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1. 发明授权

US07876874B2 Radiographing apparatus and image processing program 有权
标题翻译：射线照相设备和图像处理程序
公开(公告)号：US07876874B2
公开(公告)日：2011-01-25
申请号：US11914520
申请日：2006-05-12
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Yasuo Omi
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Yasuo Omi
IPC分类号： G01N23/087
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4021 , A61B6/482
摘要： A radiographing apparatus according to an aspect of the present invention is characterized in that an image processing device comprises an acquisition device which acquires projection data of a first energy spectrum and projection data of a second energy spectrum, and a synthetic image generating device which synthesizes a first image on the basis of the projection data of the first energy spectrum, and a second image on the basis of the projection data of the second energy spectrum according to a predetermined synthetic condition, and generating a synthetic image, and a display device displays the generated synthetic image.
摘要翻译：根据本发明的一个方面的放射照相装置的特征在于，图像处理装置包括获取第一能谱的投影数据和第二能量的投影数据的获取装置，以及合成图像生成装置基于第一能谱的投影数据的第一图像和根据预定合成条件的第二能谱的投影数据的第二图像，并且生成合成图像，并且显示装置显示第一图像生成合成图像。

2. 发明申请

US20090147919A1 RADIOGRAPHING APPARATUS AND IMAGE PROCESSING PROGRAM 有权
标题翻译：放映设备和图像处理程序
公开(公告)号：US20090147919A1
公开(公告)日：2009-06-11
申请号：US11914520
申请日：2006-05-12
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Yasuo Omi
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Yasuo Omi
IPC分类号： G01N23/201 , G06K9/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4021 , A61B6/482
摘要： A radiographing apparatus according to an aspect of the present invention is characterized in that an image processing device comprises an acquisition device which acquires projection data of a first energy spectrum and projection data of a second energy spectrum, and a synthetic image generating device which synthesizes a first image on the basis of the projection data of the first energy spectrum, and a second image on the basis of the projection data of the second energy spectrum according to a predetermined synthetic condition, and generating a synthetic image, and a display device displays the generated synthetic image.
摘要翻译：根据本发明的一个方面的放射照相装置的特征在于，图像处理装置包括获取第一能谱的投影数据和第二能量的投影数据的获取装置，以及合成图像生成装置基于第一能谱的投影数据的第一图像和根据预定合成条件的第二能谱的投影数据的第二图像，并且生成合成图像，并且显示装置显示第一图像生成合成图像。

3. 发明申请

US20090141854A1 X-RAY CT APPARATUS 有权
标题翻译： X射线CT装置
公开(公告)号：US20090141854A1
公开(公告)日：2009-06-04
申请号：US12301713
申请日：2007-05-24
申请人： Koichi Hirokawa , Taiga Goto , Yoshiaki Sugaya , Osamu Miyazaki
发明人： Koichi Hirokawa , Taiga Goto , Yoshiaki Sugaya , Osamu Miyazaki
IPC分类号： H05G1/66 , G06K9/00
CPC分类号： A61B6/032 , A61B6/542 , A61B6/545
摘要： An X-ray CT apparatus is provided, having a function for deciding an X-ray imaging condition prior to scanning, the X-ray imaging condition allowing an acquisition of contrast to noise ratio appropriate for identifying a diagnostic object. Prior to the real scan, a three-dimensional model of an object is estimated from scanogram projection data of the object, a contrast to noise ratio enabling identification of the diagnostic object is calculated, based on the diagnostic object size set by an operator via an operating device when planning the scan, the three-dimensional model, and a standard imaging condition that is stored in a storage device. Then, an optimum irradiated X-ray condition (tube current and tube voltage) is calculated for achieving the contrast to noise ratio enabling identification. The X-ray condition being calculated is displayed in the form of information such as image SD value and exposure dose, under the calculated X-ray condition and under other condition.
摘要翻译：提供一种X射线CT装置，其具有用于在扫描之前决定X射线成像条件的功能，所述X射线成像条件允许获取适于识别诊断对象的对比度与噪声比。在真实扫描之前，根据对象的扫描图投影数据估计对象的三维模型，基于由操作者经由操作者设置的诊断对象尺寸来计算能够识别诊断对象的对比度与噪声比规划扫描时的操作装置，三维模型以及存储在存储装置中的标准成像条件。然后，计算最佳照射X射线条件（管电流和管电压），以实现能够识别的对比度与噪声比。在计算的X射线条件下和其他条件下，计算的X射线条件以诸如图像SD值和曝光剂量的信息的形式显示。

