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X-ray CT system and control method for same

An X-ray and irradiation field technology, applied in the field of X-ray CT devices, can solve complicated problems

Active Publication Date: 2011-06-22
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, even in these methods, the wider the width of the detector in the body axis direction due to multi-columnization or the like, the wider the range in which X-rays are irradiated in one rotation, resulting in different structures of the subject at the same time. It is difficult to suppress the exposure of X-rays only to the parts to be avoided due to the scanning of parts
[0011] In addition, in the prior art, in order to irradiate an area to be avoided with X-ray irradiation with a small amount of X-ray irradiation, it is necessary to manually set the irradiation field and the number of detection element columns for the entire range of the region of interest, so complicated

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  • X-ray CT system and control method for same

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no. 1 Embodiment approach

[0023] Hereinafter, the X-ray CT apparatus related to the first embodiment will be described. figure 1 It is a block diagram showing the functions of the X-ray CT apparatus according to this embodiment. But when figure 1 The part indicated by the dashed-dotted line is not included in the present embodiment, but will be described in the second embodiment.

[0024] Hereinafter, first, the main configuration for imaging by the X-ray CT apparatus will be described. Next, the effects of the irradiation field, X-ray exposure dose (also referred to as X-ray dose), and Each value of the used detector row and the like is calculated, and the calculated irradiation field, X-ray irradiation amount, and used detector row are used for imaging of an X-ray CT image. Hereinafter, an imaging region where an X-ray CT image of a subject is to be imaged is referred to as a region of interest (also referred to as ROI). In addition, the X-ray CT apparatus according to the present embodiment has ...

no. 2 Embodiment approach

[0096] Hereinafter, the X-ray CT apparatus related to the second embodiment will be described. The X-ray CT apparatus according to the present embodiment has a configuration in which an irradiation area is obtained in accordance with a change in the X-ray irradiation dose (X-ray irradiation dose) required for each part of the subject based on scout images, and this configuration is similar to the first 1 The implementation is different. Therefore, in the following description, the method of obtaining the irradiation area will be mainly described. A block diagram showing the functions of the X-ray CT apparatus related to this embodiment is also used figure 1 to express. In the following description, unless otherwise specified, functional parts having the same reference numerals as those in the first embodiment have the same functions.

[0097] The X-ray CT apparatus related to this embodiment has been added with the figure 1 The structure of the radiation dose calculation u...

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Abstract

An X-ray CT system of an embodiment includes the following. An imaging region data acquisition part is configured to acquire a first imaging region and a second imaging region that have different widths from each other in the body axial direction based on a scanogram as imaging regions for performing scan imaging. An irradiation field control part is configured to obtain irradiation fields for the first and the second imaging regions, and control an irradiation field regulating part corresponding to the relative positions by a moving part so as to realize the irradiation fields obtained for each the imaging region. An X-ray control part is configured to control an X-ray generating part corresponding to the relative positions by the moving part so as to irradiate X-rays to the first and the second imaging regions for the scan imaging.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority from prior Japanese Patent Application No. 2009-286444 filed on December 17, 2009, the entire contents of which are hereby incorporated by reference. technical field [0003] Embodiments of the present invention relate to an X-ray CT system (X-ray CT system) equipped with a multi-row detector (two-dimensional detector). More specifically, it relates to an X-ray CT apparatus having a structure for reducing an exposure dose of a subject and a control method thereof. Background technique [0004] An X-ray CT apparatus is a device that irradiates a subject with an X-ray beam that is rotated, and forms a tomographic image or the like based on information obtained by detecting the X-rays transmitted through the subject. In recent years, devices including two-dimensional detectors have been proposed as such X-ray CT devices. The so-called two-dimensional detector is a device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/469A61B6/032A61B6/488A61B6/4085A61B6/544
Inventor 新野俊之
Owner TOSHIBA MEDICAL SYST CORP