公开(公告)号：US07551721B2

公开(公告)日：2009-06-23

申请号：US11676885

申请日：2007-02-20

申请人： Takeshi Nakaura ,  Satoru Ohishi

发明人： Takeshi Nakaura ,  Satoru Ohishi

IPC分类号： A61B6/00

CPC分类号： A61B6/504 ,  A61B5/7289 ,  A61B6/5264 ,  A61B6/541 ,  A61B8/00 ,  A61B8/5276 ,  G06T5/50 ,  G06T7/0016 ,  G06T7/20 ,  G06T2207/10116 ,  G06T2207/20224 ,  G06T2207/30101 ,  H04N5/3205

摘要： An X-ray diagnostic apparatus includes an image generating unit which generates a plurality of X-ray images by repeatedly radiographing a subject before and after injection of a contrast medium, a region detecting unit which detects a non-contrast region from a plurality of mask images before injection of the contrast medium and a plurality of contrast images after injection of the contrast medium, which constitute the plurality of X-ray images, a mask selecting unit which separately selects one mask image with respect to each of the contrast images on the basis of a correlation between the contrast image and the mask image upon localization to the non-contrast region, and a subtraction processing unit which generates a subtraction image by performing subtraction between the contrast image and the selected mask image.

摘要翻译： 一种X射线诊断装置包括：图像生成单元，其通过在注射造影剂之前和之后反复放射对象来生成多个X射线图像;区域检测单元，其从多个掩模检测非对比度区域 在注射造影剂之前的图像和在注入构成多个X射线图像的造影剂之后的多个对比度图像;掩模选择单元，其针对每个对比图像分别选择一个掩模图像 在对比度区域定位时对比度图像和掩模图像之间的相关性的基础;以及减法处理单元，其通过在对比度图像和所选择的掩模图像之间进行减法来生成减法图像。

公开(公告)号：US20070195932A1

公开(公告)日：2007-08-23

申请号：US11676885

申请日：2007-02-20

申请人： Takeshi NAKAURA ,  Satoru Ohishi

发明人： Takeshi NAKAURA ,  Satoru Ohishi

IPC分类号： H05G1/64

CPC分类号： A61B6/504 ,  A61B5/7289 ,  A61B6/5264 ,  A61B6/541 ,  A61B8/00 ,  A61B8/5276 ,  G06T5/50 ,  G06T7/0016 ,  G06T7/20 ,  G06T2207/10116 ,  G06T2207/20224 ,  G06T2207/30101 ,  H04N5/3205

摘要： An X-ray diagnostic apparatus includes an image generating unit which generates a plurality of X-ray images by repeatedly radiographing a subject before and after injection of a contrast medium, a region detecting unit which detects a non-contrast region from a plurality of mask images before injection of the contrast medium and a plurality of contrast images after injection of the contrast medium, which constitute the plurality of X-ray images, a mask selecting unit which separately selects one mask image with respect to each of the contrast images on the basis of a correlation between the contrast image and the mask image upon localization to the non-contrast region, and a subtraction processing unit which generates a subtraction image by performing subtraction between the contrast image and the selected mask image.

摘要翻译： 一种X射线诊断装置包括：图像生成单元，其通过在注射造影剂之前和之后反复放射对象来生成多个X射线图像;区域检测单元，其从多个掩模检测非对比度区域 在注射造影剂之前的图像和在注入构成多个X射线图像的造影剂之后的多个对比度图像;掩模选择单元，其针对每个对比图像分别选择一个掩模图像 在对比度区域定位时对比度图像和掩模图像之间的相关性的基础;以及减法处理单元，其通过在对比度图像和所选择的掩模图像之间进行减法来生成减法图像。

公开(公告)号：US08929633B2

公开(公告)日：2015-01-06

申请号：US12752518

申请日：2010-04-01

申请人： Satoru Ohishi

发明人： Satoru Ohishi

IPC分类号： G06K9/00 ,  A61B6/00 ,  A61B6/03

CPC分类号： A61B6/504 ,  A61B6/032 ,  A61B6/4441 ,  A61B6/466 ,  A61B6/481 ,  A61B6/503 ,  A61B6/507 ,  A61B6/5235 ,  A61B6/541

