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21. 发明授权

US07945013B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US07945013B2
公开(公告)日：2011-05-17
申请号：US12527009
申请日：2008-02-14
申请人： Taiga Goto , Koichi Hirokawa , Toshiyuki Irie
发明人： Taiga Goto , Koichi Hirokawa , Toshiyuki Irie
IPC分类号： A61B6/00
CPC分类号： A61B5/4869 , A61B6/50 , A61B6/505 , A61B6/542
摘要： An X-ray CT apparatus acquires a scanogram of an object to be examined, generates an ellipse model having an X-ray attenuation coefficient equivalent to that of water and approximated to a tomographic image of the obtained imaged portion from the feature quantity of the projection value profile, determines whether or not the generated elliptic model is adequate as a model of the imaged portion from another feature quantity with respect to the projection value profile, generates a corrected elliptic model according to yet another feature quantity with respect to the projection value profile if the elliptic model is determined to be inadequate, and controls the modulation of the tube current in an X-ray source so that a predetermined target SD value is maintained in any scanning position when a tomographic image is reconstructed according to X-rays transmitted through the object by using the elliptic model or the corrected elliptic model.
摘要翻译： X射线CT装置获取待检查对象的扫描图，生成具有与水的X射线衰减系数相当的X射线衰减系数的椭圆模型，并从投影的特征量近似于所获得的成像部的断层图像值轮廓，根据另一特征量相对于投影值轮廓确定生成的椭圆模型是否足够作为成像部分的模型，根据与投影值轮廓相关的另一特征量生成校正的椭圆模型如果椭圆模型被确定为不足，并且控制X射线源中的管电流的调制，使得当根据透射的X射线重建断层图像时，在任何扫描位置保持预定的目标SD值该对象通过使用椭圆模型或校正的椭圆模型。

22. 发明授权

US08971607B2 X-ray CT apparatus and image reconstruction method 有权
标题翻译： X射线CT装置及图像重建方法
公开(公告)号：US08971607B2
公开(公告)日：2015-03-03
申请号：US13989564
申请日：2011-12-07
申请人： Taiga Goto , Hisashi Takahashi , Koichi Hirokawa
发明人： Taiga Goto , Hisashi Takahashi , Koichi Hirokawa
IPC分类号： G06K9/00 , G06T11/00 , A61B6/03 , A61B6/00
CPC分类号： G06T11/003 , A61B6/032 , A61B6/4078 , G06T11/006 , G06T2211/421
摘要： In order to execute a high-resolution reconstructible distance-driven back projection process and to generate a high-resolution tomographic image, an X-ray CT apparatus 1 determines the presence/absence of opposing data corresponding to each piece of target data on the basis of scanning conditions, and calculates a phase range where opposing data is present (Step 21). The X-ray CT apparatus 1 performs high-resolution conversion of a zero-insertion method on a phase range where opposing data is present, and performs high-resolution conversion using a data interpolation method on a phase range where no opposing data is present, thereby creating double sampled high-resolution projection data, and calculates a view weight (Step 22). The X-ray CT apparatus 1 performs a distance-driven high-resolution back projection process using high-resolution projection data and generates a reconstructed image (Step 23).
摘要翻译：为了执行高分辨率可重构的距离驱动反投影处理并生成高分辨率断层图像，X射线CT装置1基于每个目标数据确定对应的数据的存在/不存在并计算相对数据存在的相位范围（步骤21）。 X射线CT装置1在存在相对数据的相位范围上执行零插入方式的高分辨率变换，并且在不存在相反数据的相位范围上使用数据插值方法进行高分辨率转换，从而产生双重采样的高分辨率投影数据，并计算视图权重（步骤22）。 X射线CT装置1使用高分辨率投影数据进行距离驱动的高分辨率反投影处理，并生成重构图像（步骤23）。

