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Imaging device

A camera device and image technology, applied in measuring devices, photography, image communication, etc., to achieve the effect of improving responsiveness and reducing changes

Inactive Publication Date: 2009-09-30
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the subject is a patient, when X-ray irradiation is performed in accordance with the breathing timing of the patient, it may be difficult to perform X-ray irradiation matching the breathing timing.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0072] Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. figure 1 is a block diagram of the X-ray imaging device of each embodiment, figure 2 is an equivalent circuit of a flat-panel X-ray detector viewed from the side for an X-ray imaging device, image 3 It is an equivalent circuit of a flat-panel X-ray detector viewed from above. In this Embodiment 1, also in Embodiments 2 to 4 mentioned later, a flat-panel X-ray detector (hereinafter, appropriately referred to as "FPD") is used as an example as a light or radiation detector, and as a The imaging device will be described by taking an X-ray imaging device as an example. In addition, the X-ray imaging device and FPD of each embodiment, and Figure 1~3 constitute the same.

[0073] The X-ray imaging device in Embodiment 1 also includes the X-ray imaging devices in Embodiments 2 to 4 mentioned later, such as figure 1 As shown, an X-ray tube 2 for irradiating X-rays to a...

Embodiment 2

[0117] Next, Embodiment 2 of the present invention will be described with reference to the drawings. Figure 8 It is a timing diagram of each frame rate and each signal related to it in Embodiment 2. The X-ray imaging device and the FPD of the second embodiment have the same configuration as that of the first embodiment, so the description thereof will be omitted, and only the points of difference will be described.

[0118] The difference with embodiment 1 is: controller 10 (referring to figure 1 ) has a region change function capable of changing the region where the readout of carriers at the time of irradiation is started. In addition, the readout of carriers during irradiation is performed periodically in the order from the first region to the adjacent divided regions, and the last region ( Figure 8 D4 in ) Once finished, return to the original area ( Figure 8 Be D1 in the middle), carry out repeatedly, be identical with embodiment 1 at this point. In addition, in t...

Embodiment 3

[0130] Next, Embodiment 3 of the present invention will be described with reference to the drawings. Figure 10 It is a timing chart of each frame rate and each signal related thereto in the third embodiment. The X-ray imaging device and FPD of the third embodiment are also configured in the same manner as those of the above-mentioned first and second embodiments, so description thereof will be omitted, and only differences will be described.

[0131] The difference from Examples 1 and 2 is that the readout of carriers during irradiation is performed continuously over the entire area of ​​the image. In addition, in the order of the adjacent regions to be divided ( Figure 10 In the order of D1, D2, D3, D4) the readout of carriers before irradiation is performed periodically, and the last area ( Figure 10 Once the readout of carriers in D4) ends, it returns to the original area ( Figure 10 D1) is repeated, and it is the same as in Examples 1 and 2 at this point.

[0132] ...

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PUM

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Abstract

The present invention discloses an imaging device, wherein an image is divided into four identical regions and carrier read before irradiation is set / divided according to images of the divided regions. As compared to the conventional image read, i.e., a carrier read-out of the entire region (frame), it is possible to each accumulation / read-out time by one over the number of divisions. The timing as a starting point of wait for irradiation is continued until the carrier read-out before the irradiation. Accordingly, even if the timing as the starting point of wait for irradiation fluctuates, the fluctuation is only within each accumulation / read-out set to a short value. Thus, it is possible to reduce the fluctuation of the wait time for irradiation and improve response as compared to the conventional technique.

Description

technical field [0001] The present invention relates to imaging devices used in medical fields, industrial fields, atomic energy fields, and the like. Background technique [0002] An imaging device that performs imaging based on detected light or radiation includes a light or radiation detector that detects light or radiation. An X-ray detector is used as an example for description. The X-ray detector has an X-ray sensitive X-ray conversion layer (semiconductor layer), converts the X-ray conversion layer into carriers (charge information) according to incident X-rays, and detects by reading the converted carriers X-rays. As the X-ray conversion layer, for example, an amorphous amorphous selenium (a-Se) film can be used (see, for example, Non-Patent Document 1). [0003] When a subject is irradiated with X-rays for radiographic imaging, a radiographic image transmitted through the subject is projected on an amorphous selenium film, and carriers in proportion to the densit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B42/02A61B6/00G01T1/00H01L31/09H04N5/335H04N5/369
CPCA61B6/4233H01L27/14676H04N5/32G03B42/02H04N25/30
Inventor 田边晃一
Owner SHIMADZU SEISAKUSHO CO LTD
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