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1. 发明申请

WO2010037911A1 METHOD AND DEVICE FOR PERFORMING COMPUTED TOMOGRAPHY X-RAY IMAGING 审中-公开
标题翻译：用于执行计算机图像X射线成像的方法和装置
公开(公告)号：WO2010037911A1
公开(公告)日：2010-04-08
申请号：PCT/FI2009/050796
申请日：2009-10-02
申请人： PALODEX GROUP OY , SIREN, Juuso , JOUHIKAINEN, Petri , SUURONEN, Esa , SETÄLÄ, Henri , KALKE, Martti
发明人： SIREN, Juuso , JOUHIKAINEN, Petri , SUURONEN, Esa , SETÄLÄ, Henri , KALKE, Martti
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/0478 , A61B6/06 , A61B6/14 , A61B6/405 , A61B6/4435 , A61B6/4452
摘要： A method, device and software for performing tomographic imaging with several offset values in such a way that: - the first imaging phase is performed by scanning at least a part of the object to be imaged by following the first arc of the first rotating movement to produce the first image information, - the offset of the imaging is changed between imaging phases during imaging, - at least one other imaging phase is performed with at least one changed offset to produce second image information of at least part of the object, - the said image information produced by different offsets is combined into three-dimensional image information.
摘要翻译：一种用于以下述方式执行具有多个偏移值的断层摄影成像的方法，装置和软件： - 第一成像阶段通过将第一旋转运动的第一弧追随到待成像对象的至少一部分进行扫描来执行，产生第一图像信息， - 在成像期间在成像相位之间改变成像的偏移， - 至少一个其它成像阶段用至少一个改变的偏移进行，以产生至少部分对象的第二图像信息， - 由不同偏移量产生的所述图像信息被组合成三维图像信息。

2. 发明申请

WO2008071835A1 X-RAY IMAGING UNIT AND METHOD FOR IMAGING THE JAWBONE REGION 审中-公开
标题翻译： X射线成像单元和用于成像JAWBONE区域的方法
公开(公告)号：WO2008071835A1
公开(公告)日：2008-06-19
申请号：PCT/FI2007/050646
申请日：2007-11-29
申请人： PALODEX GROUP OY , SETÄLÄ, Henri
发明人： SETÄLÄ, Henri
IPC分类号： A61B6/03 , A61B6/14
CPC分类号： A61B6/14 , A61B6/032 , G06T11/003 , G06T2211/436
摘要： The invention relates to an X-ray imaging unit and method for imaging the jawbone region for providing slice images of the region of interest. The unit includes a carrier element which comprises an X-ray source (20) disposed on one side of the object and a receiving means (21) disposed on the side of the object opposite from the X- ray source for receiving the radiation transmitted through the object for providing projection images. The carrier element is adapted to rotate around its rotation axis such that the X-ray source and the receiving means revolve around the object. The unit is adapted to effect a spinning motion of the carrier element around an object substantially stationary relative to the unit such that, during the spinning motion, the carrier element's rotation axis advances along a path which substantially follows the jawbone anatomy. During said spinning motion, projection images of the jawbone over a limited angular range are produced such that areas inside the jawbone arch remain substantially unexposed to radiation. The unit comprises computing means for working out reconstructed volume models by effecting the computation with at least one angular range reconstruction process on the basis of said projection images of a limited angular range, and computing means for working out the required slice images of the region of interest on the basis of said volume models.
摘要翻译：本发明涉及一种用于对颚骨区域进行成像以提供感兴趣区域的切片图像的X射线成像单元和方法。该单元包括载体元件，其包括设置在物体的一侧上的X射线源（20）和设置在与X射线源相对的物体侧的接收装置（21），用于接收透射的辐射用于提供投影图像的对象。载体元件适于围绕其旋转轴线旋转，使得X射线源和接收装置围绕物体旋转。该单元适于实现载体元件围绕物体基本上相对于该单元静止的旋转运动，使得在旋转运动期间，载体元件的旋转轴线沿着基本上沿着颚骨解剖结构的路径前进。在所述旋转运动期间，产生颚骨在有限角度范围内的投影图像，使得颚骨拱内部的区域基本上保持不暴露于辐射。该单元包括用于通过基于有限角度范围的所述投影图像的至少一个角度范围重建过程进行计算来计算重建的体积模型的计算装置，以及用于计算所需区域的所需区域的所需切片图像的计算装置基于所述体积模型的兴趣。

