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X-ray dragnosis apparatus

A diagnostic device and a technology of a judging device, which are applied in the direction of diagnosis, radiological diagnostic equipment, computerized tomography scanner, etc., and can solve the problems of diagnostic image line noise, mixed noise, image data offset, etc.

Inactive Publication Date: 2004-09-29
HITACHI MEDICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, even in pixels placed in dark areas, noise may be mixed in
In this case, even if no noise is mixed in the effective area, the compensation data is generated based on the noise mixed in the dark area, so that the image data of one line is shifted from the adjacent line, and the diagnosis image problem with row noise

Method used

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Embodiment approach 1

[0022] figure 2 It is a diagram for explaining the schematic configuration of the X-ray diagnostic apparatus according to Embodiment 1 of the present invention, especially for explaining a noise removal unit that removes noise contained in image data detected by a semiconductor two-dimensional X-ray detector (FP). 8 is a diagram of the brief structure. Furthermore, in the X-ray diagnostic apparatus according to Embodiment 1, in addition to figure 1 Except for the noise removal unit 8 shown, the other configurations are well-known configurations, so in the following description, the noise removal unit 8 will be described in detail. However, in the following description, when the subtraction unit 104, the addition unit 106, the determination unit 107, and the calculation unit 108 are realized by a program operating on a well-known information processing device constituting the X-ray diagnostic apparatus according to Embodiment 1, , but can also be implemented in dedicated har...

Embodiment approach 2

[0034] 3 is a diagram illustrating a schematic configuration of an X-ray diagnostic apparatus according to Embodiment 2 of the present invention, particularly a diagram illustrating a schematic configuration of a noise removal unit 8 that removes noise contained in image data detected by the FP. However, in the X-ray diagnostic apparatus of Embodiment 2, except for the selection means 201, the third line memory 202, and the determination means 203, the rest of the configuration is the same as that of the noise removal unit 8 of Embodiment 1, so the following description In the following, the selection means 201, the third line memory 202, and the determination means 203 will be described in detail. In addition, the selection means 201 and the determination means 203, as in the first embodiment, have been described for the case where they are realized by a program operated in a well-known information processing device constituting the X-ray diagnostic apparatus of the second emb...

Embodiment approach 3

[0040] Figure 4 It is a diagram for explaining the schematic configuration of the X-ray diagnostic apparatus according to Embodiment 3 of the present invention, especially a diagram for explaining the schematic configuration of the noise removal unit 8 that removes noise contained in image data detected by the FP. However, in the X-ray diagnostic apparatus according to the third embodiment, the configuration other than the frame memory 301 is the same as that of the noise removing unit 8 according to the second embodiment, so in the following description, the frame memory 301 will be described in detail. . Furthermore, the frame memory 301 can be realized by an external memory included in a well-known information processing device constituting the X-ray diagnostic apparatus of the third embodiment, as in the first embodiment.

[0041] The frame memory 301 operates as a storage device for storing image data of a frame immediately preceding the image data of a line input by a ...

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Abstract

An X-ray diagnosis apparatus comprises an X-ray tube for projecting X-rays onto a subject, a two-dimensional X-ray detector for detecting X-ray signals from the subject, an image processing means for generating image signals to perform image display of the X-ray signal from the two-dimensional X-ray detector, and an image displaying means for displaying the image signal, and further comprises a noise eliminating means for generating noise correction signals from the X-ray signal of two scanning lines adjacent to each other out of a plurality of scanning lines of the two-dimensional X-ray detector and eliminating noise in an X-ray signal of the scan lines by using the noise correction signal.

Description

technical field [0001] The present invention relates to an X-ray diagnostic apparatus, and particularly relates to an effective technique for reducing row-correlated noise, which is a cause of image quality degradation of a semiconductor two-dimensional X-ray detector (flat panel detector: FP). Background technique [0002] In a conventional X-ray diagnostic apparatus, as shown in "X-ray image forming apparatus" of JP-A-2000-33083, in the detection area of ​​a semiconductor two-dimensional X-ray detector, first, a so-called dark Compensation data is calculated from the detector output of the region where the X-ray beam is not incident, and the region where the X-ray beam is incident (hereinafter referred to as "effective region") is generated using the compensation data calculated from the detector output of the dark region. The structure of the compensation data. [0003] However, even in pixels arranged in dark areas, noise may be mixed in. In this case, even if no noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00A61B6/02A61B6/03G06T1/00G06T5/00H04N1/409
CPCA61B6/4225A61B6/4441A61B6/032A61B6/585
Inventor 池田重之铃木克己
Owner HITACHI MEDICAL CORP