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1.发明申请WAVELET SNAKE TECHNIQUE FOR DISCRIMINATION OF NODULES AND FALSE POSITIVES IN DIGITAL RADIOGRAPHS 审中-公开数字放射线中小波和伪波数的小波蛇图技术
公开(公告)号：WO9905639A8
公开(公告)日：1999-06-17
申请号：PCT/US9815278
申请日：1998-07-24
Applicant: ARCH DEV CORP
Inventor： YOSHIDA HIROYUKI , KATUSURAGAWA SHIGEHIKO , AMIT YALI , DOI KUNIO
CPC classification number: G06K9/6206 , G06T7/0012
Abstract: A method and apparatus for discrimination of nodules and false positive in digital chest radiographs, using a wavelet snake technique (1802; 1804; 1806; 1808). The wavelet snake is a deformable contour designed to identify the boundary of a relatively round object (1900). The shape of the snake is determined by a set of wavelet coefficient in a certain range of scales. Portions of the boundary of a nodule are first extracted using a multiscale edge representation. The multiscale edge are then fitted (2000; 1814) by a gradient descent procedure which deforms the shape of a wavelet snake by changing its wavelet coefficients. The degree of overlap between the fitted snake and the multiscale edges is calculated and used as a fit quality indicator for discrimination of nodules and false detection (1816; 1818; 1820).
Abstract translation: 一种使用小波蛇技术（1802; 1804; 1806; 1808）来鉴别数字胸部X光片中的结节和假阳性的方法和装置。 小波蛇是一种可变形的轮廓，用于识别相对圆形物体的边界（1900）。 蛇的形状由一定尺度范围内的一组小波系数决定。 首先使用多尺度边缘表示来提取结节边界的部分。 然后通过梯度下降程序拟合多尺度边（2000; 1814），其通过改变其小波系数来变形小波蛇的形状。 计算拟合蛇和多尺度边缘之间的重叠程度，并将其用作区分结节和错误检测的适合质量指标（1816; 1818; 1820）。
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2.发明申请WAVELET SNAKE TECHNIQUE FOR DISCRIMINATION OF NODULES AND FALSE POSITIVES IN DIGITAL RADIOGRAPHS 审中-公开用于歧视数字无线电广播中的节目和虚拟角色的小波收音机技术
公开(公告)号：WO9905639A9
公开(公告)日：1999-04-22
申请号：PCT/US9815278
申请日：1998-07-24
Applicant: ARCH DEV CORP
Inventor： YOSHIDA HIROYUKI , KATUSURAGAWA SHIGEHIKO , AMIT YALI , DOI KUNIO
CPC classification number: G06K9/6206 , G06T7/0012
Abstract: A method and apparatus for discrimination of nodules and false positive in digital chest radiographs, using a wavelet snake technique (1802; 1804; 1806; 1808). The wavelet snake is a deformable contour designed to identify the boundary of a relatively round object (1900). The shape of the snake is determined by a set of wavelet coefficient in a certain range of scales. Portions of the boundary of a nodule are first extracted using a multiscale edge representation. The multiscale edge are then fitted (2000; 1814) by a gradient descent procedure which deforms the shape of a wavelet snake by changing its wavelet coefficients. The degree of overlap between the fitted snake and the multiscale edges is calculated and used as a fit quality indicator for discrimination of nodules and false detection (1816; 1818; 1820).
Abstract translation: 使用小波蛇技术（1802; 1804; 1806; 1808）在数字胸片中鉴别结节和假阳性的方法和装置。 小波蛇是一种可变形轮廓，用于识别相对圆形物体的边界（1900）。 蛇的形状由一定范围的小波系数确定。 首先使用多尺度边缘表示提取结节边界的部分。 然后通过梯度下降程序将多尺度边缘拟合（2000; 1814），其通过改变其小波系数来变形小波蛇的形状。 计算拟合蛇和多尺度边缘之间的重叠程度，并将其用作辨别结节和错误检测的适合质量指标（1816; 1818; 1820）。
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3.发明专利
公开(公告)号：AU8509998A
公开(公告)日：1999-02-16
申请号：AU8509998
申请日：1998-07-24
Applicant: ARCH DEV CORP
Inventor： YOSHIDA HIROYUKI , KATUSURAGAWA SHIGEHIKO , AMIT YALI , DOI KUNIO
Abstract: A method and apparatus for discrimination of nodules and false positives in digital chest radiographs, using a wavelet snake technique. The wavelet snake is a deformable contour designed to identify the boundary of a relatively round object. The shape of the snake is determined by a set of wavelet coefficients in a certain range of scales. Portions of the boundary of a nodule are first extracted using a multiscale edge representation. The multiscale edges are then fitted by a gradient descent procedure which deforms the shape of a wavelet snake by changing its wavelet coefficients. The degree of overlap between the fitted snake and the multiscale edges is calculated and used as a fit quality indicator for discrimination of nodules and false detections.
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