23. 发明申请

US20140193055A1 IMAGE RECONSTRUCTION DEVICE AND IMAGE RECONSTRUCTION METHOD 有权
标题翻译：图像重建设备和图像重构方法
公开(公告)号：US20140193055A1
公开(公告)日：2014-07-10
申请号：US14128769
申请日：2012-07-05
申请人： Hisashi Takahashi , Taiga Goto , Koichi Hirokawa
发明人： Hisashi Takahashi , Taiga Goto , Koichi Hirokawa
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/412 , G06T2211/424
摘要： To provide an image reconstruction device capable of creating an image with image quality matching the operator's request when a cross-sectional image is reconstructed through a repeated calculation, the image reconstruction device which performs a repeated calculation on the basis of a difference between calculated projection data and measured projection data, the calculated projection data being obtained by performing a forward projection calculation on a reconstructed image which is reconstructed based on the measured projection data, includes an input section to which an image quality parameter which is considered to be important by an operator is input, a weight calculation section that calculates a weighting coefficient on the basis of the image quality parameter, and a repeated calculation section that performs a repeated calculation on the basis of a value obtained by weighting and adding a pixel value obtained in the previous iteration to a pixel value obtained from now using the weighting coefficient.
摘要翻译：为了提供一种能够通过重复计算重建横截面图像时，能够创建具有与操作者的请求相匹配的图像质量的图像重建装置，该图像重建装置基于计算出的投影数据之间的差进行重复计算并且测量的投影数据，通过对基于测量的投影数据重建的重建图像执行前向投影计算而获得的所计算的投影数据包括输入部分，被认为对于运营商来说重要的图像质量参数基于图像质量参数计算加权系数的权重计算部分，以及基于通过对在先前迭代中获得的像素值进行加权和相加而获得的值来执行重复计算的重复计算部分到从现在使用的像素值加权系数。

24. 发明申请

US20130028500A1 RECONSTRUCTION COMPUTING DEVICE, RECONSTRUCTION COMPUTING METHOD, AND X-RAY CT APPARATUS 有权
标题翻译：重建计算设备，重建计算方法和X射线CT设备
公开(公告)号：US20130028500A1
公开(公告)日：2013-01-31
申请号：US13635391
申请日：2011-03-29
申请人： Hisashi Takahashi , Taiga Goto , Koichi Hirokawa
发明人： Hisashi Takahashi , Taiga Goto , Koichi Hirokawa
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/06 , A61B6/5205 , G06T11/006 , G06T2211/424
摘要： In order to provide a reconstruction computing device, a reconstruction computing method, and an X-ray CT apparatus capable of improving the image quality while reducing the amount of computation when reconstructing an X-ray CT image using an iterative method, a reconstruction computing device divides an initial image 50 reconstructed using an analytical method such as an FBP method into a bed region 51, an object region 52, and the other air region 53, sets reconstruction conditions including at least convergence conditions and a pixel size for each of the divided regions, updates estimation images by performing an iterative process, and fixes estimation images or forward projection data of a subset satisfying the convergence conditions until other subsets satisfy the convergence conditions.
摘要翻译：为了提供一种重建计算装置，重构计算方法和能够在使用迭代方法重建X射线CT图像的同时减少计算量的同时提高图像质量的X射线CT装置，重建计算装置将使用诸如FBP方法的分析方法重建的初始图像50划分到床区域51，对象区域52和另一空气区域53中，设置至少包括收敛条件的重建条件和分割的每个的像素大小区域，通过执行迭代处理更新估计图像，并且修正满足收敛条件的子集的估计图像或前向投影数据，直到其他子集满足收敛条件。

