-
公开(公告)号：US07750973B2
公开(公告)日：2010-07-06
申请号：US10485203
申请日：2002-11-11
CPC分类号： H04N7/01 , H04N5/765 , H04N5/772 , H04N5/9201 , H04N7/0112
摘要： A pickup 1 generates a video signal based on an arbitrarily set frame rate. A frame rate converter 2 converts a frame rate of the video signal output from the pickup 1 into a predetermined frame rate. Frame rate conversion information output units 6 and 4 output information on frame rate conversion in a manner corresponding to a video signal after the frame rate conversion.
摘要翻译： 拾取器1基于任意设置的帧速率产生视频信号。 帧速率转换器2将从拾取器1输出的视频信号的帧速率转换为预定的帧速率。 帧速率转换信息输出单元6和4以与帧速率转换之后的视频信号相对应的方式输出关于帧速率转换的信息。
-
公开(公告)号：US07418075B2
公开(公告)日：2008-08-26
申请号：US11331172
申请日：2006-01-13
申请人： Katsuyuki Taguchi
发明人： Katsuyuki Taguchi
IPC分类号： A61B6/00
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , G01N2223/419 , G01N2223/612
摘要： A computed tomography apparatus, including: an X-ray helical scanning device including an X-ray generator and an X-ray detector arranged in a gantry, the helical scanning device configured to provide a continuous scan and to obtain projection data of a scanned object arranged on a platform; and control unit configured to control at least one of the X-ray helical scanning device and the platform so as to generate the continuous scan with a helical pitch that is based on a height of a detector row of the X-ray detector projected onto an iso-center of the gantry.
摘要翻译： 一种计算机断层摄影装置，包括：X射线螺旋扫描装置，其包括布置在台架中的X射线发生器和X射线检测器，所述螺旋扫描装置被配置为提供连续扫描并获得扫描对象的投影数据 安排在平台上; 以及控制单元，被配置为控制所述X射线螺旋扫描装置和所述平台中的至少一个，以便以基于所述X射线检测器的检测器行的高度的螺旋间距产生所述连续扫描， 龙门架的等中心。
-
3.发明授权公开(公告)号：US07359478B2
公开(公告)日：2008-04-15
申请号：US10990464
申请日：2004-11-18
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/432 , Y10S378/901
摘要： A method, system, and computer program product for compensating for the unavailability of projection data of a scanned object at a selected point, the selected point located outside a detection range of a detector. The method include the steps of obtaining projection data of the scanned object, and compensating for the unavailability of the projection data at the selected point based on the obtained projection data and coordinates of the selected point relative to the detector. The compensating step includes determining at least one complementary projection angle and coordinates of at least one complementary point based on a source projection angle and the coordinates of the selected point relative to the detector, and estimating the projection data value at the selected point based on the acquired projection data, the at least one complementary projection angle, and the coordinates of the at least one complementary point.
摘要翻译： 一种方法，系统和计算机程序产品，用于补偿在选定点处扫描对象的投影数据的不可用性，该选定点位于检测器的检测范围之外。 该方法包括以下步骤：基于所获得的投影数据和相对于检测器的所选点的坐标来补偿所选择的投影数据的不可用性，从而获得扫描对象的投影数据。 补偿步骤包括基于源投影角度和所选点相对于检测器的坐标来确定至少一个互补点的至少一个互补投影角度和坐标，以及基于所选择的点估计所选点处的投影数据值 所获取的投影数据，所述至少一个互补投影角以及所述至少一个互补点的坐标。
-
公开(公告)号：US20060198491A1
公开(公告)日：2006-09-07
申请号：US11094468
申请日：2005-03-31
申请人： Katsuyuki Taguchi
发明人： Katsuyuki Taguchi
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/412
摘要： A method for reconstructing an image, including obtaining projection data using an X-ray detector and one of a cone-beam X-ray generator and a fan-beam X-ray generator; filtering the obtained projection data using a ramp-based filtering function to generate filtered projection data; weighting the filtered projection data to compensate for redundant projection data; and reconstructing the image by back-projecting the weighted projection data along a radial path.