摘要： A diagnostic x-ray system includes a CT-image projection unit obtains a third perfusive-flow image by projecting a second perfusive-flow image obtained by computed tomography in the same direction as a projection direction in which an X-ray is projected toward a test subject to obtain a first perfusive-flow image. A positioning unit obtains positioning information by performing positioning of the first perfusive-flow image and the third perfusive-flow image. A perfusive-flow index calculation unit calculates a first perfusive-flow index from the first perfusive-flow image, and calculates a second perfusive-flow index from the third perfusive-flow image. A comparative-index calculation unit calculates a comparative index based on the first perfusive-flow index and the second perfusive-flow index, by comparing the first perfusive-flow index with the second perfusive-flow index, based on the positioning information obtained by the positioning unit.

摘要翻译： 诊断X射线系统包括CT图像投影单元，通过将计算机断层摄影获得的第二灌注流图像投影到与向X射线投影的X射线的投影方向相同的方向上获得第三灌注流图像 测试受试者获得第一个灌注流图像。 定位单元通过执行第一灌注流图像和第三灌注流图像的定位来获得定位信息。 灌注流指数计算单元从第一灌注流图像计算第一灌注流指数，并从第三灌注流图像计算第二灌注流指数。 比较指标计算单元基于第一灌注流指数和第二灌注流指数，通过将第一灌注流指数与第二灌注流指数进行比较，基于由第一灌注流指数 定位单元

公开(公告)号：US20100208969A1

公开(公告)日：2010-08-19

申请号：US12388788

申请日：2009-02-19

申请人： Satoru Ohishi ,  Clay Christopher Smith

发明人： Satoru Ohishi ,  Clay Christopher Smith

IPC分类号： G06K9/00 ,  G06K9/40

CPC分类号： A61B6/032 ,  A61B6/4441 ,  A61B6/5258 ,  A61B6/5264 ,  G06T5/003 ,  G06T7/73 ,  G06T2207/10081 ,  G06T2207/20201 ,  G06T2207/30004

摘要： The influences of the vibrations and the like of a rotational radiography system are corrected with respect to a projection image for each projection direction which contains an artificial artifact, and volume data containing only a ring artifact is generated by image reconstruction using the projection images. A ring center is determined by using this volume data, and polar coordinate conversion of an actual radiographed image is executed by using the ring center as an origin, thereby extracting a signal (ring artifact) parallel to an angular axis.

摘要翻译： 相对于包含人造假象的每个投射方向的投影图像校正旋转射线照相系统的振动等的影响，并且通过使用投影图像的图像重建来生成仅包含环形伪影的体数据。 通过使用该体数据确定环中心，并且通过使用环中心作为原点来执行实际拍摄图像的极坐标转换，从而提取与角轴平行的信号（环形伪像）。

公开(公告)号：US20100208870A1

公开(公告)日：2010-08-19

申请号：US12388947

申请日：2009-02-19

申请人： Yu Zou ,  Michael D. Silver ,  Satoru Ohishi ,  Kozo Sato

发明人： Yu Zou ,  Michael D. Silver ,  Satoru Ohishi ,  Kozo Sato

IPC分类号： G01N23/201 ,  G06K9/00

CPC分类号： A61B6/032 ,  A61B6/5282 ,  G06T5/003 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/20224 ,  G06T2207/30004

摘要： Scattered radiation is estimated by using a reduced image generated from a projection image, and the scattered radiation image of the projection image is acquired by enlargement processing. The scattered radiation correction of the projection image is executed by subtracting the obtained scattered radiation image from the projection image. In addition, when a primary X-ray image and a scattered radiation image in each projection direction are to be obtained by sequential approximation calculation, a primary X-ray image which has already been identified in an adjacent projection direction is used as a first estimated value (initially set value) in next sequential calculation.