4. 发明授权

US07505550B2 Radiotomography apparatus 有权
标题翻译：放射摄影仪
公开(公告)号：US07505550B2
公开(公告)日：2009-03-17
申请号：US11629756
申请日：2005-06-15
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Hiroto Kokubun
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Hiroto Kokubun
IPC分类号： A61B6/00
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , A61B6/541 , G06T2211/412
摘要： A radiotomograph comprises radiation detecting means which applies radiation from a radiation source to a subject from many direction and detects radiation transmitted through the subject from the directions, a bed on which the subject lies and which can move the subject in the direction of the body axis of the subject, reconstruction parameter setting means which sets reconstruction parameters including the amount of movement of the bed in the direction of the body axis and used to reconstruct, an image of the subject, reconstruction view area calculating means which calculates the reconstruction view area for at least one data segment necessary for reconstruction calculation determined for each position in a space reconstructed according to the set reconstruction parameters, reference segment position setting means which sets a reference segment position in the calculated reconstruction view area according to a phase signal generated by dynamic state analysis of the subject, effective segment calculating means which calculates an effective segment from the data segment containing the set reference segment position using a predetermined weight function, and image creating means for creating an image by reconstructing the calculated effective segment. With this, a radiotomograph both having an improved time resolution and enabling reduced effective radiation exposure can be provided.
摘要翻译：放射图像仪包括辐射检测装置，其从多个方向向受检者施加辐射，并从被检者所在的方向上检测通过被检体的方向传播的辐射，并且可以沿着身体轴线的方向移动受检者重建参数设置装置，其重建参数，其包括床体在身体轴线方向上的运动量并用于重构对象的重建参数，重建视区计算装置，其计算重建视区，根据所设定的重建参数重建的空间中的每个位置确定重建计算所需的至少一个数据段，基准段位置设定装置，根据由动态生成的相位信号，在计算出的重建视区内设定基准段位置分析主题，效果 e段计算装置，其使用预定的权重函数从包含所述设置的参考段位置的数据段计算有效段;以及图像创建装置，用于通过重建所计算的有效段来创建图像。因此，可以提供具有改善的时间分辨率并且能够实现减少的有效辐射暴露的放射图像仪。

5. 发明申请

US20070126730A1 Image processing method, image processing device, computer aided detection, and method for filtering along the time axis 有权
标题翻译：图像处理方法，图像处理装置，计算机辅助检测和时间轴滤波方法
公开(公告)号：US20070126730A1
公开(公告)日：2007-06-07
申请号：US10579514
申请日：2004-11-08
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
IPC分类号： G06T1/00 , G06F17/00
CPC分类号： A61B6/504 , A61B5/02007 , A61B5/055 , A61B6/032 , A61B6/481 , G01R33/56325 , G01R33/5635 , G06T5/002 , G06T5/008 , G06T5/50 , G06T2207/10081 , G06T2207/10088 , G06T2207/10132 , G06T2207/20182 , G06T2207/20224 , G06T2207/30101
摘要： An image processing method comprises: an inputting step of inputting image data which is obtained by imaging a subject for a predetermined period of time with a medical imaging apparatus and is arranged in time series; an extracting along the time axis step of extracting pixels which satisfy a predetermined condition along the time axis from all the pixels arranged in time series for each pixel coordinate position with respect to each pixel in the image data; and a constructing step of constructing a two-dimensional or three-dimensional image based on the pixels extracted along the time axis in the extracting along the time axis step.
摘要翻译：一种图像处理方法包括：输入步骤，输入通过用医学成像装置对被摄体成像一段预定时间而获得的图像数据，并且以时间顺序排列; 沿着时间轴步骤提取相对于图像数据中的每个像素从针对每个像素坐标位置以时间序列布置的全部像素沿时间轴提取满足预定条件的像素; 以及构建步骤，其基于沿着时间轴步骤的提取中沿着时间轴提取的像素构建二维或三维图像。

