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X-ray CT device, image processing device and image processing method

An image processing and X-ray technology, applied in the fields of radiological diagnostic equipment, medical science, diagnosis, etc., can solve problems such as interpretation barriers, printing failures, and changes in the amount of noise

Active Publication Date: 2021-07-06
HITACHI HEALTHCARE MFG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the invention described in Patent Document 1, volume data is generated from captured data, and images are generated by reslicing the volume data in order to match the number of images (number of frames) to be printed on one film. The slice thickness will vary depending on the number of frames you want to print, as will the amount of noise
Therefore, it is impossible to print an image with the desired quality (the amount of noise and the sharpness of the boundary) that the user desires, which may hinder the interpretation when trying to make a diagnosis from the image printed on the film.

Method used

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  • X-ray CT device, image processing device and image processing method
  • X-ray CT device, image processing device and image processing method
  • X-ray CT device, image processing device and image processing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0024] figure 1 It is a block diagram of the X-ray CT apparatus of 1st Embodiment. This X-ray CT apparatus is equipped with: scanning frame 101, and it is built-in X-ray tube 102 and X-ray detector 104; Workbench 103, it is arranged in the opening of scanning frame 101; gantry controller 106, which controls the gantry 101; workbench controller 107, which controls the workbench 103; The intensity is converted into an electrical signal; the reconstruction operator 111 receives the electrical signal converted by the DAS 108, and performs data modification and image reconstruction; the image processing device 109 stores the image made by the reconstruction operator 111, or displays the image to a connected display device (not shown), or to transmit data to the imager 110 for printing. The gantry 101 also has a rotating plate 112 on which the X-ray tube 102 and the X-ray detector 104 are mounted and rotated.

[0025] The table 103 carries the subject 113 and is arranged in the o...

no. 2 Embodiment approach ＞

[0051] The X-ray CT apparatus of the second embodiment will be described.

[0052] In the first embodiment is in Figure 4 The noise amount of the diagnostic image 140 is obtained by actual measurement in step 45 of the above-described step 45, but in the second embodiment, the noise amount of the diagnostic image 140 is estimated by calculation based on the scan image. Specifically, in Figure 4 In step 45, the typesetting image creation unit 121 obtains the features of the scan image at each position in the body axis direction of the scan image captured in step 44, and uses a known method (for example, the method described in Japanese Patent No. 5254252) Convert features to 3D water models. Then, the X-ray tube current, slice thickness, and reconstruction filter set in step 40 are applied to the water model to generate an image, and the standard deviation (SD) of the generated image is calculated as a noise amount. In step 46 , the layout image creation unit 121 uses the ...

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Abstract

The present invention provides an X-ray CT apparatus, an image processing apparatus, and an image processing method for generating a layout in which a layout image having a noise amount close to that of an image at the time of imaging is allocated in a desired layout. Here, the imaging control unit captures a plurality of tomographic images of the subject with a set slice thickness for imaging. The layout image creating unit divides the volume data obtained from the plurality of tomographic images by the layout slice thickness to generate a plurality of layout images, and generates a layout obtained by arranging the obtained multiple layout images. The layout image creation unit performs image processing on the images constituting the layout image so that the amount of noise included in the layout image is equal to the noise amount of the tomographic image captured by the imaging control unit.

Description

technical field [0001] The present invention relates to an X-ray CT apparatus, and more particularly to an X-ray CT apparatus that two-dimensionally arranges images of a plurality of slices of a subject to be printed on one film or displayed on one screen. Background technique [0002] As an output method of an image captured by an X-ray CT apparatus, in addition to a method of displaying an image on a monitor, there is also a method of printing on a medical film. In recent years, with the popularization of PACS (Picture Archiving and Communication Systems), the use of medical film for image storage has become less and less. However, in some areas of China or Southeast Asia, there are still hospitals that recommend filming An image of the test is printed on film and provided to the patient. Patients take the images printed on film to other hospitals for interpretation by doctors, or keep the printed images at home as proof of examination. Since an X-ray CT apparatus usuall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03
CPCA61B6/032A61B6/4411A61B6/5211A61B6/5258
Inventor 角村卓是
Owner HITACHI HEALTHCARE MFG LTD