摘要翻译： 一种用于重建图像的方法，包括使用X射线检测器和锥形束X射线发生器和扇形束X射线发生器之一获得投影数据; 使用基于斜坡的滤波函数对所获得的投影数据进行滤波，以生成滤波投影数据; 对经滤波的投影数据进行加权以补偿冗余投影数据; 以及通过沿径向路径反投影加权的投影数据来重建图像。
-
公开(公告)号：US20060067457A1
公开(公告)日：2006-03-30
申请号：US10951650
申请日：2004-09-29
CPC分类号： G06T11/005 , A61B6/027 , Y10S378/901
摘要： A method of determining an image data value at a point of reconstruction in a computed tomography (CT) image of a scanned object, including obtaining projection data of the scanned object, filtering the obtained projection data with a one-dimensional ramp filter to generate ramp-filtered data, and applying a backprojection operator with inverse distance weighting to the ramp-filtered data to generate the image data value at the point of reconstruction in the CT image.
摘要翻译： 一种确定扫描对象的计算机断层摄影（CT）图像中的重建点处的图像数据值的方法，包括获得扫描对象的投影数据，用一维斜坡滤波器对获得的投影数据进行滤波以产生斜坡 过滤的数据，以及将具有反距离加权的反投影算子应用于斜坡滤波数据，以在CT图像中的重构点生成图像数据值。
-
公开(公告)号：US06584166B2
公开(公告)日：2003-06-24
申请号：US10107408
申请日：2002-03-28
申请人： Katsuyuki Taguchi
发明人： Katsuyuki Taguchi
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4233 , G01N23/046 , G01N2223/419 , G06T11/005 , Y10S378/901
摘要： An X-ray computerized tomographic apparatus includes an X-ray tube device configured to irradiate an object to be examined with a pyramidal X-ray beam, a detector which has a plurality of detecting elements arrayed in a slice direction in which X-rays transmitted through the object are detected, a data extending unit which creates virtual data corresponding to an extension region located outside a region in which the detecting elements are arranged in the slice direction on the basis of real data detected by the detecting element, and a reconstructing unit which reconstructs image data on the basis of the real data and virtual data.
-
公开(公告)号：US5974108A
公开(公告)日：1999-10-26
申请号：US773324
申请日：1996-12-24
申请人： Katsuyuki Taguchi , Hiroshi Aradate
发明人： Katsuyuki Taguchi , Hiroshi Aradate
CPC分类号： G06T11/005 , A61B6/027 , Y10S378/901
摘要： An X-ray CT scanning apparatus comprises an X-ray source for irradiating a beam of X-ray to an object to be examined, a detector provided with at least two rows of detector elements for detecting the X-ray beam to have a real data, and a couch driver for traveling in an axial direction of the body of the object a couch on which the object is placed, in which the X-ray beam being irradiated from the X-ray source which is being rotated and simultaneously, the couch being traveled with the couch driver, the object is scanned in a helical direction so that the real data sampled by the detector is not identical in the sweep pattern to its opposite data. Two data located on both sides of the target slicing location may be selected from groups of the real data and their opposite data sampled by the detector and used to interpolate a data at the target slicing location. The group of the real data and their opposite data sampled by the detector may be filtered in the direction of slices to produce a desired data at the target slicing location. Also, a combination of the above three methods can be implemented.
摘要翻译： X射线CT扫描装置包括用于将X射线束照射到待检查对象的X射线源，设置有至少两行检测器元件的检测器，用于检测X射线束以具有真实的 数据和用于在物体的轴向方向上行进的沙发驱动器，其上放置有物体的沙发，其中X射线束从正在旋转的X射线源照射，同时， 沙发与沙发驾驶员一起旅行，物体沿螺旋方向扫描，使得检测器采样的实际数据在扫描模式与其相反的数据不相同。 位于目标切片位置两侧的两个数据可以从实际数据组和由检测器采样的相反数据的组中选择，并用于在目标切片位置内插数据。 可以在切片的方向上对由检测器采样的真实数据及其相反数据的组进行滤波，以在目标切片位置产生所需数据。 此外，可以实现上述三种方法的组合。
-
8.发明授权Method for helical windmill artifact reduction with noise restoration for helical multislice CT 失效螺旋式风车神经降低方法，用于螺旋多层CT的噪声恢复公开(公告)号：US07623691B2
公开(公告)日：2009-11-24
申请号：US10912183
申请日：2004-08-06
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , A61B6/027 , G06T5/003 , G06T5/50 , G06T2207/10081 , G06T2207/20221 , G06T2207/30004
摘要： A method of removing an imaging artifact in a medical image, including obtaining a first plurality of images, the first plurality of images collectively defining a first image volume; filtering the first plurality of images to create a second plurality of images, each image in the second plurality of images comprising an average of at least two images in the first plurality of images; selecting a first image from the first plurality of images; adding a lost noise image to a second image in the second plurality of images to create a noise restored image, the second image in the second plurality of images corresponding to the first image in the first plurality of images; determining a gradient image based on pixel values in the second plurality of images, the gradient image comprising a gradient value at each pixel location in the second image; and combining, based on the determined gradient image, the first image and the noise restored image to obtain a corrected image that does not contain the imaging artifact.
