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公开(公告)号：US20180025513A1
公开(公告)日：2018-01-25
申请号：US15541962
申请日：2015-01-09
Applicant: SHIMADZU CORPORATION
Inventor： Tommonori SAKIMOTO , Kazuyoshi NISHINO
CPC classification number: G06T11/008 , A61B6/025 , A61B6/03 , A61B6/04 , A61B6/4208 , A61B6/461 , A61B6/487 , A61B6/5205 , A61B6/5258 , A61B6/54 , G06T3/4007 , G06T11/006 , G06T2207/10116
Abstract: An image processing element 9 of the present invention includes a weighting factor setting element 9a that sets up a weighting factors wnn, wbi of the weight addition combing a nearest neighbor interpolation and a bilinear interpolation based on an absolute value |Ibi−Inn| of the difference between the pixel value acquired by the nearest neighbor interpolation and the pixel value Inn acquired by the bilinear interpolation; and a weight addition element 9b that implement a weighting addition based on the set-up weighting factors wnn, wbi. A reconstructed image can be acquired by arranging the backprojection pixel value Inew every pixel following the weighting. A reconstructed image can be obtained in which any noise and artifacts are reduced by setting the weighting factor of the image processing algorithm causing a negative effect on the region of some pixel values to be minimal and setting the weighting factor of the (other) image processing algorithm causing a positive-effect on the same pixel value region to be maximum based on the absolute value |Ibi−Inn| of the difference.
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公开(公告)号：US20220074873A1
公开(公告)日：2022-03-10
申请号：US17416501
申请日：2019-10-17
Applicant: SHIMADZU CORPORATION
Inventor： Takahiro MIYAJIMA , Junya YAMAMOTO , Kazuyoshi NISHINO
IPC: G01N23/046 , G06T7/00 , G06T7/70
Abstract: [Problem] To provide a radiographic image processing technique capable of detecting a metal marker from a radiographic image at high speed and with a high degree of accuracy.
[Solution] The above-described problem is solved by a radiographic image processing apparatus including: an acquisition unit configured to acquire a radiographic image reflecting a plurality of marker; a generation unit configured to generate a low-resolution image in which the resolution of the radiographic image has been reduced; a position identification unit configured to identify respective positions of a plurality of markers in the low-resolution image based on a characteristic of the plurality of markers; and a position estimation unit configured to estimate positions of the plurality of markers in the radiographic image by searching for positions on the radiographic image corresponding to the respective positions of the plurality of markers in the low-resolution image.-
公开(公告)号：US20200058108A1
公开(公告)日：2020-02-20
申请号：US16104518
申请日：2018-08-17
Applicant: Shimadzu Corporation
Inventor： Takahiro MIYAJIMA , Junya YAMAMOTO , Kazuyoshi NISHINO
Abstract: Provided is an image processing apparatus capable of assuredly finding a lung field that appears in an image even if a subject image appears in a radiation image in a rotated manner and assuredly performing a contrast adjustment with excellent visibility for the lung field. The image processing apparatus is provided with a sideways determination means 13 configured to determine that the subject image is turned sideways in the original image P0 when a minimum point P of a profile generated by summing or averaging pixel values belonging to each pixel column of the original image P0 for each pixel column is away from the center position of the subject image. The original image P0 determined as being turned sideways by the sideways determination portion 13 is rotated by the image rotation portion 16 and used for searching of the lung field.
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公开(公告)号：US20200064502A1
公开(公告)日：2020-02-27
申请号：US16530132
申请日：2019-08-02
Applicant: Shimadzu Corporation
Inventor： Takahiro MIYAJIMA , Junya YAMAMOTO , Kazuyoshi NISHINO
Abstract: A radiation image processing apparatus includes: a group processing unit classifying a plurality of metal markers into a first group relatively far from a detector and a second group relatively close to the detector based on the area of each image of the plurality of metal markers in a captured image; a marker classification unit classifying the plurality of metal markers based on the relative positions of the plurality of metal markers to on the image plane of the captured image for each of the classified groups; and a pair processing unit selecting the metal markers of the first group and the metal markers of the second group, of which the relative positions match each other, as a pair.
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公开(公告)号：US20190385015A1
公开(公告)日：2019-12-19
申请号：US16009684
申请日：2018-06-15
Applicant: Shimadzu Corporation
Inventor： Takahiro MIYAJIMA , Junya YAMAMOTO , Kazuyoshi NISHINO
Abstract: According to the present invention, a total value profile to be used for searching a lung field end is generated based on a radiation image. A pacemaker and an annotation reflected in a radiation image are merely reflected darkly in the image, and the existence is not particularly emphasized by edge enhancement. Therefore, the total value profile according to the present invention is not significantly affected by a pacemaker and/or an annotation. Therefore, according to the present invention, there occurs no false recognition regarding the end of the lung field due to a pacemaker and/or an annotation.
