Electronic radiography system and signal relay device
AssigneeFUJIFILM Corporation
InventorRyou Imamura
Life of this patent
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Abstract
A signal relay device comprises a first connection I/F, to which an emission switch is connected, a second connection I/F, to which an emission signal I/F of an electronic cassette is connected, and a third connection I/F, to which a switch I/F of a source control device is connected, and a signal processing unit. The signal processing unit generates an emission execution signal during a time period in which an emission command signal from the emission switch and an emission enable signal from the electronic cassette are inputted. The source control device drives an X-ray tube to allow X-ray emission while the emission execution signal is inputted.
Claims17
An electronic radiography system comprising:
- (A) a radiation generating apparatus comprising:
- a radiation source for emitting radiation to a subject;
- an emission switch for generating an emission command signal to command start of emission of the radiation;
- and
- a source control device having a switch I/F to which the emission command signal is inputted, the source control device allowing the radiation source to emit the radiation for radiography while the emission command signal is inputted;
- (B) an electronic radiographic image detection device comprising:
- a sensor panel for converting the radiation passed through the subject into an electric signal during the radiography and outputting a radiographic image of the subject;
- a dose measurement sensor for measuring a dose of the radiation during the radiography;
- and
- a controller for generating an emission enable signal, the emission enable signal determining a time period from a time when the emission is enabled in response to the emission command signal until a time for stopping the emission, the time for stopping the emission being determined by the controller through determining that a radiation exposure dose of the subject has reached a predetermined value based on measurement with the dose measurement sensor;
- and
- (C) a signal relay device comprising:
- a first connection I/F for receiving the emission command signal from the emission switch;
- a second connection I/F for transmitting the emission command signal to the electronic radiographic image detection device and receiving the emission enable signal from the electronic radiographic image detection device;
- a signal processing unit for generating an emission execution signal based on the emission command signal and the emission enable signal;
- and
- a third connection I/F for transmitting the emission execution signal to the switch I/F of the source control device,
- wherein the signal relay device is provided separately from the radiation generating apparatus.
A signal relay device used in an electronic radiography system comprising a radiation generating apparatus and an electronic radiographic image detection device, the radiation generating apparatus emitting radiation to a subject in response to input of an emission execution signal, the electronic radiographic image detection device detecting a radiographic image based on the radiation passed through the subject, the electronic radiographic image detection device generating an emission enable signal, the emission enable signal determining a time period from a time when emission of the radiation is enabled in response to an emission command signal until a time for stopping the emission, the time for stopping the emission being determined by determining that a radiation exposure dose of the subject has reached a predetermined value based on measurement with a dose measurement sensor, the signal relay device comprising:
- a first connection I/F for receiving the emission command signal from an emission switch, being a component of the radiation generating apparatus;
- a second connection I/F for transmitting the emission command signal to the electronic radiographic image detection device and receiving the emission enable signal from the electronic radiographic image detection device;
- a signal processing unit for generating the emission execution signal based on the emission command signal and the emission enable signal;
- and
- a third connection I/F for transmitting the emission execution signal to the source control device,
- wherein the signal relay device is provided separately from the radiation generating apparatus.
Dependencies are inferred from the claim text.