Radiation image read-out method and apparatus
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0513187
(1995-08-09)
|
우선권정보 |
JP-0249613 (1994-10-14); JP-0289511 (1994-11-24); JP-0289512 (1994-11-24) |
발명자
/ 주소 |
- Yasuda Hiroaki (Kanagawa-ken JPX)
|
출원인 / 주소 |
- Fuji Photo Film Co., Ltd. (Kanagawa JPX 03)
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
4 |
초록
▼
A stimulable phosphor sheet, on which a radiation image has been stored, is exposed to stimulating rays, which cause it to emit light in proportion to the amount of energy stored thereon during its exposure to radiation. The light, which is emitted from the front surface of the stimulable phosphor s
A stimulable phosphor sheet, on which a radiation image has been stored, is exposed to stimulating rays, which cause it to emit light in proportion to the amount of energy stored thereon during its exposure to radiation. The light, which is emitted from the front surface of the stimulable phosphor sheet, and the light, which is emitted from the back surface of the stimulable phosphor sheet, are detected respectively with two photoelectric read-out devices, and two image signals are thereby obtained. The two image signals are added to each other in a predetermined addition ratio. A change of the addition ratio with the passage of time is compensated for by detecting predetermined reference light with the two photoelectric read-out devices, two reference signals being thereby obtained, calculating a representative value of each of the two reference signals, two representative values being thereby obtained, and utilizing the ratio between the two representative values for the compensation for the change of the addition ratio.
대표청구항
▼
A radiation image read-out method comprising the steps of: i) exposing a stimulable phosphor sheet, on which a radiation image has been stored, to stimulating rays, which have been produced by a stimulating ray source and cause the stimulable phosphor sheet to emit light in proportion to the amount
A radiation image read-out method comprising the steps of: i) exposing a stimulable phosphor sheet, on which a radiation image has been stored, to stimulating rays, which have been produced by a stimulating ray source and cause the stimulable phosphor sheet to emit light in proportion to the amount of energy stored thereon during its exposure to radiation, ii) photoelectrically detecting the light, which is emitted from the front surface of the stimulable phosphor sheet, and the light, which is emitted from the back surface of the stimulable phosphor sheet, respectively with two photoelectric read-out means, two image signals being thereby obtained, and iii) adding the two image signals to each other in a predetermined addition ratio, an addition image signal, which represents the radiation image, being thereby obtained, wherein the improvement comprises the steps of: a) photoelectrically detecting predetermined reference light with the two photoelectric read-out means, two reference signals being thereby obtained, b) calculating a representative value of each of the two reference signals, two representative values being thereby obtained, c) calculating the ratio between said two representative values, and d) compensating for a change of the addition ratio with the passage of time in accordance with said ratio between said two representative values.
이 특허에 인용된 특허 (4)
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Komaki Takao (Minami-ashigara JPX) Matsumoto Seiji (Minami-ashigara JPX) Ishida Masamitsu (Minami-ashigara JPX), Method of processing radiographic image.
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Horikawa Kazuo (Kaisei JPX) Watanabe Hideo (Kaisei JPX), Multiple laser beam scanner with beam intensity control.
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Tanaka Kazuyoshi (Minami-ashigara JPX) Kato Hisatoyo (Minami-ashigara JPX) Matsumoto Seiji (Minami-ashigara JPX), Radiation image read out device.
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Arakawa Satoshi (Kanagawa JPX), Superposition processing method and apparatus for radiation images.
이 특허를 인용한 특허 (8)
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Diepstraten Leonardus J. M.,NLX, Image pick-up apparatus and x-ray examination apparatus including a correction system.
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Christenson, Jason John, Lightweight commercial dumpster.
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Yasuda Hiroaki,JPX ; Iwakiri Naoto,JPX, Method of and apparatus for reading radiation images and correcting shading and/or fading of the images.
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Hiroaki Yasuda JP, Radiation image information read-out method and apparatus.
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Yasuda, Hiroaki, Radiation image information read-out method and apparatus.
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Isoda, Yuji; Nishihata, Sumihiro; Arakawa, Satoshi; Takahashi, Kenji; Miyagawa, Ichirou; Kohda, Katsuhiro, Radiation image read-out method and apparatus.
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Isoda, Yuji; Nishihata, Sumihiro; Arakawa, Satoshi; Takahashi, Kenji; Miyagawa, Ichirou; Kohda, Katsuhiro, Radiation image read-out method and apparatus.
-
Murakoshi,Dai, Radiation image read-out method and apparatus.
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