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X-ray CT device

A technology of X-rays and radiation sources, applied in the field of multi-slice X-ray CT devices, which can solve problems such as insufficient data

Inactive Publication Date: 2004-07-28
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, part of the target internal organ is separated from the scan range, resulting in insufficient data and possible rescanning

Method used

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Embodiment Construction

[0027] Referring to the drawings, a first embodiment of the X-ray CT apparatus of the present invention will be described. There are many types of X-ray CT apparatuses, such as a rotary / rotary type in which an X-ray tube and an X-ray detector rotate around a patient as a unit, and a fixed / rotary type in which a plurality of detection elements are arranged in a ring and the X-ray tube rotates around a patient. Rotary type. The present invention can be applied to every type of X-ray CT apparatus. Hereinafter, a rotation / rotation type X-ray CT apparatus is explained as an example. Mechanisms for converting incident X-rays into charges are mainly classified into direct conversion types and indirect conversion types. In the direct conversion type, X-rays are converted into optical signals by a fluorescent substance such as a scintillator, and the optical signals are converted into charges. In the indirect conversion type, a photoconductive phenomenon is used in which pairs of el...

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Abstract

An X-ray CT apparatus, as one example, includes at least one X-ray irradiation source configured to irradiate an X-ray to a volume of interest, at least one X-ray detector including a plurality of detection element segments configured to detect the X-ray penetrated through the volume of interest, at least one collimator configured to create an opening that is movable in at least one of a slice direction and a channel direction, at least one image processing part configured to extract a portion of the volume data, a controller configured to set the opening of the at least one collimator to a second opening size according to a cylinder-like second scanning range that is set to limit the volume of interest and configured to perform a second scan, and at least one reconstruction part configured to reconstruct image data based on data collected by the second scan.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims the benefit of priority from prior Japanese Patent Application No. 2002-347795 filed on November 29, 2002, the entire contents of which are incorporated herein by reference. technical field [0003] The invention relates to a multi-slice X-ray CT device. Background technique [0004] An X-ray CT apparatus is known that irradiates a patient with X-rays, and reconstructs image data from the transmission data. Using a multi-slice X-ray CT apparatus, it is possible to simultaneously collect two or Multiple slices of data. By using multi-slice scanning (also called cone beam scanning) together with helical scanning, data of a large scanning range can be collected in a short time, and multi-slice X-ray CT apparatuses become popular. [0005] Using multi-slice scanning with helical scanning, one of the important topics is X-ray dose reduction. For example, Japanese Patent Publicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03A61B6/06
CPCA61B6/466A61B6/488A61B6/4085A61B6/06A61B6/503A61B6/027A61B6/032
Inventor 奥村美和东木裕介太田高正
Owner KK TOSHIBA
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