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公开(公告)号：US07869560B2
公开(公告)日：2011-01-11
申请号：US12268334
申请日：2008-11-10
申请人： Yasuhiro Imai
发明人： Yasuhiro Imai
IPC分类号： A61B6/00
摘要： An X-ray CT apparatus includes an X-ray radiation unit which applies a first X-ray having a first energy spectrum and a second X-ray having a second energy spectrum different from the first energy spectrum to a subject, an X-ray data acquisition unit which acquires first X-ray projection data of the subject based on the first X-ray and second X-ray projection data of the subject based on the second X-ray, and an image reconstruction unit which determines information about a difference between the first X-ray and the second X-ray with respect to an image of the subject, segments the image into at least two pixel areas based on the difference information, and sets part of the segmented pixel areas to a dual energy image obtained by a weighted subtraction process based on X-ray projection data having a plurality of energy spectrums.
摘要翻译： X射线CT装置包括X射线辐射单元，其将具有第一能谱的第一X射线和具有与第一能谱不同的第二能谱的第二X射线施加到被摄体，X射线 数据获取单元，其基于第二X射线基于被摄体的第一X射线投影数据和第二X射线投影数据获取被摄体的第一X射线投影数据;以及图像重建单元，其确定关于差异的信息 在相对于被摄体的图像的第一X射线和第二X射线之间，基于差异信息将图像分割成至少两个像素区域，并且将部分分割的像素区域设置为获得的双能量图像 通过基于具有多个能谱的X射线投影数据的加权减法处理。
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公开(公告)号：US07825370B2
公开(公告)日：2010-11-02
申请号：US11159706
申请日：2005-06-23
申请人： Abdelaziz Ikhlef , Yasuhiro Imai
发明人： Abdelaziz Ikhlef , Yasuhiro Imai
IPC分类号： G12B13/00
CPC分类号： G01T1/2985 , G01T1/2018 , G01T7/005
摘要： Methods and systems for calibrating a Computed Tomography (CT) system are provided. The method includes selectively activating each of a plurality of elements of a detector in the CT system. The method further includes determining for each of the selectively activated elements, a crosstalk effect on elements adjacent to the activated elements, to calibrate the CT system.
摘要翻译： 提供了用于校准计算机断层扫描（CT）系统的方法和系统。 该方法包括选择性地激活CT系统中的检测器的多个元件中的每一个。 该方法还包括为每个选择性激活的元件确定与激活的元件相邻的元件的串扰效应，以校准CT系统。
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公开(公告)号：US07522696B2
公开(公告)日：2009-04-21
申请号：US11620627
申请日：2007-01-05
申请人： Yasuhiro Imai
发明人： Yasuhiro Imai
IPC分类号： G01N23/083 , H05G1/62
CPC分类号： A61B6/032 , A61B5/0452 , A61B5/7207 , A61B6/027 , A61B6/481 , A61B6/503 , A61B6/504 , A61B6/541 , G01N23/046 , G01N2223/419
摘要： An X-ray CT apparatus includes an X-ray data acquisition device for acquiring X-ray projection data transmitted through a subject lying between an X-ray generator and an X-ray detector having a two-dimensional detection plane and detecting X rays in opposition to the X-ray generator, while the X-ray generator and the X-ray detector are being rotated about a center of rotation lying there between; an image reconstructing device for image-reconstructing the acquired projection data; an image display device for displaying the image-reconstructed tomographic image; and an imaging condition setting device for setting various kinds of imaging conditions for tomographic image, wherein the X-ray data acquisition device acquires X-ray projection data in sync with an external sync signal by a helical scan with a predetermined range of the subject with a helical pitch set to 1 or more.
