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X-ray computed tomographic apparatus

By using an asymmetric multi-channel detector and a display unit in an X-ray computed tomography device to display a fan-shaped pattern of the X-ray irradiation area, the problem of poor operability in setting the scanning image photography angle is solved and more intuitive and convenient operations are achieved. , ensuring image integrity.

Inactive Publication Date: 2007-02-28
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since the side where the image is partially missing changes up, down, left, and right according to the position of the X-ray tube, it is difficult to know intuitively, and the operability deteriorates.

Method used

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In order to reconstruct the tomographic image data of one slice (slice) by an X-ray computed tomography apparatus, projection data of about 360° around the subject are required, and even in the half scan method, 180° are required. The projection data of °+view angle. The present invention can be applied to arbitrary reconfiguration methods. Here, the half-scan method is taken as an example for description. In addition, the mainstream of the mechanism for converting incident X-rays into charges is the indirect conversion type in which X-rays are converted into light by phosphors such as scintillators, and then converted into charges by photoelectric conversion elements such as photodiodes; Rays generate electron-hole pairs in the semiconductor and move to its electrodes, that is, the direct conversion type using the photoconductive phenomenon. Any of these types can be ...

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Abstract

An X-ray computed tomographic apparatus includes an X-ray tube that generates X-ray, an X-ray detector that detects an X-ray passing through an object, a supporting member that rotatably supports the X-ray tube and the X-ray detector around a rotational axis, a reconstructing unit that reconstructs an image on the basis of an output of the X-ray detector, an information creating unit that creates information concerning an arrangement of an asymmetrical field of view of the object when the field of view of the scanogram by the X-ray tube and the X-ray detector is asymmetric with respect to an imaging center line in a direction perpendicular to the rotational axis, and a display unit that displays information concerning the created arrangement.

Description

technical field [0001] The present invention relates to an X-ray computed tomography apparatus having an asymmetric X-ray detector. Background technique [0002] The asymmetrical X-ray detector is that the detection area of ​​the X-rays that have passed through the object is asymmetrical across the center line of photography in the direction of the channel. In other words, the X-ray on one side sandwiching the center line of photography An X-ray detector having a greater number of radiation detection channels than that of the other X-ray detection channel. Furthermore, it can also be said that the center of the multi-channel type X-ray detector is shifted to one side in the channel direction with respect to the line (imaging center line) connecting the X-ray focal point and the center of rotation of the tube. X-ray detectors. [0003] Corresponding to the asymmetry of the detector, the X-ray beam is also split into an asymmetric fan shape. The asymmetric X-ray detector ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03G01N23/00
CPCA61B6/467A61B6/463A61B6/587G01N23/046A61B6/032A61B6/465G01N2223/419
Owner TOSHIBA MEDICAL SYST CORP