Claims
- 1. A digital radiography system comprising:
- an X-ray source irradiating an object to be inspected with X-rays;
- an X-ray image intensifier tube receiving the X-rays which passes through the object and converting the received X-rays into an output optical image, a diameter of an image input area of said X-ray image intensifier tube ranging from 305 to 406 mm, a diameter of an image output area of said X-ray image intensifier tube ranging from 58 to 62 mm, and a ratio of the diameter of the image input area to the diameter of the image output area ranging from 5 to 7;
- a video camera picking up the output optical image formed in the image output area of the X-ray image intensifier tube, said video camera having a plurality of scanning modes including a fluoroscopic mode and a radiographic imaging mode, said fluoroscopic mode monitoring a real-time X-ray image of the object irradiated by the X-rays, and said radiographic imaging mode recording an X-ray image of the object irradiated by the X-rays, said video camera having a beam scanning area on an image pickup surface thereof which is the same for both said fluoroscopic mode and said radiographic imaging mode;
- an optical system including a plurality of lenses, said optical system being disposed between said X-ray image intensifier tube and said video camera so as to output substantially the same size output optical image formed in the image output area of the X-ray image intensifier tube on the video camera in both of said fluoroscopic mode and said radiographic imaging mode wherein said optical system includes a combination of a mirror and said plurality of lenses, said plurality of lenses including a primary lens system receiving the output optical image from the X-ray image intensifier tube and a secondary lens system focusing the output optical image of the X-ray image intensifier tube on said video camera, said mirror being disposed between lenses included in the primary lens system to deflect a light path in the primary lens system by about 90.degree.;
- image processing means for converting an output from said video camera into a digital signal to obtain digital image data; and
- image display means for displaying an X-ray image by reading out said digital image data from said image processing means.
- 2. A digital radiography system according to claim 1, wherein the plurality of scanning modes include a scanning mode in which a number of scanning lines is 4200.
- 3. A digital radiography system according to claim 1, wherein a size of an image detection part constituted of said X-ray image intensifier tube and said video camera ranges from 700 to 800 mm in a direction parallel to a center axis of said X-ray image intensifier tube, and the image detection part is mounted to a table on which the object is positioned.
- 4. A digital radiography system comprising:
- an X-ray source irradiating an object to be inspected with X-rays;
- an X-ray image intensifier tube receiving the X-rays which passes through the object and converting the received X-rays into an output optical image, a diameter of an image input area of said X-ray image intensifier tube ranging from 305 to 406 mm, a diameter of an image output area of said X-ray image intensifier tube ranging from 58 to 62 mm, and a ratio of the diameter of the image input area to the diameter of the image input area ranging from 5 to 7;
- a video camera picking up the output optical image formed in the image output area of the X-ray image intensifier tube, said video camera having a plurality of scanning modes and a beam scanning surface thereof which is the same for all of said plurality of scanning modes;
- an optical system being disposed between said X-ray image intensifier tube and said video camera so as to output substantially the same size output optical image formed in the image output area of the X-ray image intensifier tube on the video camera in all of said plurality of scanning modes, wherein said optical system includes a combination of a mirror and a plurality of lenses, said plurality of lenses includes a primary lens system receiving the output optical image from the X-ray image intensifier tube and a secondary lens system focusing the output optical image of the X-ray image intensifier tube on said video camera, said mirror being disposed between lenses included in the primary lens system to deflect a light path in the primary lens system by about 90.degree.;
- image processing means for converting an output from said video camera into a digital signal to obtain digital image data; and
- image displaying means for displaying an X-ray image by reading out said digital image data from said image processing means.
- 5. A digital radiography system according to claim 4, wherein said plurality of scanning modes include a scanning mode in which a number of scanning lines is 4200.
- 6. A digital radiography system according to claim 4, wherein a size of an image detection part constituted of said X-ray image intensifier tube and said video camera ranges from 700 to 800 mm in a direction parallel to a center axis of said X-ray image intensifier tube, and the image detection part is mounted to a table on which the object is positioned.
- 7. A digital radiography system comprising:
- an X-ray source irradiating an object to be inspected with X-rays;
- an X-ray image intensifier tube receiving the X-rays which passes through the object and converting the received X-rays into an output optical image, a diameter of an image input area of said X-ray image intensifier tube ranging from 305 to 406 mm, a diameter of an image output area of said X-ray image intensifier tube ranging from 58 to 62 mm, and a ratio of the diameter of the image input area to the diameter of the image output area ranging from 5 to 7;
- a video camera picking up the output optical image formed in the image output area of the X-ray image intensifier tube, said video camera having a plurality of scanning modes including a fluoroscopic mode and a radiographic imaging mode, said fluoroscopic mode monitoring a real-time X-ray image of the object irradiated by the X-rays, and said radiographic imaging mode recording an X-ray image of the object irradiated by the X-rays, said video camera having a beam scanning area on an image pickup surface thereof which is the same for both said fluoroscopic mode and said radiographic imaging mode, and a beam scanning area on the image pickup surface of the video camera is 30 mm.times.30 mm to 32 mm.times.32 mm, and the plurality of scanning modes include a scanning mode in which a number of scanning lines is 4200;
- an optical system including a plurality of lenses, said optical system being disposed between said X-ray image intensifier tube and said video camera so as to output substantially the same size output optical image formed in the image output area of the X-ray image intensifier tube on the video camera in both said fluoroscopic mode and said radiographic imaging mode;
- image processing means for converting an output from said video camera into a digital signal to obtain digital image data; and
- image display means for displaying an X-ray image by reading out said digital image data from said image processing means.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-308906 |
Nov 1990 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/400,287, filed Mar. 3, 1995, which is a continuation of application Ser. No. 08/141,722, filed Oct. 25, 1993, now abandoned, which is a continuation of application Ser. No. 07/791,378, filed Nov. 14, 1991, now abandoned.
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Foreign Referenced Citations (1)
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DEX |
Continuations (3)
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Number |
Date |
Country |
Parent |
400287 |
Mar 1995 |
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Parent |
141722 |
Oct 1993 |
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Parent |
791378 |
Nov 1991 |
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