摘要翻译： 一种去除医学图像中的成像伪影的方法，包括获得第一多个图像，所述第一多个图像共同限定第一图像体积; 过滤所述第一多个图像以创建第二多个图像，所述第二多个图像中的每个图像包括所述第一多个图像中的至少两个图像的平均值; 从所述第一多个图像中选择第一图像; 在所述第二多个图像中将丢失的噪声图像添加到第二图像以创建噪声恢复图像，所述第二多个图像中的所述第二图像对应于所述第一多个图像中的所述第一图像; 基于所述第二多个图像中的像素值确定梯度图像，所述梯度图像包括在所述第二图像中的每个像素位置处的梯度值; 并且基于所确定的梯度图像合并第一图像和噪声恢复图像，以获得不包含成像伪像的校正图像。
-
公开(公告)号：US20070165774A1
公开(公告)日：2007-07-19
申请号：US11331172
申请日：2006-01-13
申请人： Katsuyuki Taguchi
发明人： Katsuyuki Taguchi
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , G01N2223/419 , G01N2223/612
摘要： A computed tomography apparatus, including: an X-ray helical scanning device including an X-ray generator and an X-ray detector arranged in a gantry, the helical scanning device configured to provide a continuous scan and to obtain projection data of a scanned object arranged on a platform; and control unit configured to control at least one of the X-ray helical scanning device and the platform so as to generate the continuous scan with a helical pitch that is based on a height of a detector row of the X-ray detector projected onto an iso-center of the gantry.
摘要翻译： 一种计算机断层摄影装置，包括：X射线螺旋扫描装置，其包括布置在台架中的X射线发生器和X射线检测器，所述螺旋扫描装置被配置为提供连续扫描并获得扫描对象的投影数据 安排在平台上; 以及控制单元，被配置为控制所述X射线螺旋扫描装置和所述平台中的至少一个，以便以基于所述X射线检测器的检测器行的高度的螺旋间距产生所述连续扫描， 龙门架的等中心。
-
10.发明授权公开(公告)号：US06907100B2
公开(公告)日：2005-06-14
申请号：US10278872
申请日：2002-10-24
申请人： Katsuyuki Taguchi
发明人： Katsuyuki Taguchi
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4085 , A61B6/5264 , G06T11/005 , G06T2211/412 , Y10S378/901
摘要： An X-ray CT system is equipped with a gantry, couch and control cabinet and configured to scan a cone-beam X-ray toward an object along a given orbit to acquire cone-beam data in which a three-dimensional distribution of an X-ray absorption coefficient within the object is reflected. The control cabinet decides a degree of reliability for the cone-beam data according to an acquisition time of the cone-beam data, and then decides a weight for three-dimensional Radon data from the cone-beam data on the basis of the degree of reliability. Using this weight, the control cabinet reconstructs the three-dimensional Radon data based on a three-dimensional reconstruction algorithm. Thus, when the three-dimensional reconstruction algorithm for cone-beam CT is applied to medical CT, artifacts attributable to object's motion can be suppressed and temporal resolution can be improved.
摘要翻译： X射线CT系统配备有龙门架，沙发和控制柜，并被配置为沿着给定的轨道朝向物体扫描锥形束X射线，以获取锥形束数据，其中X的三维分布 反映了物体内的吸收系数。 控制柜根据锥形束数据的获取时间决定锥形束数据的可靠度，然后根据锥形束数据的度数决定来自锥形束数据的三维Radon数据的权重 可靠性。 使用该重量，控制柜基于三维重建算法重建三维Radon数据。 因此，当用于锥形CT的三维重建算法应用于医学CT时，可以抑制归因于对象运动的伪像，并且可以提高时间分辨率。
-
-
-
-
-
-
-
-
-
搜索结果
36 条记录 (耗时 0.025 秒)