3. 发明申请

WO2006108926A1 TOMOGRAPHIC METHOD 审中-公开
标题翻译： TOMOGRAPHIC方法
公开(公告)号：WO2006108926A1
公开(公告)日：2006-10-19
申请号：PCT/FI2006/050150
申请日：2006-04-12
申请人： GENERAL ELECTRIC COMPANY , KALKE, Martti , SILTANEN, Samuli , SETÄLÄ, Henri
发明人： KALKE, Martti , SILTANEN, Samuli , SETÄLÄ, Henri
IPC分类号： G06T17/00 , A61B6/03 , G06T11/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to a tomographic apparatus for the three-dimensional modelling of an object (2) to be imaged, said tomographic apparatus comprising at least one irradiation source (6) for irradiating the object to be modelled from at least two different directions, and at least one receiving means (8) for receiving the radiation transmitted through the object. The reconstruction parameter is a parameter which determines the behavior in iteration of a reconstruction representing the object to be modelled. The tomographic apparatus comprises means for modelling an object to be imaged by using a non-iterative tomographic modelling algorithm for determining reconstruction parameters for a more accurate computation to be conducted with an iterative tomographic modelling algorithm, in which the computation is conducted from a region of interest in the object.
摘要翻译：本发明涉及一种用于待成像对象（2）的三维建模的断层摄影装置，所述断层摄影装置包括用于从至少两个不同方向照射待建模对象的至少一个照射源（6），以及至少一个用于接收透过物体的辐射的接收装置（8）。重建参数是一个参数，它决定了代表要建模对象的重构的迭代中的行为。断层摄影装置包括用于通过使用非迭代断层摄影建模算法建模待成像对象的装置，用于确定重建参数，以便用迭代层析成像算法进行更准确的计算，其中从对象的兴趣。

4. 发明申请

WO2005057494A1 METHOD AND SYSTEM FOR DETECTING A FIDUCIAL IN DIGITAL PROJECTION IMAGES 审中-公开
标题翻译：用于检测数字投影图像中的图像的方法和系统
公开(公告)号：WO2005057494A1
公开(公告)日：2005-06-23
申请号：PCT/FI2004/000762
申请日：2004-12-14
申请人： INSTRUMENTARIUM CORPORATION , SETÄLÄ, Henri
发明人： SETÄLÄ, Henri
IPC分类号： G06T7/00
CPC分类号： G06K9/4604 , G06T7/75 , Y10S128/922
摘要： The invention relates to a method, system and computer software product for detecting a fiducial in digital projection images, particularly for detecting a fiducial in digital X-ray images automatically, without any operations required of the user. The invention for detecting the image of a fiducial positioned in a digital projection image is characterized in that for at least part of the digital projection image pixels, there is calculated a direction of the intensity gradient; there is defined a region of the projection image, on the basis of the directions of the intensity gradients, where the direction of the intensity gradient is changed according to predetermined limits; and there is defined a matching rate for how well the model describing the image of the predetermined fiducial matches the defined region.
摘要翻译：本发明涉及一种用于检测数字投影图像中的基准的方法，系统和计算机软件产品，特别是用于在不需要用户操作的情况下自动检测数字X射线图像中的基准。用于检测定位在数字投影图像中的基准的图像的本发明的特征在于，对于至少部分数字投影图像像素，计算强度梯度的方向; 基于强度梯度的方向，根据预定的限制，强度梯度的方向改变，定义投影图像的区域; 并且定义了描述预定基准的图像的模型与定义的区域匹配的匹配率。

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