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Radiographic apparatus and radiation detection signal processing method

A radiography and radiation detection technology, applied in X-ray equipment, radiation/particle processing, radiation measurement, etc., can solve problems such as damage to X-ray cross-sectional image quality, and achieve the effect of suppressing quality degradation

Inactive Publication Date: 2005-08-31
SHIMADZU SEISAKUSHO CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This noise causes problems that impair the quality of X-ray cross-sectional images

Method used

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  • Radiographic apparatus and radiation detection signal processing method
  • Radiographic apparatus and radiation detection signal processing method
  • Radiographic apparatus and radiation detection signal processing method

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Embodiment Construction

[0070] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0071] figure 2 A block diagram showing the overall structure of the X-ray camera apparatus according to the present invention.

[0072] Such as figure 2 As shown, the X-ray camera equipment includes: a top plate 1 for supporting a patient M to be radiographed; an X-ray tube 2 used as a radiation emitting device for emitting a cone X-ray beam to the patient M on the top plate 1; A flat-panel X-ray detector 3 (hereinafter referred to as FPD as appropriate) for a transmission X-ray image of the patient M, used as a plane radiation detection device facing the X-ray tube 2 across the patient M; and used as an imaging system scanning device The system scanner 4 is used to move the X-ray tube 2 on the linear track NA used as one of the two linear tracks NA and NB across the non-circular track of the patient M facing each other, and to move ...

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Abstract

In a radiographic apparatus according to this invention, when an imaging system scan is performed, a imaging system scanner moves an X-ray tube, which emits a cone-shaped X-ray beam, on one linear track, and an FPD, which detects transmission X-ray images of an object under inspection, on the other linear track synchronously with movement of the X-ray tube. Thus, a non-revolving type imaging system scan is carried out. When an X-ray sectional image reconstruction is performed, a sectional image reconstructing unit reconstructs X-ray sectional image from X-ray detection signals of transmission X-ray images of the object detected by the FPD at different radiographic angles. At this time, a time lag remover uses lag-free X-ray detection signals with lag-behind parts removed from the X-ray detection signals. As a result, the lag-behind parts included in the X-ray detection signals, which would cause a lowering of image quality, are removed in advance of a reconstruction of X-ray sectional images.

Description

Technical field [0001] The present invention relates to a radiation emitting device for emitting a cone beam, capable of moving on one of two non-circular orbits facing each other across a subject, and a device for detecting a transmission X-ray image of the subject The planar radiation image detection device can move in synchronization with the movement of the radiation emitting device on another track. The present invention relates to a non-revolving (non-revolving) type radiographic apparatus for reconstructing a radiographic image of an object based on radiation detection signals of transmitted radiographic images of an object detected from different radiographic angles by a moving radiographic image detection device Radiation cross-sectional view. More specifically, the present invention relates to a technique for suppressing degradation of radiation cross-sectional image quality caused by hysteresis included in a radiation detection signal. Background technique [0002] Tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/02A61B6/00A61B6/03G01N23/00G01T1/00G03B42/02G21K1/12H05G1/60
CPCA61B6/4441A61B6/032A61B6/587A61B6/03
Inventor 冈村升一
Owner SHIMADZU SEISAKUSHO CO LTD
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