JP2014239842A5 - - Google Patents

Claims (20)

An X-ray imaging apparatus having an X-ray generation means for generating X-rays and an X-ray imaging means having an image imaging means for imaging the X-ray image, wherein the X-ray imaging means includes:
A determination unit that determines whether or not communication is performed between the X-ray generation unit and the X-ray imaging unit to synchronize the timing of X-ray generation and the drive timing of the X-ray imaging unit;
Setting means for setting a driving method of the image photographing means according to the determination;
An X-ray imaging apparatus comprising: The determination means includes
When the determination signal for determining whether or not the communication is performed is transmitted to the X-ray generation unit, and the response signal for the determination signal is received from the X-ray generation unit, the X-ray generation unit And the X-ray imaging means are determined to be in a connection state in which synchronized communication is performed,
The X-ray generation unit and the X-ray imaging unit are determined to be in a connection state in which asynchronous communication is performed when a response signal to the determination signal is not received from the X-ray generation unit. The X-ray imaging apparatus according to 1.   The setting means sets the accumulation time of the image photographing means in the connection state where the asynchronous communication is performed shorter than the accumulation time of the image photographing means in the connection state where the synchronous communication is performed. The X-ray imaging apparatus according to claim 2.   The setting means has a shooting mode with a shorter storage time than the shooting mode of the image shooting means in the connection state in which the synchronized communication is performed as the shooting mode of the image shooting means in the connection state in which the asynchronous communication is performed. The X-ray imaging apparatus according to claim 3, wherein the X-ray imaging apparatus is set. The image photographing means has a sensor array in which a plurality of conversion elements that convert the X-rays into electric charges are arranged,
The setting means changes the accumulation time by changing at least one of a timing for starting accumulation of the charge in the conversion element and a timing for starting reading of the charge accumulated in the conversion element. The X-ray image photographing apparatus according to claim 3 or 4, wherein:   When the X-ray generation unit and the X-ray imaging unit are in a connection state in which synchronized communication is performed, the setting unit is configured to perform the driving by communication between the X-ray generation unit and the X-ray imaging unit. The X-ray imaging apparatus according to any one of claims 2 to 4, wherein a method is set. The X-ray imaging means includes
An acquisition means for acquiring a plurality of dark current images in a connection state in which the asynchronous communication is performed;
A charge determination unit that compares the charges of the plurality of dark current images with the charges at the time of irradiation with the X-rays and determines whether or not the X-rays are irradiated at the time of accumulation of dark current charges;
The processing unit according to any one of claims 2 to 6, further comprising processing means for processing an image at the time of accumulation of the dark current charge as an X-ray image when the X-ray is irradiated. The X-ray imaging apparatus described. The X-ray imaging means includes
A selection means for selecting an imaging region of the subject;
A dose determining means for determining a dose of X-rays according to the imaging region;
Further comprising
The said setting means sets the drive method of the said image pick-up means using the determination result and the determination result of the said X-ray irradiation amount, The any one of Claim 2 thru | or 7 characterized by the above-mentioned. An X-ray imaging apparatus described in 1. When the determination result is a connection state in which asynchronous communication is performed, and the determination result of the X-ray dose is equal to or higher than a threshold X-ray dose,
The setting means sets the accumulation time of the image photographing means in the connection state where the asynchronous communication is performed shorter than the accumulation time of the image photographing means in the connection state where the synchronous communication is performed. The X-ray imaging apparatus according to claim 8. The X-ray imaging means includes
10. A preprocessing unit for correcting the X-ray image by taking a difference between dark current images from an X-ray image captured by the driving method of the image capturing unit. The X-ray imaging apparatus of Claim 1.   The preprocessing means acquires the X-ray image at the accumulation time of the image photographing means in a connection state in which the asynchronous communication is performed, and a dark current image at an image accumulation time equal to the accumulation time of the image photographing means. The X-ray imaging apparatus according to claim 10, wherein the X-ray image is corrected by taking a difference of the dark current image from the X-ray image. The X-ray imaging means includes
The X-ray image capturing apparatus according to claim 2, further comprising an image processing unit that performs image processing on an X-ray image captured by the driving method of the image capturing unit. .   The image processing means reduces noise included in the X-ray image by frequency processing in which an enhancement coefficient at a specific frequency is increased with respect to an X-ray image captured in a connection state in which asynchronous communication is performed. The X-ray imaging apparatus according to claim 12. An X-ray imaging apparatus having an X-ray generation means for generating X-rays and an X-ray imaging means having an image imaging means for imaging the X-ray image, wherein the X-ray imaging means includes:
Output means for outputting a signal indicating that the X-ray imaging means is irradiated with X-rays;
Setting means for setting a driving method of the image photographing means according to the signal;
An X-ray imaging apparatus comprising: The setting means includes
Calculating means for calculating a time change of the signal;
The X-ray imaging apparatus according to claim 14, wherein an accumulation time of the imaging unit is set according to the calculation result. The setting means includes
The X-ray imaging apparatus according to claim 15, wherein the accumulation time is set according to a threshold value of the signal.   An X-ray imaging system comprising the X-ray imaging apparatus according to claim 1. A control method for an X-ray imaging apparatus, comprising: an X-ray generation unit that generates X-rays;
Whether the determination unit of the X-ray imaging unit communicates between the X-ray generation unit and the X-ray imaging unit to synchronize the timing of X-ray generation and the drive timing of the X-ray imaging unit A determination step of determining whether or not,
A setting step in which the setting unit of the X-ray imaging unit sets a driving method of the image imaging unit according to the determination;
A control method for an X-ray imaging apparatus, comprising: A control method for an X-ray imaging apparatus, comprising: an X-ray generation unit that generates X-rays;
A determination step in which a determination unit of the X-ray imaging unit determines a bias signal of the X-ray imaging unit;
A setting step in which the setting unit of the X-ray imaging unit sets a driving method of the image imaging unit according to the determination;
A control method for an X-ray imaging apparatus, comprising:   The program for functioning a computer as each means of the X-ray imaging apparatus of any one of Claims 1 thru | or 16.