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X-ray CT device

A technology of X-ray and irradiation devices, which is applied in measuring devices, instruments for radiological diagnosis, material analysis using radiation, etc. It can solve the problems that cannot be completely ruled out and the image quality is degraded.

Inactive Publication Date: 2004-05-19
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, based on the incidence of scattered rays of X-rays irradiated from the X-ray tube 11A on the X-ray detector 16A as figure 1 As explained, although it can be excluded by the action of the collimator 110, it cannot be completely excluded that the scattered rays based on the X-rays irradiated from the X-ray tubes 11B, 11C enter the X-ray detector 16A. For the other X-ray detectors 16B, 16C Also, this could be the reason for the loss of quality

Method used

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Embodiment Construction

[0019] Refer below Figure 3 ~ Figure 7 A first embodiment of the X-ray CT apparatus of the present invention will be described in detail. The X-ray CT apparatus of the first embodiment such as image 3 As shown, there are three X-ray tubes 1A, 1B, and 1C. The X-ray tubes 1A, 1B, and 1C are arranged at equal intervals on concentric circles sharing a center of rotation O. As shown in FIG. The angle β formed by the center lines Co passing through the respective X-ray tubes 1A, 1B, and 1C is approximately 120°. That is, if the X-ray tube 1A is at a position of 0°, the X-ray tube 1B is at a position of 120°, and the X-ray tube 1C is at a position of 240°. Slits 2A, 2B, and 2C are respectively provided at the X-ray irradiation port sides of X-ray tubes 1A, 1B, and 1C to form X-ray beams 3 of predetermined thickness, collimated and fan-shaped. The centerline Co is also the centerline of the X-ray beam 3 . The top plate 5 supporting the object 4 is arranged so that the object 4 ...

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Abstract

An X-ray CT apparatus includes a plurality of X-ray irradiation sources and a plurality of X-ray detection units. Timing of irradiation of X-ray is shifted by each X-ray irradiation source, the detection unit separately obtains projection data and scatter correction data. In a scatter correction unit, scatter correction is performed based on the projection data and the scatter correction data.

Description

technical field [0001] The present invention relates to an X-ray CT device, and relates to an X-ray CT device having a plurality of X-ray irradiation devices. Background technique [0002] The X-ray CT device detects the projected amount of X-rays irradiated from the X-ray tube through the subject (transmitted X-ray amount) by the X-ray detector, and collects the measured data as image (view) data by the data collection device , using a computer to perform image reconstruction on the collected projection data, so as to obtain a tomographic image of the object to be detected. Here, image data refers to a data unit used for image reconstruction. The third-generation X-ray CT apparatus places the subject in the middle, arranges the X-ray tube and the X-ray detector facing each other, rotates it around the subject in a range of 360°, and simultaneously transfers the X-ray tube to the X-ray detector. The collimated fan-shaped X-ray beam is irradiated to the subject, and the X-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03G01N23/04G06T11/00
CPCG06T11/005A61B6/032A61B6/5282G01N23/046A61B6/4014A61B6/027G01N2223/419G01N2223/612
Inventor 尾崎真浩
Owner TOSHIBA MEDICAL SYST CORP