摘要翻译： 通过使用从投影图像生成的缩小图像来估计散射辐射，并且通过放大处理获取投影图像的散射辐射图像。 通过从投影图像中减去所获得的散射辐射图像来执行投影图像的散射辐射校正。 此外，当通过顺序近似计算要获得每个投影方向上的主X射线图像和散射辐射图像时，将已经在相邻投影方向上识别的主X射线图像用作第一估计 值（初始设定值）。

公开(公告)号：US07269246B2

公开(公告)日：2007-09-11

申请号：US11558157

申请日：2006-11-09

申请人： Satoru Ohishi

发明人： Satoru Ohishi

IPC分类号： H05G1/64

CPC分类号： A61B6/504 ,  A61B6/4441 ,  A61B6/481

摘要： An X-ray angiography apparatus includes a C-arm, a support mechanism which rotatably supports the C-arm, a rotation driving unit which drives rotation of the C-arm, an X-ray tube mounted on the C-arm, an X-ray detector mounted on the C-arm in a direction to face the X-ray tube, and a rotation control unit which controls the X-ray detector and the rotation driving unit to make the angle sampling pitch of contrast images become larger than that of mask images.

摘要翻译： X射线血管造影装置包括C形臂，可旋转地支撑C形臂的支撑机构，驱动C形臂的旋转的旋转驱动单元，安装在C形臂上的X射线管，X 射线检测器，以与X射线管相对的方向安装在C臂上;以及旋转控制单元，其控制X射线检测器和旋转驱动单元，使得对比度图像的角度采样间距变得比 的面膜图像。

公开(公告)号：US06990229B2

公开(公告)日：2006-01-24

申请号：US10421926

申请日：2003-04-24

申请人： Satoru Ohishi

发明人： Satoru Ohishi

IPC分类号： G06K9/36

CPC分类号： G06T19/00 ,  A61B5/055 ,  A61B6/032 ,  A61B6/5235 ,  A61B6/5247 ,  A61B8/00 ,  A61B8/5238 ,  G06F19/00 ,  G06T2219/028 ,  G06T2219/2004 ,  G06T2219/2016

摘要： A CT device, an MRI device, an ultrasonic device, or an X-ray device for picturing a 3-D image are connected to a network. A 3-D image is stored in an image database via the network. A first image processing device or a second image processing device obtains a 3-D image from the respective devices via the network. The image processing device can display a plurality of 3-D images concurrently with conditions made uniform with regard to direction of observation, enlargement ratio, scale, etc. Also, the device can display a combined image obtained by combining a plurality of 3-D images. The combined image can be displayed so that overlapping areas and non-overlapping areas are in different colors. In addition, the device can display medical information of use for a diagnosis or an examination together with the plurality of 3-D images displayed with conditions made uniform.

公开(公告)号：US20050286679A1

公开(公告)日：2005-12-29

申请号：US11165463

申请日：2005-06-24

申请人： Takuya Sakaguchi ,  Satoru Ohishi

发明人： Takuya Sakaguchi ,  Satoru Ohishi

IPC分类号： A61B6/00 ,  A61B6/03

CPC分类号： A61B6/032 ,  A61B6/4014 ,  A61B6/4021 ,  A61B6/4441 ,  A61B6/541

摘要： Projection data are obtained by using a method for imaging by rotating the first imaging system having an X-ray generating unit 1a and the second imaging system having an X-ray generating unit 1b. The obtained projection data are subjected to a reconstruction process to generate X-ray image data. In this case, a relative angle η0 formed between the imaging systems is setup according to a palmic period T0 of a subject and a rotation velocity Vr of the imaging systems. Thus, the projection data from more directions at a predetermined palmic time-phase are collected without overlapping.

