公开(公告)号：US06659646B2

公开(公告)日：2003-12-09

申请号：US10145577

申请日：2002-05-13

申请人： Masayuki Ishikawa ,  Hidetoshi Sunohara ,  Nobuyuki Nakamori ,  Takao Nakae

发明人： Masayuki Ishikawa ,  Hidetoshi Sunohara ,  Nobuyuki Nakamori ,  Takao Nakae

IPC分类号： F16C3206

CPC分类号： F16C33/107 ,  F16C17/02 ,  F16C17/026 ,  F16C33/102 ,  F16C2370/12 ,  G11B19/2018 ,  Y10T29/49639

摘要： An oil dynamic pressure bearing device comprises a bearing, a shaft freely rotatably supported by the bearing in a non-contact manner, and a dynamic pressure bearing section defined by at least one dynamic pressure groove on at least one side of the shaft and the bearing for generating dynamic pressure by a lubricant fluid filled in a minute gap between the shaft and the bearing. Grinding scratches are formed on the dynamic pressure bearing section in a circumferential direction of the dynamic pressure bearing section. The dynamic pressure groove may be formed only on one side of either the shaft or the bearing at the dynamic pressure bearing section and the grinding scratches are formed only on the other side.

公开(公告)号：US5072384A

公开(公告)日：1991-12-10

申请号：US275720

申请日：1988-11-23

申请人： Kunio Doi ,  Nobuyuki Nakamori

发明人： Kunio Doi ,  Nobuyuki Nakamori

IPC分类号： A61B6/00 ,  G06T1/00 ,  G06T5/00 ,  G06T7/60

CPC分类号： G06T7/0083 ,  G06T7/606 ,  G06T2207/10116 ,  G06T2207/20056 ,  G06T2207/30048 ,  G06T2207/30061

摘要： An automated method and system to determine a number of parameters related to the size and shape of the heart as well as parameters related to the lungs from data derived from digital chest radiographs. A cardiac rectangle enclosing the heart and portions of the surrounding lung tissue is determined, and within the cardiac rectangle, horizontal and vertical profiles, and the first derivatives thereof, are determined. Based on these derivatives, cardiac boundary points on the left and right sides of the cardiac contour are determined, as well as diaphragm edge points. A predetermined model function is then fitted to selected of the determined cardiac boundary points to determine the cardiac contour. Tests are performed to determine whether or not the heart has an abnormal size or is a "tall" heart, and if so, corrective measures are taken. In a preferred embodiment, a shift-variant cosine function is used as a model function fitted to the selected cardiac boundary points. In an alternative embodiment, the model function is equivalent to the partial summation of a Fourier series. In an alternative embodiment for determining cardiac boundaries, an analysis is made of edge gradients obtained in two orthogonal directions in plural narrow band regions of the data from the digital chest radiograph.

摘要翻译： 一种自动化方法和系统，用于根据从数字胸部X光照片得到的数据来确定与心脏的大小和形状有关的多个参数以及与肺有关的参数。 确定围绕心脏和周围肺组织的部分的心脏矩形，并且在心矩形内，确定水平和垂直剖面及其一阶导数。 基于这些衍生物，确定心脏轮廓左侧和右侧的心脏边界点以及膜片边缘点。 然后将预定的模型函数拟合到所选择的确定的心脏边界点以确定心脏轮廓。 执行测试以确定心脏是否具有异常大小或是“高”心脏，如果是，采取纠正措施。 在优选实施例中，使用移位变换余弦函数作为拟合到所选择的心脏边界点的模型函数。 在替代实施例中，模型函数等效于傅立叶级数的部分求和。 在用于确定心脏边界的替代实施例中，分析来自数字胸部X光片的数据的多个窄带区域中在两个正交方向上获得的边缘梯度。