摘要翻译： X射线CT装置包括X射线数据获取装置，用于获取通过X射线发生器和具有二维检测平面的X射线检测器之间的被摄体发送的X射线投影数据，并且检测X射线 与X射线发生器相对，而X射线发生器和X射线检测器围绕位于其间的旋转中心旋转; 用于对所获取的投影数据进行图像重建的图像重建装置; 用于显示图像重构的断层图像的图像显示装置; 以及用于设置断层图像的各种成像条件的成像条件设置装置，其中所述X射线数据获取装置通过具有所述对象的预定范围的螺旋扫描与外部同步信号同步地获取X射线投影数据， 螺距设定为1以上。
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公开(公告)号：US07486334B2
公开(公告)日：2009-02-03
申请号：US10897204
申请日：2004-07-23
申请人： Kouzou Masuda , Ikuya Arai , Sadao Tsuruga , Jiro Kawasaki , Tsuyoshi Sano , Tamotsu Nagabayashi , Ryuuichi Someya , Fumio Inoue , Kouji Kitou , Yasuhiro Imai , Masatoshi Hirose
发明人： Kouzou Masuda , Ikuya Arai , Sadao Tsuruga , Jiro Kawasaki , Tsuyoshi Sano , Tamotsu Nagabayashi , Ryuuichi Someya , Fumio Inoue , Kouji Kitou , Yasuhiro Imai , Masatoshi Hirose
IPC分类号： H04N5/445
CPC分类号： H04N5/126 , H04N5/44591 , H04N5/45 , H04N5/52 , H04N5/57 , H04N7/012 , H04N21/4113 , H04N21/4305 , H04N21/4316 , H04N21/4318 , H04N21/440218
摘要： An image display system includes a display device, an input section to which video signals of an interlace scanning system are inputted, a signal converter section which increases horizontal scanning lines of the inputted video signals in number by a factor of at least two, and which generates first and second fields, each of the fields including effective scanning lines used for displaying and ineffective scanning lines not used for displaying, with the effective and ineffective scanning lines being arranged alternately in each of the fields, and a display control section which controls the display device to display the first and second fields alternately. The display control section controls the display device such that positions of the effective scanning lines of the first fields correspond with those of the ineffective scanning lines of the second fields, and vice versa.
摘要翻译： 图像显示系统包括：显示装置，输入交错扫描系统的视频信号的输入部分;信号转换部，其将所输入的视频信号的水平扫描线数量增加至少2倍;以及哪个 产生第一和第二场，每个场包括用于显示的有效扫描线和不用于显示的无效扫描线，其中有效和无效扫描线交替地布置在每个场中;以及显示控制部分，其控制 显示装置交替地显示第一和第二场。 显示控制部控制显示装置，使得第一场的有效扫描线的位置与第二场无效扫描线的位置相对应，反之亦然。
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公开(公告)号：US20090022263A1
公开(公告)日：2009-01-22
申请号：US12173748
申请日：2008-07-15
申请人： Yasuhiro Imai
发明人： Yasuhiro Imai
IPC分类号： A61B6/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4085 , A61B6/482
摘要： The present invention provides an X-ray CT apparatus for imaging an MD image having a better S/N. The X-ray CT apparatus for taking an image with one of two materials within a subject to be examined being fractionated, acquiring two sets of data corresponding to said two types of X-ray having different energy by scanning using said two types of X-ray, generating a first image based on the two sets of data with the pixel values made by weighted addition of two types of CT values corresponding to the two types of X-ray, generating a second image based on the two sets of data, wherein the other one of the two types of material being fractionated, and generating an image by weighted subtraction of the first image and the second image.
摘要翻译： 本发明提供一种用于对具有更好S / N的MD图像进行成像的X射线CT装置。 用于拍摄被检体内的两种材料中的一种的图像的X射线CT装置被分割，通过使用所述两种X射线扫描来扫描，获得与具有不同能量的所述两种类型的X射线相对应的两组数据， 基于具有通过对应于两种类型的X射线的两种类型的CT值的加权相加而进行的像素值的两组数据生成第一图像，基于两组数据生成第二图像，其中 两种类型的材料中的另一种被分级，并且通过加权减去第一图像和第二图像来生成图像。
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公开(公告)号：US07313216B2
公开(公告)日：2007-12-25
申请号：US11199416
申请日：2005-08-08
IPC分类号： A61B6/03
CPC分类号： A61B6/481 , A61B6/027 , A61B6/032 , A61B6/507 , G01N23/046 , G01N2223/419 , G01N2223/612 , G06T11/005
摘要： A scan control method for an X-ray CT apparatus wherein a subject with a contrast agent injected therein is helically scanned with an X-ray beam and image reconstruction is performed based on projection data obtained through an X-ray detector. The method includes controlling a velocity of a helical scan following motion of the contrast agent in the subject.
