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Shading correction device, method and program

A shadow correction and shadow technology, applied in image analysis, medical science, image enhancement, etc.

Inactive Publication Date: 2011-09-21
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the technology disclosed in the above-mentioned Patent Document 1, the shading correction data is corrected according to the incident angle of radiation, and therefore, it is impossible to obtain accurate shading correction when changing the rotational positional relationship between the radiation source and the FPD

Method used

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  • Shading correction device, method and program
  • Shading correction device, method and program
  • Shading correction device, method and program

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Experimental program
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Embodiment Construction

[0041] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 is a schematic diagram of a radiation imaging system to which the shading correction device according to the first embodiment of the present invention is applied. Such as figure 1 As shown, the radiation imaging system 1 according to the first embodiment of the present invention includes an imaging unit 10 and a console 30 .

[0042] The imaging unit 10 includes a radiation control unit 12, a radiation source 14, an imaging table 16A, a radiation detection unit 18A, a gantry 16B, and a radiation detection unit 18B, wherein the imaging table 16A is used to capture a radiation image of a subject H in a supine position, The gantry 16B is used to capture radiographic images of the subject H in an upright position.

[0043] The radiation control unit 12 drives the radiation source 14 to control the radiation level so that radiation having a specified intensity is ...

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PUM

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Abstract

A device and a method for allowing appropriate shading correction when a radiographic image of a subject is taken using a radiation detector are disclosed. A shading correction data obtaining unit (42) obtains, in advance, first shading correction data (H1) for shading attributed to a radiation source (14) and second shading correction data (H2A, H2B) for shading attributed to a FPD (22A, 22B) of a cassette (20A, 20B), and the obtained shading correction data are stored in a storage unit (38). During imaging using the cassette (20A) , for example, a detection unit (40) detects the orientation of the FPD (22A), and an image processing unit (34) rotates the first shading correction data (H1) relative to the second shading correction data (H2A, H2B) based on the detected orientation to generate final shading correction data (H0) . Then, shading correction is applied to radiographic image data obtained through imaging using the final shading correction data (H0).

Description

technical field [0001] The present invention relates to a shading correction device and a shading correction method for correcting shading appearing in a radiographic image when a radiographic image of an object is taken using a radiation detector, and a shading correction device for making a computer functioning program. Background technique [0002] Conventionally, various types of radiation detectors (so-called "flat panel detectors", hereinafter referred to as "FPDs") for recording radiographic images of a subject formed by radiation transmitted through the subject have been proposed. ”), and it has been practically applied to the medical field and the like. An example of such an FPD is an FPD using a semiconductor such as amorphous selenium, which generates charges when exposed to radiation. As this type of FPD, so-called optical readout systems and TFT readout systems have been proposed. In addition, various types of cassettes have been proposed that contain the FPD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCG06T2207/10116G06T5/008G06T5/001G06T5/94
Inventor 桑原健
Owner FUJIFILM CORP