摘要翻译： 通过旋转具有X射线产生单元1a的第一成像系统和具有X射线产生单元1b的第二成像系统，通过使用用于成像的方法来获得投影数据。 对获得的投影数据进行重构处理，生成X射线图像数据。 在这种情况下，根据被摄体的时间周期T 0和成像系统的旋转速度Vr来建立在成像系统之间形成的相对角度θ0。 因此，在不重叠的情况下收集在预定的时间相位上来自更多方向的投影数据。

公开(公告)号：US09042627B2

公开(公告)日：2015-05-26

申请号：US13599182

申请日：2012-08-30

申请人： Satoru Ohishi ,  Yu-Bing Chang

发明人： Satoru Ohishi ,  Yu-Bing Chang

IPC分类号： G06T7/00 ,  A61B6/12 ,  A61F2/06 ,  G06K9/00 ,  A61B6/03 ,  A61F2/82

CPC分类号： A61F2/06 ,  A61B6/03 ,  A61B6/12 ,  A61F2/82 ,  A61F2250/0098 ,  G06K9/00

摘要： According to one embodiment, an X-ray diagnostic apparatus includes a data acquiring unit and a data processing unit. The data acquiring unit acquires X-ray projection data corresponding to plural directions from an object in which a stent having markers has been inserted by exposing X-rays to the object from the plural directions. The data processing unit obtains a spatial position corresponding to at least one marker out of the markers based on first three dimensional image data generated by first image reconstruction processing of the X-ray projection data to generate second three dimensional image data by second image reconstruction processing of the X-ray projection data with a correction using a shift amount obtained based on the X-ray projection data and projected data of the one marker on a projected plane of the X-ray projection data.

摘要翻译： 根据一个实施例，X射线诊断装置包括数据获取单元和数据处理单元。 数据获取单元通过从多个方向向对象曝光X射线，从具有标记的支架的物体中获取与多个方向对应的X射线投影数据。 数据处理单元基于通过X射线投影数据的第一图像重建处理产生的第一三维图像数据，从标记中获取与至少一个标记相对应的空间位置，以通过第二图像重建处理生成第二三维图像数据 使用基于X射线投影数据获得的移位量和X射线投影数据的投影平面上的一个标记的投影数据进行校正的X射线投影数据。

公开(公告)号：US08542902B2

公开(公告)日：2013-09-24

申请号：US12911906

申请日：2010-10-26

申请人： Satoru Ohishi

发明人： Satoru Ohishi

IPC分类号： G06K9/00

CPC分类号： A61B6/504 ,  A61B5/0002 ,  A61B5/055 ,  A61B6/463 ,  A61B6/466 ,  A61B6/481 ,  A61B6/5235 ,  A61B6/563 ,  G06T7/32 ,  G06T11/006 ,  G06T19/003 ,  G06T2207/10072 ,  G06T2207/10121 ,  G06T2207/30101 ,  G06T2211/404

摘要： In an X-ray imaging apparatus according to an embodiment, a three-dimensional blood-vessel image collecting unit collects a three-dimensional blood vessel image. An X-ray image collecting unit collects an X-ray image. A composite-image creating unit then creates a three-dimensional projection image projected based on a state of the X-ray imaging apparatus from the collected three-dimensional blood vessel image, and creates a composite image of the created three-dimensional projection image and the X-ray image. A displacement determining unit then determines a displacement between an aneurysm on the three-dimensional projection image and the aneurysm on the X-ray image. Subsequently, a registration unit registers the composite image by using the determined displacement, and displays the registered composite image onto a display unit.

摘要翻译： 在根据实施例的X射线成像装置中，三维血管图像收集单元收集三维血管图像。 X射线图像采集单元收集X射线图像。 然后，复合图像生成单元根据所收集的三维血管图像，根据X射线成像装置的状态生成投影的三维投影图像，生成所生成的三维投影图像和 X射线图像。 然后，位移确定单元确定三维投影图像上的动脉瘤与X射线图像上的动脉瘤之间的位移。 随后，注册单元通过使用确定的位移登记合成图像，并将注册的合成图像显示在显示单元上。