公开(公告)号：US20090074276A1

公开(公告)日：2009-03-19

申请号：US12233031

申请日：2008-09-18

申请人： Kunio Doi ,  Shigehiko Katsuragawa ,  Yoshinori Itai ,  Hyoungseop Kim

发明人： Kunio Doi ,  Shigehiko Katsuragawa ,  Yoshinori Itai ,  Hyoungseop Kim

IPC分类号： G06K9/00

CPC分类号： G06T5/50 ,  G06K9/6202 ,  G06K2209/05 ,  G06T2207/10081 ,  G06T2207/20012 ,  G06T2207/20224 ,  G06T2207/30004

摘要： A method for improving the alignment accuracy between different medical images may be disclosed. A warped or non-warped previous image and a warped or non-warped current image may include a plurality of respective previous and current basic units, for example, pixels in a 2-dimensional image or voxels in a 3-dimensional image. To ensure accurate registration between the previous and current images, a first basic unit from the previous image may be replaced by a second basic unit from the current image if the value of the first and second basic units are identical or nearly identical. The first and second basic units may be selected from a nearly-identical region or “kernel” within the previous and current images.

摘要翻译： 可以公开用于改善不同医学图像之间的对准精度的方法。 翘曲或未翘曲的先前图像和翘曲或未翘曲的当前图像可以包括多个相应的先前和当前基本单元，例如二维图像中的像素或三维图像中的体素。 为了确保先前图像和当前图像之间的精确对准，如果第一和第二基本单元的值相同或几乎相同，则来自前一图像的第一基本单元可以被来自当前图像的第二基本单元替换。 第一和第二基本单元可以从先前和当前图像中几乎相同的区域或“核”中选择。

公开(公告)号：US20120136208A1

公开(公告)日：2012-05-31

申请号：US13303839

申请日：2011-11-23

申请人： Yoshinori Itai

发明人： Yoshinori Itai

IPC分类号： A61B1/04 ,  G06K9/00

CPC分类号： G06T19/003 ,  G06T2210/41

摘要： An observation path setting unit sets an observation path. A viewpoint setting and changing unit sets a viewpoint on the observation path. When a virtual endoscopic image viewed from the viewpoint is generated, a visual range determination unit identifies, based on a three-dimensional medical image, the position of a wall region of the tubular structure in a local observation direction at the viewpoint that has been set by the viewpoint setting and changing unit and in the vicinity of the local observation direction. The visual range determination unit estimates, based on a positional relationship between the viewpoint and the wall region, a global observation direction at the viewpoint, and determines a visual range of the virtual endoscopic image in such a manner that image information about a region located in the global observation direction with respect to the viewpoint is represented at a central part of the virtual endoscopic image.

摘要翻译： 观察路径设定单元设定观察路径。 视点设置和改变单元在观察路径上设置视点。 当产生从视点观看的虚拟内窥镜图像时，视觉范围确定单元基于三维医学图像，以已设定的视点来识别管状结构的局部观察方向的壁区域的位置 通过视点设置和改变单元以及局部观察方向附近。 视觉范围确定单元基于视点和壁区域之间的位置关系来估计视点处的全局观察方向，并且以这样的方式确定虚拟内窥镜图像的视觉范围，使得关于位于 关于视点的全局观察方向表示在虚拟内窥镜图像的中心部分。

公开(公告)号：US09024941B2

公开(公告)日：2015-05-05

申请号：US13303839

申请日：2011-11-23

申请人： Yoshinori Itai

发明人： Yoshinori Itai

IPC分类号： G06T15/00 ,  G06T19/00

CPC分类号： G06T19/003 ,  G06T2210/41

摘要： An observation path setting unit sets an observation path. A viewpoint setting and changing unit sets a viewpoint on the observation path. When a virtual endoscopic image viewed from the viewpoint is generated, a visual range determination unit identifies, based on a three-dimensional medical image, the position of a wall region of the tubular structure in a local observation direction at the viewpoint that has been set by the viewpoint setting and changing unit and in the vicinity of the local observation direction. The visual range determination unit estimates, based on a positional relationship between the viewpoint and the wall region, a global observation direction at the viewpoint, and determines a visual range of the virtual endoscopic image in such a manner that image information about a region located in the global observation direction with respect to the viewpoint is represented at a central part of the virtual endoscopic image.

摘要翻译： 观察路径设定单元设定观察路径。 视点设置和改变单元在观察路径上设置视点。 当产生从视点观看的虚拟内窥镜图像时，视觉范围确定单元基于三维医学图像，以已设定的视点来识别管状结构的局部观察方向的壁区域的位置 通过视点设置和改变单元以及局部观察方向附近。 视觉范围确定单元基于视点和壁区域之间的位置关系来估计视点处的全局观察方向，并且以这样的方式确定虚拟内窥镜图像的视觉范围，使得关于位于 关于视点的全局观察方向表示在虚拟内窥镜图像的中心部分。