Check patentability & draft patents in minutes with Patsnap Eureka AI!

Radiation imaging device and image processing method

A photographing device and radiation technology, applied in the field of radiation photographing

Inactive Publication Date: 2016-08-31
HITACHI LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the device becomes a large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radiation imaging device and image processing method
  • Radiation imaging device and image processing method
  • Radiation imaging device and image processing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0027] Hereinafter, a first embodiment to which the present invention is applied will be described using the drawings. In addition, in the whole drawing for explaining each embodiment, the structure to which the same name and the same code|symbol are attached|subjected has the same function, and the repeated description is abbreviate|omitted.

[0028] figure 1 (a)-(c) are schematic views of the X-ray imaging apparatuses 110, 120, and 130 according to this embodiment. The X-ray imaging devices 110, 120, and 130 of this embodiment include: an X-ray tube 100 having an X-ray source 101 for irradiating an X-ray to an object 104, a detector 102 for detecting X-rays, a control device 103, an arm 108, and mobile device 109 . 105 in the figure is a bed on which the subject 104 is placed. An X-ray source 101 and a detector 102 inside the X-ray tube 100 are connected to a moving device 109 via an arm 108 . The control device 103 sends instructions to the moving device 109 to move the...

no. 2 approach ＞

[0087] Next, a second embodiment to which the present invention is applied will be described. In the present embodiment, the weight applied to each rotated measurement image is optimized.

[0088] The X-ray imaging device of this embodiment is the same as that of the first embodiment. That is, one can also use the above figure 1 Any one of (a) to (c). In addition, the functions of each part are basically the same. However, in this embodiment, in order to optimize the weights, the processing of the weight determination unit 322 is different. Hereinafter, this embodiment will mainly describe configurations different from those of the first embodiment.

[0089] Similar to the first embodiment, the weight determination unit 322 of this embodiment determines at least one of the weight value, the size of the smoothing region, and the shape of the reconstruction filter as the weight applied to each measurement angle of each rotated measurement image. At this time, weights are co...

no. 3 approach ＞

[0117] Next, a third embodiment to which the present invention is applied will be described. In the present embodiment, measurement is repeatedly performed in a predetermined rotation angle range (unit rotation angle range) smaller than 180 degrees. Within the range of each unit rotation angle, measurement images are continuously obtained according to each predetermined measurement angle. That is, in the present embodiment, measurements corresponding to different rotation angle ranges are performed multiple times to obtain one reconstructed image. In this embodiment, an image is reconstructed for each unit rotation angle range. In addition, weights are determined for each unit rotation angle range by the same method as in the first embodiment. In addition, the unit rotation angle ranges for acquiring the measurement images may not be continuous.

[0118] The X-ray imaging device of this embodiment is basically the same as that of the first embodiment. However, the measurem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a radiographic imaging device and an image processing method that can obtain the same image as an X-ray CT device that can obtain a measurement image at a rotation angle of 180 degrees or more regardless of the arrangement, moving track, and moving range of the X-ray source and detector. High-resolution images. The measurement image detected by the detector is converted into a rotation measurement image obtained by rotating and moving the X-ray source and the detector on concentric circular orbits. Then, according to the measurement angle of each rotated measurement image, the weight for giving the same intensity change as the reconstructed image obtained from the rotated measurement image obtained in the measurement of the rotation angle range of 180 degrees is applied, and the reconstruction operation is performed to obtain Refactor like.

Description

technical field [0001] The present invention relates to radiographic techniques, and in particular, to a technique for reconstructing a desired tomographic image from measurement images obtained by imaging an object from a plurality of different directions. Background technique [0002] There is an X-ray CT apparatus that arranges an X-ray source and a two-dimensional X-ray detector to face each other, and performs X-ray imaging while rotating a pair of the X-ray source and detector around a subject. In an X-ray CT apparatus, a series of measurement images acquired by a detector are subjected to reconstruction calculation processing to obtain reconstructed images, thereby obtaining a desired cross-sectional image. In an X-ray CT apparatus, in order to obtain a highly accurate reconstructed image, a measurement image obtained by rotating the X-ray source by 180 degrees or more is required. Therefore, the device becomes a large-scale device. [0003] Compared with X-ray CT d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03A61B6/02A61B6/51
CPCA61B6/5205G06T11/006A61B6/027A61B6/032A61B6/4441A61B6/50A61B6/5258A61B6/51A61B6/5211G06T11/005G06T2207/10081G06T2207/10116
Inventor 马场理香
Owner HITACHI LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com