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公开(公告)号：US20210383543A1
公开(公告)日：2021-12-09
申请号：US17406706
申请日：2021-08-19
Applicant: FUJIFILM Corporation
Inventor： Takahiro KAWAMURA
Abstract: A radiographic image processing device includes a radiographic image acquisition unit that acquires a plurality of radiographic images of a specific subject taken using radiations having energies different from each other, a structure recognition unit that recognizes structures, which is included in the subject, using the radiographic images, an attenuation coefficient calculation unit that calculates attenuation coefficients μ of the radiation for the structures, which are recognized by the structure recognition unit, using recognition results of the structure recognition unit and the plurality of radiographic images, and an image processing unit that performs image processing on the radiographic images using the attenuation coefficients.
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公开(公告)号：US20210353241A1
公开(公告)日：2021-11-18
申请号：US17388833
申请日：2021-07-29
Applicant: FUJIFILM Corporation
Inventor： Takahiro KAWAMURA
IPC: A61B6/00
Abstract: A body thickness distribution calculation unit calculates a body thickness distribution of the subject. A soft region specification unit specifies a soft region indicating a region of a soft part from a radiographic image. A subject information acquisition unit calculates the proportion of muscle and the proportion of fat in the soft region for each pixel using the body thickness distribution and a pixel value of the soft region.
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公开(公告)号：US20210106298A1
公开(公告)日：2021-04-15
申请号：US17063767
申请日：2020-10-06
Applicant: FUJIFILM Corporation
Inventor： Takahiro KAWAMURA
Abstract: An image generation unit generates a contrast-reduced image in which contrast in a region other than a soft part is reduced in a radiographic image indicating a subject including the soft part and a bone part. A body thickness derivation unit derives the body thickness of the subject based on the contrast-reduced image.
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公开(公告)号：US20190083054A1
公开(公告)日：2019-03-21
申请号：US16162512
申请日：2018-10-17
Applicant: FUJIFILM Corporation
Inventor： Takahiro KAWAMURA
Abstract: A frequency decomposition unit performs frequency decomposition for a first radiographic image to acquire a plurality of band images. A scattered radiation removal unit calculates a scattered radiation component that is caused by a subject and is included in a second radiographic image which has a linear relationship with the amount of radiation, using the second radiographic image, and removes the scattered radiation component from the second radiographic image to acquire a scattered-radiation-removed radiographic image. A conversion function determination unit determines a conversion function for converting at least one of the band images according to the scattered radiation component included in the second radiographic image. A reconstruction unit converts the band image, using the conversion function, and generates a converted band image. The reconstruction unit reconstructs the scattered-radiation-removed radiographic image and the converted band image to acquire a processed radiographic image.
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5.发明申请公开(公告)号：US20180293715A1
公开(公告)日：2018-10-11
申请号：US15920460
申请日：2018-03-14
Applicant: FUJIFILM CORPORATION
Inventor： Takahiro KAWAMURA
CPC classification number: G06T5/003 , A61B6/4266 , A61B6/5241 , A61B6/5258 , G01N23/04 , G01N2223/401 , G01N2223/42 , G06T3/4069 , G06T5/002 , G06T5/50 , G06T2207/10116 , G06T2207/10124 , G06T2207/20182 , G06T2207/20216 , G06T2207/30068
Abstract: An image acquisition unit acquires first and second radiographic images acquired by irradiating a first radiation detector and a second radiation detector which overlaps the first radiation detector so as to deviate from the first radiation detector by a half pixel with radiation which has been emitted from a radiation source and transmitted through an object. A corresponding positional relationship acquisition unit acquires a corresponding positional relationship between the position of pixels of the first radiographic image and the position of pixels of the second radiographic image. A resolution enhancement unit estimates a pixel value corresponding to a position between the pixels of the first radiographic image, on the basis of the corresponding positional relationship, a pixel value of the first radiographic image, and a pixel value of the second radiographic image, and generates a processed radiographic image having a higher resolution than the first and second radiographic images.
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Patent Agency Ranking
公开(公告)号：US20180068442A1
公开(公告)日：2018-03-08
申请号：US15659623
申请日：2017-07-26
Applicant: FUJIFILM Corporation
Inventor： Takahiro KAWAMURA
IPC: G06T7/00
Abstract: An image acquisition unit acquires first and second radiation images from first and second radiation detectors. A first frequency analysis unit generates a first high-frequency component and a first low-frequency component of the first radiation image, and a second frequency analysis unit generates a second low-frequency component of the second radiation image. A subtraction processing unit generates a subtraction low-frequency component from the first low-frequency component and the second low-frequency component, and a synthesis unit synthesizes the subtraction low-frequency component and the first high-frequency component to generate a processed image.