摘要翻译： 一种X射线CT装置的扫描控制方法，其中用X射线束对其中注射有造影剂的对象进行螺旋扫描，并且基于通过X射线检测器获得的投影数据进行图像重建。 该方法包括控制受试者中造影剂的运动之后的螺旋扫描的速度。
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公开(公告)号：US07263158B2
公开(公告)日：2007-08-28
申请号：US11431036
申请日：2006-05-09
IPC分类号： G01N23/08
CPC分类号： A61B6/032 , A61B6/027 , G01N2223/03 , G01N2223/204 , G01N2223/501 , G01T1/2985
摘要： With the object of realizing an X-ray CT apparatus which performs a plurality of pieces of imaging small in resolution degradation too simultaneously while suppressing an expansion of a data acquisition section that receives an electric signal of an X-ray detector, such an array that X-ray detectors in a channel direction are operated with the two as one pair is made by first detector switching means of a switching unit. This array moved by one X-ray detector in the channel direction is alternately repeated in the row or channel direction. Therefore, even when the number of receivers is small, data extending over a wide imaging range can simultaneously be collected while the degradation of resolution is being suppressed to a minor degree. By extension, imaging more coincident with an operator-aimed image can be done by making the switching use of imaging in high resolution.
摘要翻译： 为了实现在同时抑制接收X射线检测器的电信号的数据采集部的扩展的同时执行分辨率降低的多个成像的X射线CT装置，其目的在于， X射线检测器在通道方向上操作，两者一对由切换单元的第一检测器切换装置制成。 通过一个X射线检测器在通道方向移动的该阵列在行或通道方向上交替重复。 因此，即使当接收机的数量少时，也可以同时收集在宽的成像范围内延伸的数据，同时在较小程度上抑制分辨率的降低。 通过扩展，可以通过以高分辨率开关成像来实现与操作者目标图像更相符的成像。
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公开(公告)号：US20070053480A1
公开(公告)日：2007-03-08
申请号：US11507763
申请日：2006-08-22
申请人： Akihiko Nishide , Tetsuya Horiuchi , Yasuhiro Imai
发明人： Akihiko Nishide , Tetsuya Horiuchi , Yasuhiro Imai
CPC分类号： A61B6/00 , A61B6/027 , A61B6/032 , A61B6/542 , A61B6/583 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： This invention provides an X-ray CT capable of presenting information of exposure to the operator by displaying X-ray dose information of each of regions of interest to be scanned by an X-ray CT apparatus, thereby encouraging reduction in exposure and optimization. X-ray dose information of each region to be scanned by a conventional scan (axial scan), a cine scan, a helical scan, or a variable-pitch helical scan of an X-ray CT apparatus is displayed so that the operator can recognize the X-ray dose information before acquisition of an image of a subject. The X-ray dose information can be predicated with higher precision and displayed by using a dose prediction value obtained by an interpolation value and an extrapolation value of the first or higher order on at least three or more kinds of phantom measurement values, not a simple prediction value such as a zero-th order interpolation value or a zero-th order extrapolation value obtained by using measurement values of two kinds of phantoms like in the present CTDI display.
