Radiographic system, automatic exposure control method of radiographic system, and radiological image detector
First Claim
1. A radiographic system havinga radiation source that irradiates an object with radiation,a source controller that controls the radiation source, anda radiological image detector that receives the radiation passing through the object to detect a radiological image and that has an AEC sensor used to perform an automatic exposure control of detecting the dose of the radiation passing through the object and stopping irradiation with the radiation from the radiation source when the integrated value of the detected dose reaches a predetermined irradiation-stop threshold,the radiographic system comprising:
- an information acquiring part for acquiring position information of a detection field of an old AEC sensor;
a detection field selecting part for selecting a detection field of the AEC sensor so as to match the detection field of the old AEC sensor on the basis of the position information of the detection field acquired by the information acquiring part; and
a first storage part for storing source information in which a source ID specific to the radiation source and the position information of the detection field of the old AEC sensor are correlated with each other,wherein the information acquiring part acquires the source ID and acquires the position information by searching for and extracting the position information corresponding to the acquired source ID from the source information.
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Accused Products
Abstract
When an AEC sensor is changed, the same AEC as before changing the AEC sensor is carried out without modifying an existing apparatus. A storage and search unit of a console acquires a source ID and searches for and extracts position information of a detection field of an old AEC sensor corresponding to the acquired source ID from source information of a storage device. An electronic cassette includes plural detection pixels as a new AEC sensor short-circuited to signal lines without passing through TFTs in the same imaging plane as pixels. A detection field selecting circuit of an AEC unit of the electronic cassette selects a detection signal from the detection pixel existing at the position of the detection field of the old AEC sensor among the detection signals of the plural detection pixels.
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Citations
21 Claims
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1. A radiographic system having
a radiation source that irradiates an object with radiation, a source controller that controls the radiation source, and a radiological image detector that receives the radiation passing through the object to detect a radiological image and that has an AEC sensor used to perform an automatic exposure control of detecting the dose of the radiation passing through the object and stopping irradiation with the radiation from the radiation source when the integrated value of the detected dose reaches a predetermined irradiation-stop threshold, the radiographic system comprising: -
an information acquiring part for acquiring position information of a detection field of an old AEC sensor; a detection field selecting part for selecting a detection field of the AEC sensor so as to match the detection field of the old AEC sensor on the basis of the position information of the detection field acquired by the information acquiring part; and a first storage part for storing source information in which a source ID specific to the radiation source and the position information of the detection field of the old AEC sensor are correlated with each other, wherein the information acquiring part acquires the source ID and acquires the position information by searching for and extracting the position information corresponding to the acquired source ID from the source information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An automatic exposure control method of a radiographic system having
a radiation source that irradiates an object with radiation, a source controller that controls the radiation source, and a radiological image detector that receives the radiation passing through the object to detect a radiological image and that has an AEC sensor used to perform an automatic exposure control of detecting the dose of the radiation passing through the object and stopping irradiation with the radiation from the radiation source when the integrated value of the detected dose reaches a predetermined irradiation-stop threshold, the automatic exposure control method comprising: -
an information acquiring step of acquiring position information of a detection field of an old AEC sensor, and acquiring source ID from a first storage part in which the source ID specific to the radiation source and the position information of the detection field of the old AEC sensor are correlated with each other, wherein the information acquiring step of acquiring the source ID and acquiring the position information comprises searching for and extracting the position information corresponding to the acquired source ID from the source information; and a detection field selecting step of selecting a detection field of the AEC sensor so as to match the detection field of the old AEC sensor on the basis of the position information of the detection field acquired in the information acquiring step.
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21. A radiological image detector that receives radiation passing through an object to detect a radiological image, comprising:
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an AEC sensor that performs an automatic exposure control of detecting the dose of the radiation passing through the object and stopping irradiation with the radiation from a radiation source when the integrated value of the detected dose reaches a predetermined irradiation-stop threshold, wherein a detection field of the AEC sensor is selected so as to match a detection field of an old AEC sensor on the basis of the position information of the detection field of the old AEC sensor and a source ID specific to the radiation source, wherein the source ID and the position information of the detection field of the old AEC sensor are correlated with each other in source information, wherein the position information is obtained by searching for and extracting the position information corresponding to the source ID from the source information.
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Specification