[Problem] To ameliorate the deleterious effects of scattered radiation on contrast in radiographic images. [Solution] A frequency analyzer (42) performs a frequency analysis of a radiographic image, and generates band images expressing the frequency components in each frequency band. A reference image generator (43) generates a reference image expressing information associated with scattered radiation included in the radiographic image, and generates reference band images corresponding to the frequency bands from the reference image. A band image transformer (44) generates transformed band images by transforming the corresponding pixels of the reference band image and the band image in corresponding frequency bands. A synthesizer (46) generates a processed radiographic image in which the contrast has been transformed by synthesizing the transformed band images.

Radiographic image processing device, method, and program

A frequency resolution unit performs frequency resolution of a radiographic image to generate band images representing frequency components in a plurality of frequency bands. A reference image generation unit generates a reference image representing information associated with scattered radiation included in the radiographic image, and generates a plurality of band reference images corresponding to a plurality of frequency bands from the reference image. A band image conversion unit performs conversion between the corresponding pixels of the band reference images and the band images in the corresponding frequency bands to generate converted band images. A synthesis unit synthesizes the converted band images to generate a processed radiographic image with converted contrast.

Radiographic image processing device, method, and recording medium

PROBLEM TO BE SOLVED: To provide a radiation image processing device, method and program for suitably suppressing scattered radiation components of a non-shield image region by suppressing an estimation error of scattered radiation of the non-shield image region in a subject image having a shied image region radiographed by shielding radiation by a shield in an irradiation direction of the radiation and the non-shield image region.SOLUTION: There is provided a radiation image processing device in which: a subject image Ik is acquired; region information for identifying a non-shield image region RA and a shield image region RB of the subject image Ik is acquired; the spread of scattered radiation occurring in a subject part where radiation transmits in an irradiation direction of the radiation is estimated on the basis of a photographing condition and the region information of the subject image Ik; a scattered radiation component of each position of the non-shield image region RA is calculated by estimating that no scattered radiation which spreads from the subject part where a shield shields radiation in an irradiation direction of the radiation to the non-shield image region RA; and the scattered radiation component of each position of the non-shield image region RA is suppressed in accordance with the calculated scattered radiation component.SELECTED DRAWING: Figure 3

Radiation image processing device, method and program

In an image analysis device, an image analysis method, and a non-transitory computer-readable recording medium, it is determined whether a radiographic image is captured by rocking a rocking imaging grid. The image analysis device includes: a radiographic image acquisition section; a dosage data acquisition section that acquires dosage data indicating, in a time-series manner, a dosage of radiation rays exposed to a specific position in an imaging area in a specific period; and a determining section that determines whether the dosage data has a first feature indicating a dosage variation as a plurality of radiation absorbing bodies and a radiation transmitting body disposed between adjacent radiation absorbing bodies pass through a space between the specific position and a radiation source, and determines that the radiographic image corresponding to the dosage data determined to have the first feature is a rocking grid use image captured by rocking a rocking imaging grid.

Image analysis device, image analysis method, and program

An X-ray imaging apparatus may include an image acquirer configured to acquire a plurality of X-ray images of an object in different energy bands; and an image processor configured to perform scattering correction on the plurality of X-ray images to remove X-ray scattering from the plurality of X-ray images, perform material separation on the plurality of X-ray images on which the scattering correction has been performed to acquire material information of at least one material included in the object, and repeatedly perform the scattering correction and the material separation depending on whether a predetermined condition is satisfied.

X-ray imaging apparatus, image processing apparatus and image processing method

A subject image is acquired. A virtual model of the subject having a predetermined body thickness distribution is acquired. A composite image of an estimated primary X-ray image, which is obtained by estimating a primary X-ray image of the virtual model obtained by radiography from the virtual model, and an estimated scattered X-ray image, which is obtained by estimating a scattered X-ray image of the virtual model obtained by radiography from the virtual model, is generated as an estimated image which is obtained by estimating a radiographic image of the subject obtained by radiography. The body thickness distribution of the virtual model is corrected such that a difference between the estimated image and the subject image is reduced. The corrected body thickness distribution of the virtual model is determined as the body thickness distribution of the subject.

Radiographic image analysis device and method, and storage medium having stored therein program

PROBLEM TO BE SOLVED: To estimate, in an image analysis apparatus and method, and program, a subject's body thickness distribution by analyzing an image of the subject taken by irradiating the subject with radiation.SOLUTION: A radiographic image analysis method comprises: obtaining a subject's image Ik; obtaining a virtual model M of the subject having a prescribed body thickness distribution; generating a combined image of an estimated primary ray image and an estimated scattered ray image as an estimated image Im which estimate is estimated from a radiographic image to be obtained by radiographing the subject, the estimated primary ray image being obtained by estimating, from the virtual model M, a primary ray image to be obtained by radiographing the virtual model M, and the estimated scattered ray image being obtained by estimating, from the virtual model M, a scattered ray image to be obtained by radiographing the virtual model M; modifying a body thickness distribution of the virtual model M such that the difference between the estimated image Im and the subject's image Ik becomes smaller; and determining the modified body thickness distribution of the virtual model M as the body thickness distribution of the subject.

Satoshi Naito

Papers

Radiographic image processing device, method, and program

Radiographic image processing device, method, and recording medium

Radiation image processing device, method and program

Radiographic image analysis device and method, and storage medium having stored therein program

Radiographic image analysis apparatus and method, and program