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Radiation imaging apparatus and operation method thereof

A technology of radiation imaging and equipment, applied in image communication, equipment for radiological diagnosis, medical science, etc., can solve the problem of useless patients

Inactive Publication Date: 2013-06-19
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pre-exposure is useful for determining proper main exposure conditions, but causes useless radiation exposure for the patient because the X-ray dose applied during pre-exposure is not reflected in the X-ray image

Method used

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  • Radiation imaging apparatus and operation method thereof
  • Radiation imaging apparatus and operation method thereof
  • Radiation imaging apparatus and operation method thereof

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Experimental program
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Effect test

Embodiment Construction

[0051] as in figure 1 As shown in , the X-ray imaging system 2 is composed of an X-ray source 10 , a source controller 11 , an irradiation switch 12 , an electronic cassette 13 , a console 14 , an imaging support 15 and an imaging table 16 . The X-ray source 10 includes an X-ray tube for irradiating X-rays. The source controller 11 controls the operation of the X-ray source 10 . The irradiation switch 12 instructs the X-ray source 10 to start heating up and to start X-ray irradiation. The electronic cassette 13 detects X-rays that have passed through the patient's body (subject), and outputs an X-ray image. The console 14 performs operation control of the electronic cassette 13 and display process of X-ray images. The imaging stand 15 and the imaging table 16 are used in X-ray imaging of a patient in a standing position and in a lying position, respectively. The X-ray source 10, the source controller 11, and the irradiation switch 12 constitute the X-ray generating device ...

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PUM

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Abstract

An X-ray imaging system performs pre-exposure and main exposure to take a single X-ray image. In the pre-exposure, an AEC circuit reads out a dose detection signal outputted from a detection pixel, and compares an integral value of the dose detection signal with a threshold value. When the integral value has reached the threshold value, the AEC circuit stops X-ray emission. A main exposure condition determination unit determines main irradiation time, being one item of a main exposure condition, based on irradiation time in the pre-exposure, an integral dose in the pre-exposure, and a necessary dose required for production of the X-ray image. After that, the main exposure is performed immediately with the determined main irradiation time. Normal pixels perform a charge accumulation operation continuously from the start of the pre-exposure to the end of the main exposure, and the X-ray image is produced from accumulated electric charge.

Description

technical field [0001] The present invention relates to a radiation imaging device and a method of operating the radiation imaging device. Background technique [0002] In the medical field, radiation imaging systems are widely known, for example X-ray imaging systems using X-rays. An X-ray imaging system is composed of an X-ray generating device for generating X-rays and an X-ray imaging device that captures X-ray images by receiving X-rays passing through a patient's body. The X-ray generating apparatus includes an X-ray source for irradiating X-rays to a body of a patient, a source controller for controlling the operation of the X-ray source, and an irradiation switch for issuing an irradiation start signal of X-rays to the source controller. The X-ray imaging apparatus includes an X-ray image detection device that detects an X-ray image by converting X-rays passing through a patient's body into electrical signals, and a console that controls the operation of the X-ray i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/4233A61B6/527A61B6/545A61B6/548A61B6/542H04N23/70H04N23/30A61B6/585H04N5/32
Inventor 田岛崇史
Owner FUJIFILM CORP
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