
  • a stereo image may be generated by displaying two radiation images on a stereoscopically viewable 3D liquid crystal.
  • the breast of the subject M is placed on the imaging table 14, and the breast is compressed with a predetermined pressure by the compression plate 18 (S10). At this time, it is assumed that the rotating arm portion 13b is installed in a direction perpendicular to the imaging table 14.
  • the control unit 8a performs radiation irradiation and readout of a radiographic image signal to the radiation source controller 32 and the detector controller 33.
  • a control signal is output.
  • radiation is emitted from the radiation source 17, and a radiation image obtained by photographing the breast from the 0 ° direction is detected by the radiation image detector 15.
  • the radiation image signal is read by the detector controller 33, subjected to predetermined signal processing on the radiation image signal, and stored in the radiation image storage unit 8b of the computer 2 (S14).
  • the control unit 8 a reads a convergence angle ⁇ for capturing a preset stereo image, and outputs information of the read convergence angle ⁇ to the arm controller 31.
  • ⁇ 4 ° is stored in advance as information on the convergence angle ⁇ at this time.
  • the present invention is not limited to this, and an arbitrary convergence angle is set in the input unit 4 by the photographer. Is possible.
  • the arm controller 31 outputs a control signal to the rotating arm unit 13b so that the radiation source 17 rotates ⁇ ° in a direction away from the subject's chest wall. That is, in the present embodiment, a control signal is output so that the rotating arm portion 13b is rotated by 4 ° with respect to a direction perpendicular to the imaging table 14.
  • the second radiographic image is taken in the state where the rotary arm portion 13b is rotated by 4 ° (S16).
  • control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to irradiate the radiation and read out the radiation image.
  • this control signal radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from 4 ° direction is detected by the radiation image detector 15, and the radiation image signal is read by the detector controller 33.
  • the signal processing is performed, it is stored in the radiation image storage unit 8b of the computer 2 (S18).
  • the two radiographic image signals stored in the radiographic image storage unit 8b are output to the mask processing unit 8c, and the mask processing unit 8c performs mask processing on the two radiographic image signals (S20). ).
  • 5A and 5B show an example of a masked radiographic image signal for the right eye and a masked radiographic image signal for the left eye that have been subjected to masking. In the present embodiment, as shown in FIGS. 5A and 5B, the blackening process is performed on the chest wall side end of the radiographic image. *
  • the two mask processed radiographic image signals subjected to mask processing in the mask processing unit 8c are output to the display control unit 8d, and the display control unit 8d performs predetermined processing on these mask processed radiographic image signals. Is applied to the monitor 3, and a stereo image of the breast is displayed on the monitor 3 (S22).
  • the mask processing is performed on the chest wall side end portions of the two radiographic images, that is, the region near the chest wall as described above, so the vicinity of the chest wall of the radiographic image for the right eye
  • the left-eye radiographic image and the chest wall vicinity can be displayed in the same manner, and an appropriate stereo image can be observed without causing a visual field conflict.
  • radiation is irradiated from the 0 ° direction, that is, the direction perpendicular to the breast M, as one of the two radiation images constituting the stereo image. Since the radiographic image is taken, the radiographic image in the 0 ° direction can also be used for observation of a normal two-dimensional breast image.
  • the rotation source 13b is moved to change the imaging direction by rotating the rotary arm 13b.
  • the present invention is not limited to this.
  • the breast imaging / display system shown in FIG. As shown in FIG. 5, the radiation source 17 may be moved by moving the radiation source unit 16 to the side away from the chest wall of the subject M in the horizontal direction (arrow B direction).
  • the mammography display system 5 shown in FIG. 6 has the same configuration as that of the above embodiment except that the radiation source unit 16 can be moved in the horizontal direction as described above.

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Abstract

La présente invention concerne une image stéréoscopique appropriée sans antagonisme visuel entre une image radiologique pour l'œil droit et une image radiologique pour l'œil gauche, au moment de l'affichage de l'image stéréoscopique, les deux images radiologiques étant obtenues en exposant un sujet à un rayonnement provenant des directions d'imagerie inclinées vers l'avant et vers l'arrière du sujet. Le sujet est exposé à un rayonnement provenant des deux directions d'imagerie à partir de deux positions focales éloignées et en face de la cage thoracique du sujet. Les images radiologiques détectées par l'exposition au rayonnement sont soumises à un procédé de masquage de sorte que les zones à proximité de la cage thoracique soient masquées dans les images. Les deux images radiologiques soumises au procédé de masquage sont utilisées pour afficher l'image stéréoscopique.
PCT/JP2011/069499 2010-08-31 2011-08-29 Procédé et appareil d'imagerie/affichage d'une image des seins WO2012029726A1 (fr)

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JP2010-193053 2010-08-31
JP2010193053A JP2012050473A (ja) 2010-08-31 2010-08-31 乳房画像撮影表示方法および装置

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004188200A (ja) * 2002-12-10 2004-07-08 General Electric Co <Ge> 全視野ディジタル式トモシンセシスの方法及び装置
JP2007195663A (ja) * 2006-01-25 2007-08-09 Toshiba Corp 画像表示装置及びプログラム
JP2007229201A (ja) * 2006-03-01 2007-09-13 View Magic:Kk 立体マンモグラフィ装置
JP2008200177A (ja) * 2007-02-19 2008-09-04 Fujifilm Corp マスク領域決定装置、方法、およびプログラム
JP2008289698A (ja) * 2007-05-25 2008-12-04 Toshiba Corp 医用画像表示装置、医用画像表示方法、プログラム、記憶媒体およびマンモグラフィ装置
JP2010167129A (ja) * 2009-01-23 2010-08-05 Fujifilm Corp Ｘ線撮像装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004188200A (ja) * 2002-12-10 2004-07-08 General Electric Co <Ge> 全視野ディジタル式トモシンセシスの方法及び装置
JP2007195663A (ja) * 2006-01-25 2007-08-09 Toshiba Corp 画像表示装置及びプログラム
JP2007229201A (ja) * 2006-03-01 2007-09-13 View Magic:Kk 立体マンモグラフィ装置
JP2008200177A (ja) * 2007-02-19 2008-09-04 Fujifilm Corp マスク領域決定装置、方法、およびプログラム
JP2008289698A (ja) * 2007-05-25 2008-12-04 Toshiba Corp 医用画像表示装置、医用画像表示方法、プログラム、記憶媒体およびマンモグラフィ装置
JP2010167129A (ja) * 2009-01-23 2010-08-05 Fujifilm Corp Ｘ線撮像装置

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