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Patent Agency Ranking
公开(公告)号：US20170325773A1
公开(公告)日：2017-11-16
申请号：US15152829
申请日：2016-05-12
Applicant: SHIMADZU CORPORATION
Inventor： Kazuyoshi NISHINO
IPC: A61B6/00
CPC classification number: A61B6/5241 , A61B6/0457 , A61B6/4452 , A61B6/5258 , A61B6/542 , A61B6/582
Abstract: An X-ray imaging device and method of operation is capable of acquiring a long-length image and is naturally connected. A configuration data of the signal intensity depending on the position along a moving direction of the long-length imaging is acquired by acquiring a model data prior to the long-length imaging, in order to obtain an approximate configuration. Next, the long-length imaging as to the subject is conducted and a brightness difference (difference of pixel values) takes place along the data line in the overlapping pixel regions relative to two X-ray images adjacent each other. According to the configuration data of the signal intensity, the offset correction value C in pixels (pixel coordinate) in the region other than the pixel regions from the difference Δ of pixel values in such overlapping pixel regions, the slot width D and the overlapping width d. An offset correction is conducted based on such offset correction value C and the X-ray images following the offset correction are connected to generate the long-length imaging so that the long-length image naturally connected can be obtained.
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公开(公告)号：US20130148779A1
公开(公告)日：2013-06-13
申请号：US13749565
申请日：2013-01-24
Applicant: SHIMADZU CORPORATION
Inventor： Daisuke NOTOHARA , Kazuyoshi NISHINO
IPC: A61B6/02
CPC classification number: A61B6/025 , A61B6/4085 , A61B6/4233 , A61B6/5205 , A61B6/5241 , G06T11/006 , G06T2211/421 , G06T2211/436
Abstract: Provided is a radiation tomography apparatus that performs radiography for a series of fluoroscopic images while moving a radiation source and a radiation detecting device synchronously in opposite directions to each other and obtains a tomographic image of a subject based on the fluoroscopic images. The radiation tomography apparatus allows to preview the tomographic image obtained through the radiography immediately after completion of the radiography. A preview image for previewing a sectional image of a subject is generated besides a tomographic image for diagnosis. The preview image can be obtained through simpler computing processing. Consequently, an operator sees once the preview image displayed on a display unit prior to the tomographic image for diagnosis, thereby determining to conduct radiography again quickly.
Abstract translation: 本发明提供一种放射线断层摄影装置，其在使辐射源和放射线检测装置以相反方向同步移动的同时进行一系列透视图像的X射线照相，并且基于荧光透视图像获得被检体的断层图像。 放射线断层摄影装置允许在放射照相术完成之后立即预览通过放射照相获得的断层图像。 除了用于诊断的断层图像之外，还生成用于预览被检体的剖面图像的预览图像。 可以通过更简单的计算处理来获得预览图像。 因此，操作者在用于诊断的断层图像之前，一次看到在显示单元上显示的预览图像，从而确定快速进行放射照相。
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公开(公告)号：US20200234436A1
公开(公告)日：2020-07-23
申请号：US16632172
申请日：2017-09-26
Applicant: Shimadzu Corporation
Inventor： Junya YAMAMOTO , Takahiro MIYAJIMA , Kazuyoshi NISHINO
IPC: G06T7/00
Abstract: A medical X-ray image processing apparatus (1) includes a controller (12) configured to acquire positional information of an imaging system (7) based on positional information of positional references (60) and evaluate symmetry of imaging positions of a plurality of X-ray captured images (15) with respect to a reference position (18) on a movement path of the imaging system (7) based on the acquired positional information of the imaging system (7).
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公开(公告)号：US20200013147A1
公开(公告)日：2020-01-09
申请号：US16488965
申请日：2018-02-26
Applicant: SHIMADZU CORPORATION
Inventor： Takahiro MIYAJIMA , Junya YAMAMOTO , Kazuyoshi NISHINO
Abstract: A center of gravity of a chest front image is obtained by a center of gravity calculation using pixel values in the chest front image, and a vicinity pixel position of the center of gravity is set as a center position P of a circular search region having a radius of a predetermined length. The shortest line segment of four line segments obtained by drawing perpendicular lines down from the center position P of an irradiation field to boundary lines of the upper, lower, left and right irradiation fields. The line segment, which is a radius of the circular search region, is rotationally displaced for each predetermined angle θ0, and the profile of the average value for each predetermined angle θ is obtained. From the displacement angle θ of the line segment in which the average value becomes minimum, the orientation of the subject from the head to the abdomen reflected in the chest front image is determined. On the other hand, the displacement angle θ of the two line segments (diameter line segment) in which the sum of the average values of the two line segments (diameter line segments) opposed at 180° in the profile of the average value is obtained as an inclination angle of the chest front image.
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公开(公告)号：US20190295247A1
公开(公告)日：2019-09-26
申请号：US15927673
申请日：2018-03-21
Applicant: Shimadzu Corporation
Inventor： Takahiro MIYAJIMA , Junya YAMAMOTO , Kazuyoshi NISHINO
Abstract: The apparatus is equipped with an intersection identification unit configured to generate a pixel value profile which is a profile indicating relevance between a position of each pixel in a pixel array crossing a contour and a lung field of a subject and a corresponding pixel value and a moving average profile which is a profile indicating relevance between the position of each target pixel and a moving average of a corresponding pixel value and search an intersection of both the profiles located at a position where the pixel value profile surpasses the moving average profile from a direction from a rear end to a front end of the pixel array.
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