When an irradiation range control member is reflected in a region of interest, a control unit of an X-ray fluoroscope is configured to perform at least one of a first control to update a region of interest to a new region of interest by excluding a portion where the irradiation range control member is reflected in the region of interest and a second control to assign a predetermined pixel value to a pixel of a portion where the irradiation range control member is reflected in the region of interest.

Provided is a flat panel detection system which is capable of appropriately shortening the time from irradiation with radiation for long length imaging to the display of a stitched image as well as the time taken for photography. Provided is a flat panel detection system 50, comprising: flat panel detectors P1-P3 which respectively read out, from a plurality of radiation detection elements 7, signal values D based on dosages of irradiated radiation; a display unit Ca; and an image generating unit C, 22 which generates a stitched image p. Before generating the stitched image p for output, the image generating unit C, 22 generates stitched images for verification ppre_raw, ppre_cor, by substituting an abbreviated process for any of the processes of a) generating radiological images p1-p3, b) image processing upon the radiological images p1-p3, or c) generating the stitched image p for output, and carrying out said process, and causes the display unit Ca to display the generated stitched images for verification ppre_raw, ppre_cor.

A radiation image capturing apparatus is provided. The apparatus comprises an image capturing unit configured to acquire a radiation image, the image capturing unit being provided with a plurality of receptor fields for acquiring irradiation information of radiation concerning an integrated dose of radiation entering during irradiation with radiation, and a selection unit configured to select a receptor field, of the plurality of receptor fields, which is used by a user. The selection unit changes an upper limit of the number of receptor fields, of the plurality of receptor fields, which are used for one image capturing operation depending on when the radiation image capturing apparatus is attached to a stand to which the radiation image capturing apparatus can be attached and when the radiation image capturing apparatus is detached from the stand.

A radiation image capturing apparatus is provided. The apparatus comprises an image capturing unit configured to acquire a radiation image, the image capturing unit being provided with a plurality of receptor fields for acquiring irradiation information of radiation concerning an integrated dose of radiation entering during irradiation with radiation, and a selection unit configured to select a receptor field, of the plurality of receptor fields, which is used by a user. The selection unit changes an upper limit of the number of receptor fields, of the plurality of receptor fields, which are used for one image capturing operation depending on when the radiation image capturing apparatus is attached to a stand to which the radiation image capturing apparatus can be attached and when the radiation image capturing apparatus is detached from the stand.

A low-dose CT imaging system and method that operates according to a pulsed X-ray emission scheme according to a predefined sequence of rotation angles of the X-ray source, along with image reconstruction algorithms to achieve high spatial and temporal resolution for CT scans. The systems and methods involve high speed switching (on the order of milliseconds) to generate pulsed exposure of X-ray radiation to the patient, reducing radiation dose by 4-8 fold, or more.

A low-dose CT imaging system and method that operates according to a pulsed X-ray emission scheme according to a predefined sequence of rotation angles of the X-ray source, along with image reconstruction algorithms to achieve high spatial and temporal resolution for CT scans. The systems and methods involve high speed switching (on the order of milliseconds) to generate pulsed exposure of X-ray radiation to the patient, reducing radiation dose by 4-8 fold, or more.

A radiographic system comprises: an irradiation control apparatus including a first timer configured to provide a time value for an irradiation timing; and a radiographic apparatus that is communicably connected to the irradiation control apparatus and includes a second timer configured to provide a time value for an imaging timing. The system measures a time difference between a time value of the first timer and a time value of the second timer; corrects at least one timer out of the first timer and the second timer so as to eliminate the time difference using one of a plurality of types of correction processing having different correction periods. The correction processing to be used is selected from the plurality of types of correction processing, based on an operating state of the radiographic apparatus.

A system can have an x-ray source that generates a series of individual x-ray pulses for multi-energy imaging. A first x-ray pulse can have a first energy level and a subsequent second x-ray pulse in the series can have a second energy level different from the first energy level. An x-ray imager can receive the x-rays from the x-ray source and can detect the received x-rays for image generation. A generator interface box (GIB) controls the x-ray source to provide the series of individual x-ray pulses and synchronizes detection by the x-ray imager with generation of the individual x-ray pulses. The GIB can control x-ray pulse generation and synchronization to optimize image generation while minimizing unnecessary x-ray irradiation.

A system can have an x-ray source that generates a series of individual x-ray pulses for multi-energy imaging. A first x-ray pulse can have a first energy level and a subsequent second x-ray pulse in the series can have a second energy level different from the first energy level. An x-ray imager can receive the x-rays from the x-ray source and can detect the received x-rays for image generation. A generator interface box (GIB) controls the x-ray source to provide the series of individual x-ray pulses and synchronizes detection by the x-ray imager with generation of the individual x-ray pulses. The GIB can control x-ray pulse generation and synchronization to optimize image generation while minimizing unnecessary x-ray irradiation.

Provided is a radiation imaging apparatus configured to image an imaging target object through use of a radiation generated by a radiation generator arranged to generate the radiation. The radiation imaging apparatus includes a spectrum calculating unit configured to calculate a spectrum of the radiation based on a transient response characteristic of the radiation generator.