25. 发明申请

US20090257553A1 X-RAY CT APPARATUS AND IMAGE NOISE REDUCTION METHOD 审中-公开
标题翻译： X射线CT装置和图像噪声减少方法
公开(公告)号：US20090257553A1
公开(公告)日：2009-10-15
申请号：US12374161
申请日：2007-07-18
申请人： Taiga Goto , Koichi Hirokawa
发明人： Taiga Goto , Koichi Hirokawa
IPC分类号： H05G1/60
CPC分类号： G06T11/005 , A61B6/032
摘要： An X-ray CT apparatus that can obtain a tomogram having high spatial resolution without increasing the effect of system noise and dosage is provided. The X-ray CT apparatus has an X-ray source for emitting X-ray, an X-ray detector having plural X-ray detecting elements that detect X-ray transmitted through an examinee as attenuation data and are arranged in a channel direction, a data combining unit for combining attenuation data of plural X-ray detecting elements in the channel direction to obtain composite data, a data decomposing unit for decomposing composite data to obtain respective decomposition data of the plural X-ray detecting elements, and an image re-constructing unit for re-constructing an image of the examinee by using the decomposition data.
摘要翻译：提供了可以获得具有高空间分辨率而不增加系统噪声和剂量的影响的X射线CT装置。 X射线CT装置具有用于发射X射线的X射线源，具有多个X射线检测元件的X射线检测器，该X射线检测元件检测通过受检者发射的X射线作为衰减数据并沿通道方向排列，数据组合单元，用于组合在信道方向上的多个X射线检测元件的衰减数据以获得复合数据;数据分解单元，用于分解复合数据以获得多个X射线检测元件的各自的分解数据;以及图像恢复 - 构造单元，用于通过使用分解数据重新构造受检者的图像。

26. 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。

27. 发明申请

US20080240336A1 X-Ray Ct Apparatus 有权
标题翻译： X射线照射装置
公开(公告)号：US20080240336A1
公开(公告)日：2008-10-02
申请号：US11887875
申请日：2006-03-31
申请人： Osamu Miyazaki , Koichi Hirokawa , Hironori Ueki
发明人： Osamu Miyazaki , Koichi Hirokawa , Hironori Ueki
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/542
摘要： An X-ray CT apparatus of the present invention includes: an X-ray source which irradiates X-rays; an X-ray detector which is arranged oppositely to the X-ray source and detects the irradiated X-rays; a scanner having a rotary disk which rotatably supports the X-ray source and X-ray detector and a power source of the rotary disk; an image processing device which makes the scanner rotate in a state where an object is inserted in between the X-ray source and the X-ray detector to irradiate the object with X-rays from directions at a plurality of angles, and makes the X-ray detector detect X-rays transmitted through the object in directions at a plurality of angles as projection data, to reconstruct a tomographic image of the object by the use of the projection data in the directions at the plurality of angles; a display device which displays the reconstructed tomographic image; a setting device which sets X-ray irradiation condition candidate by at least one combination of a tube current and a tube voltage for power to be supplied to the X-ray source by the use of a transmission thickness of a scanning subject site of the object; and a control device which supplies the with an X-ray irradiation condition corresponding to the set X-ray irradiation condition candidate, to perform scanning, and in the X-ray CT apparatus, the setting device sets X-ray irradiation condition candidate by at least one combination of a tube current and tube voltage for power to be supplied to the X-ray source by the use of an X-ray absorption coefficient of said scanning subject site of the object, and the control device makes the display device selectably display each of the set X-ray irradiation condition candidates which is provided for a diagnosis of a requested tissue of the object, to take control such that a tomographic image of the object is taken according to the selected X-ray irradiation condition candidate.
摘要翻译：本发明的X射线CT装置包括：照射X射线的X射线源; 与X射线源相对设置的X射线检测器，检测照射的X射线; 扫描器，具有可旋转地支撑X射线源和X射线检测器的旋转盘和旋转盘的电源; 使得扫描仪在X射线源和X射线检测器之间插入物体的状态下旋转的图像处理装置，以从多个角度的方向向X方向照射物体，使X 射线检测器以多个角度的方向检测透过物体的X射线作为投影数据，通过使用多个角度方向的投影数据来重建物体的断层图像; 显示重建的断层图像的显示装置; 设置装置，其通过使用所述物体的扫描对象位置的透射厚度，通过管电流和管电压的至少一个组合来设置X射线照射条件候选，以供应给所述X射线源的功率 ; 以及控制装置，其提供与所设定的X射线照射条件候选相对应的X射线照射条件，以进行扫描，并且在X射线CT装置中，设定装置将X射线照射条件候补设定在用于通过使用物体的所述扫描对象位置的X射线吸收系数向X射线源供给功率的管电流和管电压的至少一个组合，并且所述控制装置使得所述显示装置可选择地显示根据所选择的X射线照射条件候选，设置用于对被检体的要求组织进行诊断的所设定的X射线照射条件候补中的每一个进行控制，使得对象的断层图像被拍摄。