摘要翻译： 本发明提供一种能够通过显示由X射线CT装置扫描的每个感兴趣区域的X射线剂量信息来呈现对操作者的曝光信息的X射线CT，由此有助于减少曝光和优化。 通过X射线CT装置的常规扫描（轴向扫描），电影扫描，螺旋扫描或可变间距螺旋扫描来显示要扫描的每个区域的X射线剂量信息，使得操作者可以识别 在获取对象的图像之前的X射线剂量信息。 X射线剂量信息可以更精确地预测并且通过使用通过内插值获得的剂量预测值和在至少三种或更多种幻影测量值上的第一或更高阶的外推值来显示，而不是简单的 例如通过使用如本CTDI显示中的两种类型的幻影的测量值而获得的零级内插值或零级外插值等预测值。
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公开(公告)号：US20060256922A1
公开(公告)日：2006-11-16
申请号：US11431036
申请日：2006-05-09
CPC分类号： A61B6/032 , A61B6/027 , G01N2223/03 , G01N2223/204 , G01N2223/501 , G01T1/2985
摘要： With the object of realizing an X-ray CT apparatus which performs a plurality of pieces of imaging small in resolution degradation too simultaneously while suppressing an expansion of a data acquisition section that receives an electric signal of an X-ray detector, such an array that X-ray detectors in a channel direction are operated with the two as one pair is made by first detector switching means of a switching unit. This array moved by one X-ray detector in the channel direction is alternately repeated in the row or channel direction. Therefore, even when the number of receivers is small, data extending over a wide imaging range can simultaneously be collected while the degradation of resolution is being suppressed to a minor degree. By extension, imaging more coincident with an operator-aimed image can be done by making the switching use of imaging in high resolution.
摘要翻译： 为了实现在同时抑制接收X射线检测器的电信号的数据采集部的扩展的同时执行分辨率降低的多个成像的X射线CT装置，其目的在于， X射线检测器在通道方向上操作，两者一对由切换单元的第一检测器切换装置制成。 通过一个X射线检测器在通道方向移动的该阵列在行或通道方向上交替重复。 因此，即使当接收机的数量少时，也可以同时收集在宽的成像范围内延伸的数据，同时在较小程度上抑制分辨率的降低。 通过扩展，可以通过以高分辨率开关成像来实现与操作者目标图像更相符的成像。
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公开(公告)号：US20060114350A1
公开(公告)日：2006-06-01
申请号：US11262931
申请日：2005-11-01
申请人： Takao Shimada , Tomohisa Kohiyama , Takahiro Yamada , Shin-ichi Hashimoto , Yuji Kimura , Takeo Tomokane , Itaru Nonomura , Kazuaki Tanaka , Yasunobu Hori , Yuuichi Ikeya , Yasuhiro Imai
发明人： Takao Shimada , Tomohisa Kohiyama , Takahiro Yamada , Shin-ichi Hashimoto , Yuji Kimura , Takeo Tomokane , Itaru Nonomura , Kazuaki Tanaka , Yasunobu Hori , Yuuichi Ikeya , Yasuhiro Imai
IPC分类号： H04N11/02
CPC分类号： H04N21/2356 , H04N7/17336 , H04N19/40 , H04N19/61 , H04N21/222 , H04N21/23106 , H04N21/234363 , H04N21/2368 , H04N21/25833 , H04N21/2662 , H04N21/4312 , H04N21/4314 , H04N21/4341 , H04N21/6125 , H04N21/6373 , H04N21/6377 , H04N21/658 , H04N21/8543
摘要： A data converting device which includes an input device which receives input information containing one or more kinds of data, a data analyzer which checks each kind of data constituting the input information and extracts data from the input information when the checked data are judged to be predetermined conversion target data to be subjected to a data conversion processing, and a controller which performs the conversion processing on an amount of the extracted data in accordance with a predetermined regulation for the kind of data. The invention further includes an information constructing device which replaces the non-converted data of the input information which converted extracted data, thereby reconstructing the input information, and an output device which outputs the reconstructed input information.
摘要翻译： 一种数据转换装置，包括接收包含一种或多种数据的输入信息的输入装置，数据分析器，当检查数据被判断为预定时，检查构成输入信息的各种数据并从输入信息中提取数据 要进行数据转换处理的转换目标数据，以及根据关于数据类型的预定规定对所提取的数据量执行转换处理的控制器。 本发明还包括一个信息构成装置，其替换转换的提取数据，从而重建输入信息的输入信息的未转换数据和输出重构的输入信息的输出装置。
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