6. 发明申请

US20080273778A1 Image Reconstruction Method and Tomograph 有权
标题翻译：图像重建方法和图像
公开(公告)号：US20080273778A1
公开(公告)日：2008-11-06
申请号：US10588257
申请日：2005-02-15
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
IPC分类号： A61B6/03 , G06K9/00
CPC分类号： G06T11/006 , A61B6/027 , A61B6/032 , G06T2211/412 , G06T2211/421
摘要： A weighting function is created according to an arbitrary bio-movement correction range and a projection data angle for back-projection (width in the view direction used for reconstruction), set by a user, by considering the degree of the bio-movement and redundancy. By using this weighting function, an image reconstruction is performed.The bio-movement correction range is set as a correction angle width index ε expressing the width guaranteed as a slope portion of the weighting function. The projection data angle for back-projection (data width) is determined by considering the data redundancy, SN, time width (time resolution) contributing to the image.By determining the weight according to these two parameters, it is possible to apply reconstruction of projection data of all the scan ranges in the reconstruction of the tomogram and prevent lowering of the data contribution ratio as well as reduce the motion artifact, thereby obtaining a high-quality image.
摘要翻译：根据用户设定的任意生物移动校正范围和背投影投影数据角度（用于重建的视线方向的宽度），通过考虑生物移动和冗余度来创建加权函数。通过使用该加权函数，执行图像重建。生物运动校正范围被设定为表示作为加权函数的斜率部分保证的宽度的校正角宽度指数ε。通过考虑对图像有贡献的数据冗余度，SN，时间宽度（时间分辨率）来确定反投影的投影数据角度（数据宽度）。通过根据这两个参数确定权重，可以在重建断层图像中应用所有扫描范围的投影数据的重建，并且防止数据贡献率的降低以及减少运动伪像，从而获得高质量形象。

7. 发明申请

US20070189436A1 Radiotomography apparatus 有权
标题翻译：放射摄影仪
公开(公告)号：US20070189436A1
公开(公告)日：2007-08-16
申请号：US11629756
申请日：2005-06-15
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Hiroto Kokubun
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa , Hiroto Kokubun
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , A61B6/541 , G06T2211/412
摘要： A radiotomography apparatus according to the present invention includes a radiation detection device that irradiates radiation from a radiation source in multiple directions around an object to be examined and detects radiation transmitted through the object from the multiple directions; a table on which the object lies and which can move the object in a body axis direction of the object; reconstruction parameter setting device that sets reconstruction parameters that include an amount of movement of the table in the body axis direction, and that are used to reconstruct an image of the object; a reconstruction view area calculating device that calculates a reconstruction view area for at least one data segment that is necessary for a reconstruction calculation that is determined for each spatial position that is reconstructed based on the set reconstruction parameters; a reference segment position setting device that sets a reference segment position in the calculated reconstruction view area according to a phase signal that is obtained by dynamic analysis of the object; an effective segment calculating device that calculates a data segment including the set reference segment position as an effective segment using a predetermined weight function; and an image creating device that creates an image by reconstructing the calculated effective segments. It is thus possible to provide a radiotomography apparatus that can both enhance temporal resolution and reduce ineffective radiation exposure.
摘要翻译：根据本发明的放射摄影术装置包括：放射线检测装置，其从围绕被检体的多个方向照射来自辐射源的辐射，并从多个方向检测透过物体的辐射; 物体所在的桌子，并且可以在物体的身体轴线方向上移动物体; 重建参数设置装置，其设置包括所述表在所述体轴方向上的移动量的重建参数，并且用于重建所述对象的图像; 重构视区计算装置，其根据所设置的重建参数，计算针对重建计算确定的每个空间位置所确定的至少一个数据段的重构视区; 参考分段位置设定装置，根据通过物体的动态分析获得的相位信号，在计算出的重建视区内设定基准分段位置; 有效段计算装置，其使用预定的权重函数来计算包括所设置的参考段位置的数据段作为有效段; 以及通过重建所计算的有效段来创建图像的图像创建装置。因此，可以提供能够增强时间分辨率并减少无效辐射暴露的放射摄影术设备。

8. 发明授权

US08175217B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US08175217B2
公开(公告)日：2012-05-08
申请号：US12742797
申请日：2008-11-17
申请人： Yoshiaki Sugaya , Taiga Goto , Koichi Hirokawa , Osamu Miyazaki
发明人： Yoshiaki Sugaya , Taiga Goto , Koichi Hirokawa , Osamu Miyazaki
IPC分类号： A61B6/03
CPC分类号： A61B6/481 , A61B6/032 , A61B6/488 , A61B6/542 , H05G1/30
摘要： An X-ray CT apparatus is provided with an X-ray tube current modulation pattern calculation means that calculates an X-ray tube current modulation pattern based on a 3-dimensional model of an object calculated based on a scanogram image of the object, start-up shape acquisition means that acquires a start-up shape of CT values of a predetermined region of the object or CT value time differences after injecting contrast agent into the object, time contrast curve prediction means that predicts a time contrast curve indicative of a time sequential change of contrast in a diagnostic portion of the object at each slice position at a scan time based on the acquired start-up shape of the CT values or CT value time differences, object 3-dimensional model modification means that modifies a 3-dimensional model of the object based on the predicted time contrast curve, and X-ray tube electric current modulation pattern modification means that modifies the X-ray tube electric current modulation pattern based on the modified 3-dimensional model of the object.
摘要翻译： X射线CT装置设置有：X射线管电流调制图案计算装置，其基于基于对象的扫描图像计算的对象的3维模型来计算X射线管电流调制图案，起始 - 对象形状获取装置，用于获取对象的预定区域的CT值的启动形状或将对比剂注入对象后的CT值时间差;时间对比度曲线预测装置，其预测指示时间的时间对比度曲线基于获取的CT值的启动形状或CT值时间差，在扫描时刻的每个切片位置处的对象的诊断部分中的对比度的顺序变化，对象3维模型修改装置，其修改3维基于预测时间对比曲线的对象模型和X射线管电流调制模式修改装置，其修改X射线管电流调制拍摄基于对象的修改后的三维模型。

