X-ray diagnostic apparatus and radiation diagnostic apparatus
AssigneeKabushiki Kaisha Toshiba
InventorSeiichiro Nagai
Life of this patent
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Abstract
An X-ray diagnostic apparatus forms image data using an arbitrary region in the detectable area of a planar detector having a plurality of X-ray detector elements arrayed in a matrix. An X-ray sensor array for exposure-controlling having a plurality of X-ray sensors arrayed in a matrix overlaps the planar detector. An X-ray controller controls an X-ray tube unit on the basis of an output from the X-ray sensor array in order to optimize the X-ray dose on a subject. A controller selects at least one X-ray sensor in accordance with the position of a partial region where an image is formed. The controller controls at least one of the X-ray sensor array and X-ray controller so as to control the X-ray dose on the basis of an output from the selected X-ray sensor.
Claims22
An X-ray diagnostic apparatus comprising:
- an X-ray tube unit for irradiating a subject with X-rays;
- a planar detector which is opposite to said X-ray tube unit via the subject, said planar detector having a plurality of X-ray detector elements arrayed in a matrix;
- an X-ray sensor array for exposure-controlling which overlaps said planar detector, said X-ray sensor array having a plurality of X-ray sensors arrayed in a matrix;
- a processor for forming image data on the basis of an output from said X-ray detector element;
- an X-ray controller for controlling an X-ray dose on the basis of an output from said X-ray sensor array;
- and
- a controller for controlling said processor so as to make the formed image data correspond to a desired partial region in a detectable area of said planar detector, said controller selecting at least one X-ray sensor among said plurality of X-ray sensors on the basis of a position of the partial region.
An X-ray diagnostic apparatus comprising:
- an X-ray tube unit for irradiating a subject with X-rays;
- a planar detector which is opposite to said X-ray tube unit via the subject, said planar detector having a plurality of X-ray detector elements arrayed in a matrix;
- a movement mechanism for changing relative positions of said X-ray tube unit and planar detector;
- a processor for forming image data on the basis of an output from said X-ray detector element;
- and
- a controller for controlling said processor so as to make the formed image data correspond to a desired partial region in a detectable area of said planar detector, said controller controlling said movement mechanism in order to change the relative positions of said X-ray tube unit and planar detector in accordance with a position of the partial region.
An X-ray diagnostic apparatus comprising:
- an X-ray tube unit for irradiating a subject with X-rays;
- a planar detector which is opposite to said X-ray tube unit via the subject, said planar detector having a plurality of X-ray detector elements arrayed in a matrix;
- an X-ray sensor array which overlaps said planar detector, said X-ray sensor array having a plurality of X-ray sensors arrayed in a matrix;
- a movement mechanism for changing relative positions of said X-ray tube unit and planar detector;
- a processor for forming image data on the basis of an output from said X-ray detector element;
- an X-ray controller for controlling an X-ray dose on the basis of an output from said X-ray sensor array;
- and
- a controller for controlling said processor so as to make the formed image data correspond to a desired partial region in a detectable area of said planar detector, said controller selecting at least one X-ray sensor corresponding to a position of the partial region, and said controller controlling said movement mechanism in order to change the relative positions of said X-ray tube unit and planar detector in accordance with the position of the partial region.
A radiation diagnostic apparatus comprising:
- a radiation tube unit for irradiating a subject with radiation;
- a planar detector which is opposite to said radiation tube unit via the subject, said planar detector having a plurality of radiation detector elements arrayed in a matrix;
- a radiation sensor array for exposure-controlling which overlaps said planar detector, said radiation sensor array having a plurality of radiation sensors arrayed in a matrix;
- a movement mechanism for changing relative positions of said radiation tube unit and planar detector;
- a processor for forming image data on the basis of an output from said radiation detector element;
- a radiation controller for controlling a radiation dose on the basis of an output from said radiation sensor array;
- and
- a controller for controlling said processor so as to make the formed image data correspond to a desired partial region in a detectable area of said planar detector, said controller selecting at least one radiation sensor corresponding to a position of the partial region, and said controller controlling said movement mechanism in order to change the relative positions of said radiation tube unit and planar detector in accordance with the position of the partial region.
Dependencies are inferred from the claim text.