28. 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。

29. 发明授权

US08189736B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US08189736B2
公开(公告)日：2012-05-29
申请号：US12671872
申请日：2008-08-06
申请人： Koichi Hirokawa , Taiga Goto , Takayuki Kadomura
发明人： Koichi Hirokawa , Taiga Goto , Takayuki Kadomura
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/405 , A61B6/482 , A61B6/488 , A61B6/545
摘要： Provided is an X-ray CT apparatus which can perform CT scan of multi-energy scanning at a high speed and can obtain an image having an excellent substance distinguishing ability. The X-ray CT apparatus includes: means to continuously perform a first CT scanning using a first X-ray energy and a second CT scanning using a second X-ray energy without interrupting CT scan; means to transit the X-ray energy emitted from the X-ray during a transition period TR including an end of the first CT scanning and a beginning of the second CT scanning from the first X-ray energy to the second X-ray energy; and means to compensate the scan data in the transition period by the opposing data in the residual scan period so as to reconstruct an image.
摘要翻译：本发明提供能够高速进行多能量扫描的CT扫描的X射线CT装置，能够得到具有优异的物质辨别能力的图像。 X射线CT装置包括：使用第一X射线能量和第二次CT扫描连续进行第一次CT扫描的装置，使用第二X射线能量而不中断CT扫描; 在包括第一CT扫描的结束和从第一X射线能量开始到第二X射线能量的过渡期间TR中将从X射线发射的X射线能量传递到第二X射线能量的装置; 以及用于在所述剩余扫描周期中通过相对数据补偿所述过渡期间中的扫描数据以便重构图像的装置。

30. 发明授权

US07983383B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US07983383B2
公开(公告)日：2011-07-19
申请号：US12518812
申请日：2007-12-12
申请人： Takayuki Kadomura , Taiga Goto , Koichi Hirokawa
发明人： Takayuki Kadomura , Taiga Goto , Koichi Hirokawa
IPC分类号： G01N23/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4035 , A61B6/482
摘要： An X-ray CT apparatus comprising: a scanner unit for rotating one or more X-ray sources for applying X-ray beams having different energy spectra to an object, and detectors disposed opposed to the X-ray sources for detecting transmitted X-ray data on the object, around the object while applying X-rays, reconstructing means for reconstructing a tomogram of the object by acquiring transmitted X-ray data on the object including the two or more different energy spectra by using the scanner, and display means for displaying the reconstructed tomogram; the X-ray CT apparatus further comprising input means for inputting information on an identification tissue of the object to be identified and a separate tissue to be separated from the identification tissue from the tomogram and scanning condition determining means for determining the scanning condition for identifying the identification tissue from the tomogram.With this, an optimum scanning condition of a multi-energy X-ray CT apparatus can be determined.
摘要翻译：一种X射线CT装置，包括：扫描器单元，用于旋转一个或多个X射线源，用于将具有不同能量谱的X射线束施加到物体;以及检测器，与X射线源相对设置，用于检测透射的X射线关于物体周围的数据，在施加X射线的同时在物体周围;重建装置，用于通过使用扫描仪获取包含两个或更多个不同能量的物体的透射的X射线数据来重建物体的断层图;以及显示装置，显示重建的断层图像; 所述X射线CT装置还包括输入装置，用于输入关于待识别对象的识别组织的信息和与所述断层图像从所述识别组织分离的单独组织;以及扫描条件确定装置，用于确定用于识别所述识别组织的扫描条件来自断层图像的识别组织。由此，可以确定多能X射线CT装置的最佳扫描条件。

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