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US 9,173,619 B2Granted
X-ray CT apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorsSatoshi Oota, Sakae Kimishima
Life of this patent
Estimating the term…
Abstract
There is provided an X-ray CT apparatus including: an X-ray source; a wedge which is disposed between the X-ray source and a subject and in which a shield blocking a part of an X ray is formed; a wedge driving unit for moving position of the wedge; and a system control unit controlling the wedge driving unit during a scan execution period to control the position of the wedge.
Claims13
An X-ray CT apparatus, comprising:
- an X-ray source;
- a wedge which is disposed between the X-ray source and a subject and in which a shield blocking a part of an X ray is formed;
- a wedge driving unit configured to move a position of the wedge in a slice thickness direction;
- and
- a system control unit configured to control the wedge driving unit during a scan execution period to control the position of the wedge, wherein the system control unit is configured to
- one of (1) control the wedge to a first position where first X-rays, which spread in a slice thickness direction of the X-ray source, unnecessary for reconstruction of an image for medical use are blocked in a non-reconstruction range at a start of the scan execution period, and (2) control the wedge to move to a second position where second X-rays unnecessary for reconstruction of the image for medical use are blocked in a non-reconstruction range at an end of the scan, and
- control the wedge to move to a third position so as not to block third X-rays in a reconstruction range of the image for medical use.
4 more elements
An X-ray CT apparatus, comprising:
- an X-ray source;
- a wedge which is disposed between the X-ray source and a subject and in which a shield blocking a part of an X ray is formed;
- a wedge driving unit configured to move a position of the wedge in a slice thickness direction;
- and
- a system control unit configured to control the wedge driving unit during a scan execution period to control the position of the wedge, wherein the system control unit is configured to
- one of (1) control the wedge to a first position where first X-rays, which spread in a slice thickness direction of the X-ray source, unnecessary for reconstruction of an image for medical use are blocked in a non-reconstruction range at a start of the scan execution period, and (2) control the wedge to move to a second position where second X-rays unnecessary for reconstruction of the image for medical use are blocked in a non-reconstruction range at an end of the scan, and
- control the wedge to move to a wedge center position so as not to block third X-rays in a reconstruction range of the image for medical use.
4 more elements
Dependencies are inferred from the claim text.