Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Image processing apparatus, x-ray image capturing apparatus and image processing method

An image processing device and image technology, which are applied in image data processing, image enhancement, image analysis and other directions, can solve the problems of different contrast and cannot be confirmed, and achieve the effect of suppressing uneven contrast and improving diagnostic efficiency.

Inactive Publication Date: 2012-05-09
HITACHI LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the contrast between images is different, a certain bone part may be clearly recognized in one image but not in other images.

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
  • Image processing apparatus, x-ray image capturing apparatus and image processing method
  • Image processing apparatus, x-ray image capturing apparatus and image processing method
  • Image processing apparatus, x-ray image capturing apparatus and image processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] One embodiment of the above invention will be described below with reference to the drawings.

[0025] figure 1 The X-ray imaging apparatus 100 of the present embodiment shown is, for example, an apparatus used for diagnosis in a hospital, etc., and has an X-ray tube 1 (image imaging unit) for X-ray irradiation, and a two-dimensional X-ray imaging unit for transmission X-ray image detection. An X-ray detector 4 such as a flat panel type of the X-ray detector. The X-ray tube 1 and the detector 4 are configured to be movable in the body axis direction Z of the subject M in synchronization with each other. In a state where the subject M is stationary, imaging is repeated while moving the X-ray tube 1 and the detector 4 in the direction Z of the body axis of the subject M, so that images along the body axis of the subject M can be obtained. Multiple X-ray images that are continuous and partially repeated.

[0026] The detector 4 (image taking unit) detects the transmitte...

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

This invention provides an image processing apparatus capable of suppressing the variation in density and contrast of a long-length image that is a joint image obtained by joining a plurality of X-ray images. An image processing apparatus (6) comprises: an image memory (62) for storing the data of a plurality of X-ray images (20, 21, 22) partially overlapping with one another; a density / contrast correcting unit (64) for evening up the densities and contrasts of the plurality of X-ray images; and a long-length image obtaining unit (65) for joining all of the X-ray images (20, 21', 22") as evened up in density and contrast by the density / contrast correcting unit (64), thereby obtaining a long-length X-ray image corresponding to a long-length image-captured area of an examined body (M). The density / contrast correcting unit (64) comprises: a first table creating unit (642) for obtaining, based on image information of the overlapping portions (20a, 21a, 21b, 22a) of two adjacent ones (20, 21; or 21, 22) of the plurality of X-ray images, a gray scale conversion table (AB, BC) with which the densities and contrasts of the two X-ray images (20, 21; or 21, 22) can be evened up; a second table creating unit (643) for obtaining, based on the gray scale conversion table (AB, BC), a second gray scale conversion table (BA, CB) with which the densities and contrasts of a reference X-ray image (20) and other remaining X-ray images (21, 22) selected from the plurality of X-ray images (20-22) can be evened up; and an evening unit (644) for evening up the densities and contrasts of the remaining X-ray images (21, 22) on basis of the second gray scale conversion table (BA, CB).

Description

technical field [0001] The invention relates to an image processing device, an X-ray photographing device and an image processing method. Background technique [0002] When acquiring a long-span image as a stitched image using a plurality of partially overlapping X-ray images, it is known that the display densities of the images before stitching are matched and then combined to acquire the long-span image. For example, in the technique disclosed in Patent Document 1, first, each image before joining is subjected to logarithmic transformation. Next, a histogram of each image is obtained from each logarithmically transformed image. Next, a shift in the position of the center of gravity of each of the acquired histograms is detected, and the shift is corrected. In addition, the offset-corrected images are combined to obtain a long-span image as a joined image. [0003] Patent Document 1: JP-A-2007-275228 Contents of the invention [0004] However, the conventional method ...

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
IPC IPC(8): A61B6/00
CPCG06T2207/10116A61B6/5241G06T5/50G06T5/009G06T5/92
Inventor 胜间田真弥铃木克己
Owner HITACHI LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products