Radiation imaging system, imaging control device, and storage medium

Abstract

A radiation imaging system including: a radiation generator that includes a radiation source generating a radiation pulse by receiving a tube current of a preset amount; a radiation detector that includes a plurality of charge accumulators which accumulate and release electric charges to be read out as signal values according to received radiation and that generates a dynamic image formed of a plurality of frames; and a hardware processor. The hardware processor sets an amount of the tube current and a length of an accumulation time for which the charge accumulators are allowed to accumulate the electric charges, calculates such a proper range of the tube current that start and end of generation of one radiation pulse by the radiation generator are within one accumulation time to perform an imaging with the accumulation time, and regulates setting of a value out of the proper range.

What is claimed is: 
     
         1 . A radiation imaging system comprising:
 a radiation generator that includes a radiation source which generates a radiation pulse by receiving supply of a tube current of a preset amount;   a radiation detector that includes a plurality of charge accumulators which accumulate and release electric charges to be read out as signal values according to received radiation and that generates a dynamic image formed of a plurality of frames; and   a hardware processor that:   sets an amount of the tube current and a length of an accumulation time for which the charge accumulators are allowed to accumulate the electric charges;   calculates such a proper range of the tube current that start and end of generation of one of the radiation pulse by the radiation generator are within one of the set accumulation time to perform an imaging with the set accumulation time; and   regulates setting of a value out of the calculated proper range.   
     
     
         2 . The radiation imaging system according to  claim 1 , wherein
 the hardware processor sets, as the amount of the tube current, a value of an option that is selected from among a displayed option by a user or an arbitrary value that is input by the user, and   the hardware processor regulates the setting of the value out of the calculated proper range.   
     
     
         3 . The radiation imaging system according to  claim 2 , wherein the hardware processor notifies that the value out of the calculated proper range is selected or input in response to selection or inputting of the value out of the calculated proper range. 
     
     
         4 . The radiation imaging system according to  claim 1 , wherein
 the hardware processor is able to set a frame rate,   the hardware processor determines whether or not a value of at least one of the frame rate and the accumulation time set in the radiation generator matches a value of the at least one of the frame rate and the accumulation time set in the radiation detector, and   the imaging is enabled in response to determination by the hardware processor that the value set in the radiation generator matches the value set in the radiation detector.   
     
     
         5 . The radiation imaging system according to  claim 1 , wherein
 the radiation generator applies, to the radiation source, a tube voltage that is set in advance to generate the tube current, and the radiation source generates the radiation pulse for an irradiation time that is set,   the hardware processor is able to set a value of at least one of the tube voltage and the irradiation time,   the hardware processor calculates a proper range of a value of at least one of the tube voltage and the irradiation time according to the set length of the accumulation time, and   the hardware processor regulates setting of the value of the at least one of the tube voltage and the irradiation time out of the calculated proper range.   
     
     
         6 . The radiation imaging system according to  claim 5 , wherein, in response to setting of a second value that is larger than a first value as a parameter value of at least one of the tube current, the tube voltage and the irradiation time, the hardware processor lowers a parameter value that is not set to be the second value among the tube current, the tube voltage and the irradiation time such that a total dose in a single imaging of the dynamic image among the imaging does not exceed a total dose in a single imaging of the dynamic image among the imaging that is performed by setting the first value. 
     
     
         7 . The radiation imaging system according to  claim 1 , wherein
 the hardware processor identifies the connected radiation generator, and   the hardware processor adjusts the proper range of a value to be calculated according to the identified radiation generator.   
     
     
         8 . An imaging control device that controls a radiation generator and a radiation detector, the radiation generator including a radiation source which generates a radiation pulse by receiving supply of a tube current of a preset amount, the radiation detector including a plurality of charge accumulators which accumulate and release electric charges to be read out as signal values according to received radiation and generating a dynamic image formed of a plurality of frames, and the imaging control device comprising a hardware processor that:
 sets an amount of the tube current;   calculates such a proper range of the tube current that start and end of generation of one of the radiation pulse by the radiation generator are within one of an accumulation time which is set in advance to perform an imaging with the set accumulation time; and   regulates setting of a value out of the calculated proper range.   
     
     
         9 . The imaging control device according to  claim 8 , further comprising a display that displays an option of a value which is settable as the amount of the tube current, wherein
 the hardware processor sets, as the amount of the tube current, a value of an option that is selected from among the option displayed on the display by a user or an arbitrary value that is input by the user, and   the hardware processor regulates the setting of the value out of the calculated proper range.   
     
     
         10 . The imaging control device according to  claim 9 , wherein the hardware processor notifies that the value out of the calculated proper range is selected or input in response to selection or inputting of the value out of the calculated proper range. 
     
     
         11 . The imaging control device according to  claim 8 , wherein
 the hardware processor is able to set a frame rate in the radiation generator and the radiation detector,   the hardware processor determines whether or not a value of at least one of the frame rate and the accumulation time set in the radiation generator matches a value of the at least one of the frame rate and the accumulation time set in the radiation detector, and   a permission to perform the imaging is output to at least one of the radiation generator and the radiation detector in response to determination by the hardware processor that the value set in the radiation generator matches the value set in the radiation detector.   
     
     
         12 . The imaging control device according to  claim 8 , wherein
 the hardware processor is able to set a value of at least one of a tube voltage which is applied to the radiation source by the radiation generator to generate the tube current and an irradiation time for which the radiation source generates the radiation pulse,   the hardware processor calculates a proper range of a value of at least one of the tube voltage and the irradiation time according to a length of the set accumulation time, and   the hardware processor regulates setting of the value of the at least one of the tube voltage and the irradiation time out of the calculated proper range.   
     
     
         13 . The imaging control device according to  claim 11 , wherein, in response to setting of a second value that is larger than a first value as a parameter value of at least one of the tube current, a tube voltage and an irradiation time, the hardware processor lowers a parameter value that is not set to be the second value among the tube current, the tube voltage and the irradiation time such that a total dose in a single imaging of the dynamic image among the imaging does not exceed a total dose in a single imaging of the dynamic image among the imaging that is performed by setting the first value. 
     
     
         14 . The imaging control device according to  claim 8 , wherein
 the hardware processor identifies the connected radiation generator, and   the hardware processor adjusts the proper range of a value to be calculated according to the identified radiation generator.   
     
     
         15 . A non-transitory storage medium storing a computer readable program for a computer in an imaging control device that controls a radiation generator and a radiation detector, the radiation generator including a radiation source which generates a radiation pulse by receiving supply of a tube current of a preset amount, the radiation detector including a plurality of charge accumulators which accumulate and release electric charges to be read out as signal values according to received radiation and generating a dynamic image formed of a plurality of frames, and the program causing the computer to perform:
 setting an amount of the tube current;   calculating such a proper range of the tube current that start and end of generation of one of the radiation pulse by the radiation generator are within one of an accumulation time which is set in advance to perform an imaging with the set accumulation time; and   regulating setting of a value out of the calculated proper range.