Radiation imaging apparatus and method for controlling radiation imaging apparatus

A control method in a radiation imaging apparatus that includes:

• a C-arm;
• a radiation source configured to irradiate a subject with radiation;
• and
• a two-dimensional detection device configured to detect the radiation having passed through the subject,
• wherein the radiation source and the two-dimensional detection device are arranged to face each other across the C-arm, wherein the radiation source is attached to the C-arm via a first sub-arm that is rotatably connected to the frame of the C-arm at the inside from one end portion of the frame, and the two-dimensional detection device is attached to the C-arm via a second sub-arm that is rotatably connected to the frame of the C-arm at the inside from the other end portion of the frame,
• a radiation source shift unit provided between the radiation source and the first sub-arm and configured to move the radiation source towards the first sub-arm, and
• a detection device shift unit provided between the two-dimensional detection device and the second sub-arm and configured to move the two-dimensional detection device towards the second sub-arm, the method comprising:
• shifting the radiation source by the radiation source shift unit, according to an angle of rotation of the first sub-arm, to maintain the radiation source aligned with an imaging axis linking the radiation source, which has not yet been moved, and the two-dimensional detection device, or
• shifting the two-dimensional detection device by the detection device shift unit, according to an angle of rotation of the second sub-arm, to maintain the two-dimensional detection device aligned with an imaging axis linking the two-dimensional detection device, which has not yet been moved, and the radiation source.

A control method in a radiation imaging apparatus that includes:

• a C-arm;
• a radiation source configured to irradiate a subject with radiation;
• and
• a two-dimensional detection device configured to detect the radiation having passed through the subject, wherein the radiation source and the two-dimensional detection device are arranged to face each other across the C-arm, wherein the radiation source is attached to the C-arm via a first sub-arm that is rotatably connected to the frame of the C-arm at the inside from one end portion of the frame, and the two-dimensional detection device is attached to the C-arm via a second sub-arm that is rotatably connected to the frame of the C-arm at the inside from the other end portion of the frame,
• a radiation source shift unit provided between the radiation source and the first sub-arm and configured to move the radiation source towards the first sub-arm, and
• a detection device shift unit provided between the two-dimensional detection device and the second sub-arm and configured to move the two-dimensional detection device towards the second sub-arm, the method comprising:
• shifting the radiation source by the radiation source shift unit to maintain the radiation source aligned with an imaging axis passing through the center of the two-dimensional detection device changed by the movement of the second sub-arm, or
• shifting the two-dimensional detection device by the detection device shift unit to maintain the two-dimensional detection device aligned with an imaging axis passing through the center of the radiation source changed by the movement of the first sub-arm.

A computer-readable storage medium storing a program that controls a radiation imaging apparatus that includes:

• a C-arm;
• a radiation source configured to irradiate a subject with radiation;
• and
• a two-dimensional detection device configured to detect the radiation having passed through the subject, wherein the radiation source and the two-dimensional detection device are arranged to face each other across a C-arm, wherein the radiation source is attached to the C-arm via a first sub-arm that is rotatably connected to the frame of the C-arm at the inside from one end portion of the frame, and the two-dimensional detection device is attached to the C-arm via a second sub-arm that is rotatably connected to the frame of the C-arm at the inside from the other end portion of the frame,
• a radiation source shift unit provided between the radiation source and the first sub-arm and configured to move the radiation source towards the first sub-arm, and
• a detection device shift unit provided between the two-dimensional detection device and the second sub-arm and configured to move the two-dimensional detection device to the second sub-arm, the program comprising:
• computer-executable instructions for shifting the radiation source by the radiation source shift unit, according to an angle of rotation of the first sub-arm, to maintain the radiation source aligned with an imaging axis linking the radiation source, which has not yet been moved, and the two-dimensional detection device, or
• computer-executable instructions for shifting the two-dimensional detection device by the detection device shift unit, according to an angle of rotation of the second sub-arm, to maintain the two-dimensional detection device aligned with an imaging axis linking the two-dimensional detection device, which has not yet been moved, and the radiation source.

A computer-readable storage medium storing a program that controls a radiation imaging apparatus that includes:

• a C-arm;
• a radiation source configured to irradiate a subject with radiation;
• and
• a two-dimensional detection device configured to detect the radiation having passed through the subject, wherein the radiation source and the two-dimensional detection device are arranged to face each other across a C-arm, wherein the radiation source is attached to the C-arm via a first sub-arm that is rotatably connected to the frame of the C-arm at the inside from one end portion of the frame, and the two-dimensional detection device is attached to the C-arm via a second sub-arm that is rotatably connected to the frame of the C-arm at the inside from the other end portion of the frame,
• a radiation source shift unit provided between the radiation source and the first sub-arm and configured to move the radiation source towards the first sub-arm, and
• a detection device shift unit provided between the two-dimensional detection device and the second sub-arm and configured to move the two-dimensional detection device towards the second sub-arm, the program comprising:
• computer-executable instructions for shifting the radiation source by the radiation source shift unit to maintain the radiation source aligned with an imaging axis passing through the center of the two-dimensional detection device changed by the movement of the second sub-arm, or a shift step in which the detection device shift unit moves the two-dimensional detection device to maintain the two-dimensional detection device aligned with an imaging axis passing through the center of the radiation source changed by the movement of the first sub-arm.

A radiation imaging apparatus comprising:

• a C-arm;
• a radiation source configured to irradiate a subject with radiation;
• and
• a two-dimensional detection device configured to detect the radiation having passed through the subject,
• wherein the radiation source and the two-dimensional detection device are respectively arranged on opposite ends of the C-arm so as to face each other such that an imaging axis passing through the ends of the C-arm links the focal point of the radiation source and the center of the two-dimensional detection device, and
• wherein at least one of the radiation source and the two-dimensional detection device is attached to the C-arm via a sub-arm that is rotatably connected to a frame of the C-arm at a predetermined distance from an end portion of the frame.