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CT device and image pickup method of CT device

A technology of photographing surface and rotating position, which is applied in the field of computerized tomography device (CT) and can solve the problems of increasing the number of views and long time of tomography

Active Publication Date: 2013-07-03
TOSHIBA IT & CONTROL SYSTEMS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In this way, in the conventional CT apparatus, in order to ensure the resolution in the direction perpendicular to the layer of the subject with a layered structure, it is necessary to increase the number of views, and there is a problem that the time for tomography is long.

Method used

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  • CT device and image pickup method of CT device
  • CT device and image pickup method of CT device
  • CT device and image pickup method of CT device

Examples

Experimental program
Comparison scheme
Effect test

Deformed example 1

[0080] In the first embodiment, the rotation angle range of the scan of 45° is set centering on the rotation position of the layer layer 12 parallel to the optical axis L, but the rotation angle range does not necessarily have to be 45°. The layered structure of the battery 90 is partially inclined from the layer 12 due to uneven winding or wrinkles. It is only necessary to obtain a transmission image from a direction within the inclination range, so the rotation angle range may be set so as to include the estimated inclination angle range α.

[0081] To be precise, the layer structure of the battery has a thickness within the field of view. Therefore, it is necessary to increase the rotation angle range by an angle β, which is from the rotation position where the X-rays and the upper layer of the thickness are transmitted in parallel to the X-rays and the thickness. The angle at which the bottom layer is parallel to the rotational position of the transmission. Therefore, as ...

Embodiment 2

[0083] In the first embodiment, the rotation angle range of the 45° scan is symmetrically set around the rotation position of the layer 12 of the layered structure parallel to the optical axis L (usually preferably symmetrical), but it may be inaccurately symmetrical. Just roughly symmetrical.

Deformed example 3

[0085] In the first embodiment, furthermore, within ±60° from the second rotational position (180°) which is 180° different from the (first) rotational position (0°) where the battery 90 is placed, the The continuous range of the two rotation positions is the second rotation angle range (below 120°), implement such a second scan: within the second rotation angle range, the stage 4 is rotated, and at the same time, each second rotation A plurality of transmission images detected at angular intervals are taken in and stored as second scan data, and at least one portion of the battery 90 parallel to the tomographic plane TP can also be reconstructed based on the initially performed (first) scan data and second scan data. A profile image.

[0086] Figure 5 This is an example of the scanning rotation angle range of Modification 3, and the second rotation angle range is a range of 45° around 180°. Reconstruction in this case may be performed by reconstructing the first scan data ...

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Abstract

The invention provides a CT device and an image pickup method of a CT device obtaining a section image of a checked body provided with a laminate construction with short tomography time. The CT device is provided with: a radioactive source (1) directed toward a checked body to radiate rays with the radioactive optical axis of a tomography surface as the center, the checked body is supported on anobjective table (4) in a mode that the laminated constructed layer surface to be photographed crosses with the tomography surface; a radioactive ray detector (3) checking radioactive rays penetratingthe objected body and outputting the radioactive rays as a transmission image; a rotating unit (7) making the objective table and the radioactive rays be in a relative rotation; a scanning control unit (9c) controlling the rotating unit (7) and the radioactive ray detector to perform such scanning; at the level surface of the objected body, a plurality of transmission images are preferably selected as scanning data for storage at the rotating angle close to parallel to the optical axis of the radioactive ray; and a rebuilding unit (9d) rebuilding at least one section image of the checked bodyparallel to the tomography surface.

Description

technical field [0001] The present invention relates to a computed tomography apparatus (hereinafter referred to as a CT (Computed Tomography, computer tomography) apparatus) for imaging a cross-sectional image of a subject. Background technique [0002] In recent years, the demand for secondary batteries such as lithium-ion batteries and nickel-metal hydride batteries has increased due to the development of mobile devices such as mobile phones and the practical use of electric vehicles. Accordingly, the importance of battery inspections for supplying safe and highly reliable batteries that do not cause short circuits or fires has increased. As this battery inspection, there is known a method of taking a cross-sectional image of a subject having a layered structure and inspecting it. [0003] first, Figure 7 A schematic diagram (sectional view) of a battery 90 as a subject is shown. This figure is a cross-sectional view schematically showing the structure of a lithium bat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03
CPCG01N23/046G01N2223/33G01N2223/419G06T11/005Y02E60/10
Inventor 藤井正司岩泽纯一宇山喜一郎吉田雅也山本辉夫
Owner TOSHIBA IT & CONTROL SYSTEMS CORP