9. 发明申请

US20060165211A1 X-ray tomograph 有权
标题翻译： X光断层扫描仪
公开(公告)号：US20060165211A1
公开(公告)日：2006-07-27
申请号：US10524341
申请日：2003-08-28
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/4085 , G06T2211/421
摘要： A tomograph which determines projection data phase range capable of back projection for each reconfigured voxel with an arbitrary value larger than π so that the absolute values of cone angles at the ends of this phase range is minimized, calculates an approximate straight line for a curve indicating the position of a radiation source with respect to the channel direction position of parallel beam projection data obtained by a parallel beam of a parallel shape viewed from the go-around axis direction generated from the radiation source, and based on the determined projection data range capable of back projection, three-dimension back projects the parallel beam projection data subjected to filter processing created through a filter correction to the back projection region corresponding to the region in concern along the approximate irradiation trace of the radiation beam calculated using the calculated approximate straight line, thereby suppressing generation of the distortion attributed to data discontinuity, simplifying an arcsin calculation and significantly increasing the processing speed of the tomograph.
摘要翻译：确定能够以大于pi的任意值对每个重新配置的体素进行反投影的投影数据相位范围的断层图像，使得在该相位范围的末端处的锥角的绝对值最小化，计算出曲线的近似直线，辐射源相对于由从辐射源产生的从复原轴线方向观察的平行光束的平行光束投影数据的通道方向位置的位置，并且基于所确定的投影数据范围能够背投影，三维后投影通过滤波器校正产生的滤波处理的平行光束投影数据沿着与所计算的近似直线计算的辐射束的近似照射轨迹相对应的区域的背投影区域，从而抑制失真属性的产生减少数据不连续性，简化了arcsin计算，并显着提高了层析成像的处理速度。

10. 发明授权

US07949170B2 Image processing method, image processing device, computer aided detection, and method for filtering along the time axis 有权
标题翻译：图像处理方法，图像处理装置，计算机辅助检测和时间轴滤波方法
公开(公告)号：US07949170B2
公开(公告)日：2011-05-24
申请号：US10579514
申请日：2004-11-08
申请人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
发明人： Taiga Goto , Osamu Miyazaki , Koichi Hirokawa
IPC分类号： G06K9/00
CPC分类号： A61B6/504 , A61B5/02007 , A61B5/055 , A61B6/032 , A61B6/481 , G01R33/56325 , G01R33/5635 , G06T5/002 , G06T5/008 , G06T5/50 , G06T2207/10081 , G06T2207/10088 , G06T2207/10132 , G06T2207/20182 , G06T2207/20224 , G06T2207/30101
摘要： An image processing method comprises: an inputting step of inputting image data which is obtained by imaging a subject for a predetermined period of time with a medical imaging apparatus and is arranged in time series; an extracting along the time axis step of extracting pixels which satisfy a predetermined condition along the time axis from all the pixels arranged in time series for each pixel coordinate position with respect to each pixel in the image data; and a constructing step of constructing a two-dimensional or three-dimensional image based on the pixels extracted along the time axis in the extracting along the time axis step.
摘要翻译：一种图像处理方法包括：输入步骤，输入通过用医学成像装置对被摄体成像一段预定时间而获得的图像数据，并且以时间顺序排列; 沿着时间轴步骤提取相对于图像数据中的每个像素从针对每个像素坐标位置以时间序列布置的全部像素沿时间轴提取满足预定条件的像素; 以及构建步骤，其基于沿着时间轴步骤的提取中沿着时间轴提取的像素构建二维或三维图像。

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