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公开(公告)号：US20170055933A1
公开(公告)日：2017-03-02
申请号：US15265030
申请日：2016-09-14
Applicant: FUJIFILM Corporation
Inventor： Takahiro KAWAMURA
CPC classification number: A61B6/5282 , A61B6/461 , A61B6/483 , A61B6/5211 , A61B6/5235 , G06T5/002 , G06T5/50 , G06T7/0012 , G06T11/005 , G06T2207/10116 , G06T2207/10124 , G06T2207/20016 , G06T2207/30004
Abstract: A frequency decomposition unit performs frequency decomposition for a first radiographic image to acquire a plurality of band images. A scattered radiation removal unit calculates a scattered radiation component that is caused by a subject and is included in a second radiographic image which has a linear relationship with the amount of radiation, using the second radiographic image, and removes the scattered radiation component from the second radiographic image to acquire a scattered-radiation-removed radiographic image. A conversion function determination unit determines a conversion function for converting at least one of the band images according to the scattered radiation component included in the second radiographic image. A reconstruction unit converts the band image, using the conversion function, and generates a converted band image. The reconstruction unit reconstructs the scattered-radiation-removed radiographic image and the converted band image to acquire a processed radiographic image.
Abstract translation: 频率分解单元对第一放射线照相图像执行频率分解以获取多个带图像。 散射辐射去除单元使用第二放射线照相图像计算被检体引起的散射的辐射成分，并且使用第二放射线照相图像包含在与放射线量成线性关系的第二放射线照相图像中， 放射照相图像以获得散射辐射去除的放射照相图像。 转换功能确定单元根据包括在第二放射线照相图像中的散射辐射分量来确定用于转换至少一个频带图像的转换功能。 重建单元使用转换功能转换带图像，并生成转换的带图像。 重建单元重建散射辐射去除的放射线照相图像和转换的带图像以获得经处理的放射照相图像。
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公开(公告)号：US20150379726A1
公开(公告)日：2015-12-31
申请号：US14843061
申请日：2015-09-02
Applicant: FUJIFILM CORPORATION
Inventor： Takahiro KAWAMURA
CPC classification number: G06T7/20 , A61B6/5264 , G06K9/4604 , G06K9/6298 , G06T5/20 , G06T5/40 , G06T7/269 , G06T2207/10116
Abstract: A contrast calculating unit calculates, as each of a contrast of a high frequency component and a contrast of a low frequency component of a transformed radiographic image, a contrast in a gradient direction of an edge portion in an analysis region with each of analysis points set by an analysis point setting unit being the center of the analysis region. A ratio calculating unit calculates, for each gradient direction, a ratio of the contrast of the high frequency component to the contrast of the low frequency component. A determining unit determines the smallest ratio as an index indicating the body motion, and determines whether or not there is a body motion during an imaging operation to take the radiographic image based on a result of statistical processing of the indexes at the analysis points. A display control unit displays a result of the determination on a display unit.
Abstract translation: 对比度计算单元计算分析区域中的边缘部分的梯度方向上的每个分析点设置的对比度，作为变换放射线照相图像的低频分量的对比度的高频分量和对比度的对比度 由分析点设定单元作为分析区域的中心。 比率计算单元针对每个梯度方向计算高频分量的对比度与低频分量的对比度的比率。 确定单元将最小比例确定为指示身体运动的指标，并且基于在分析点处的索引的统计处理的结果来确定在成像操作期间是否存在身体运动以拍摄放射线照相图像。 显示控制单元在显示单元上显示确定的结果。
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9.发明公开公开(公告)号：US20240260891A1
公开(公告)日：2024-08-08
申请号：US18614758
申请日：2024-03-25
Applicant: FUJIFILM CORPORATION
Inventor： Takahiro KAWAMURA
CPC classification number: A61B5/4509 , A61B5/0035 , A61B5/055 , A61B5/4566 , A61B5/7267 , A61B5/7275 , A61B6/505 , A61B6/5217 , A61B6/5247 , G06T7/0012 , G06T2207/10116 , G06T2207/20076 , G06T2207/20081 , G06T2207/20084 , G06T2207/20224 , G06T2207/30012
Abstract: A processor is configured to acquire a first and a second radiation image which are acquired by imaging a subject including a bone part and a soft part with radiation having different energy distributions, perform weighting subtraction on the first radiation image and the second radiation image to derive a bone part image representing a bone tissue of the subject and a soft part image representing a soft tissue of the subject, derive a bone mineral density for each pixel in a target bone region of the subject from the bone part image, acquire a pixel value for each pixel of a corresponding region, which corresponds to the target bone region, in the soft part image, and derive a fracture probability of a target bone from the bone mineral density for each pixel in the target bone region and the pixel value for each pixel in the corresponding region.
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公开(公告)号：US20220287673A1
公开(公告)日：2022-09-15
申请号：US17577335
申请日：2022-01-17
Applicant: FUJIFILM CORPORATION
Inventor： Takahiro KAWAMURA
IPC: A61B6/00
Abstract: At least one standard image representing a standard object having different thicknesses, the at least one standard image being obtained by imaging the standard object by radiation in a state in which an object is interposed between the standard object and a radiation detector is acquired, a relationship between the thickness of the standard object and a radiation attenuation coefficient of the standard object, which corresponds to an energy characteristic of the radiation, the relationship reflecting an influence of beam hardening by the standard object and the object, is derived, a primary ray component corresponding to the thickness of the standard object included in the standard image is derived based on the relationship between the thickness of the standard object and the radiation attenuation coefficient of the standard object, a scattered ray component corresponding to the thickness of the standard object included in the standard image is derived based on a difference between the standard image and the primary ray component, and a scattered ray model representing a relationship between the thickness of the standard object and a ratio of the scattered ray component to the primary ray component is derived.
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