公开(公告)号：US07215801B2

公开(公告)日：2007-05-08

申请号：US10456280

申请日：2003-06-05

申请人： Clifford Bueno ,  Elizabeth Dixon ,  Walter Dixon ,  Forrest Hopkins ,  Michael Hopple ,  Brian Lasiuk ,  Ronald McFarland ,  August Matula ,  Robert Mitchell, Jr. ,  Kevin Moermond ,  Gregory Mohr

发明人： Clifford Bueno ,  Elizabeth Dixon ,  Walter Dixon ,  Forrest Hopkins ,  Michael Hopple ,  Brian Lasiuk ,  Ronald McFarland ,  August Matula ,  Robert Mitchell, Jr. ,  Kevin Moermond ,  Gregory Mohr

IPC分类号： G06K9/00

CPC分类号： G06T5/009 ,  A61B6/583 ,  G01N2223/42 ,  G06T1/20 ,  G06T2200/24 ,  G06T2207/10116

摘要： A method, system and apparatus for processing a radiographic image of a scanned object is disclosed. A pixel offset correction is performed in integer format on the radiographic image using saturation arithmetic to produce an image in integer format with any negative corrected values clipped to a value of zero. The resulting pixels are converted to floating point format and the converted pixels are multiplied by a gain factor. Optionally the resulting pixels are recursively averaged with previous results. The resulting pixels are converted to integer format and the converted pixel values are clamped to a maximum value using saturation arithmetic. Non-functional pixel correction is performed in integer format and the resulting pixel values are clamped to a maximum value using saturation arithmetic. An optional processing path replaces the recursive average by a linear average. The resulting pixel values are optionally filtered to enhance features of interest. The resulting pixel value is mapped in integer format to a palette index to establish an output pixel intensity having one of many intensity levels. The optional processing is controlled through the hardware interface of a real-time image controller as images are acquired.

摘要翻译： 公开了一种用于处理扫描对象的放射线图像的方法，系统和装置。 使用饱和运算在放射线照相图像上以整数格式执行像素偏移校正，以产生整数格式的图像，任何负校正值被削减到零值。 将所得到的像素转换为浮点格式，并将转换的像素乘以增益因子。 可选地，所得到的像素与先前的结果递归地平均。 所得到的像素被转换为整数格式，并且使用饱和运算将转换的像素值钳位到最大值。 以整数格式执行非功能像素校正，并且使用饱和算术将所得到的像素值钳位到最大值。 可选的处理路径将递归平均值替换为线性平均值。 所得到的像素值可选地被过滤以增强感兴趣的特征。 将所得到的像素值以整数格式映射到调色板索引，以建立具有许多强度级别之一的输出像素强度。 当获取图像时，通过实时图像控制器的硬件接口来控制可选处理。

公开(公告)号：US20080166033A1

公开(公告)日：2008-07-10

申请号：US11684176

申请日：2007-03-09

申请人： Clifford Bueno ,  Elizabeth Dixon ,  Walter Dixon ,  Forrest Hopkins ,  Michael Hopple ,  Brian Lasiuk ,  Ronald McFarland ,  August Matula ,  Robert Mitchell ,  Kevin Moermond ,  Gregory Mohr

发明人： Clifford Bueno ,  Elizabeth Dixon ,  Walter Dixon ,  Forrest Hopkins ,  Michael Hopple ,  Brian Lasiuk ,  Ronald McFarland ,  August Matula ,  Robert Mitchell ,  Kevin Moermond ,  Gregory Mohr

IPC分类号： G06K9/00

CPC分类号： G06T5/009 ,  A61B6/583 ,  G01N2223/42 ,  G06T1/20 ,  G06T2200/24 ,  G06T2207/10116

摘要： A method, system and apparatus for processing a radiographic image of a scanned object is disclosed. A pixel offset correction is performed in integer format on the radiographic image using saturation arithmetic to produce an image in integer format with any negative corrected values clipped to a value of zero. The resulting pixels are converted to floating point format and the converted pixels are multiplied by a gain factor. Optionally the resulting pixels are recursively averaged with previous results. The resulting pixels are converted to integer format and the converted pixel values are clamped to a maximum value using saturation arithmetic. Non-functional pixel correction is performed in integer format and the resulting pixel values are clamped to a maximum value using saturation arithmetic. An optional processing path replaces the recursive average by a linear average. The resulting pixel values are optionally filtered to enhance features of interest. The resulting pixel value is mapped in integer format to a palette index to establish an output pixel intensity having one of many intensity levels. The optional processing is controlled through the hardware interface of a real-time image controller as images are acquired.

摘要翻译： 公开了一种用于处理扫描对象的放射线图像的方法，系统和装置。 使用饱和运算在放射线照相图像上以整数格式执行像素偏移校正，以产生整数格式的图像，任何负校正值被削减为零。 将所得到的像素转换为浮点格式，并将转换的像素乘以增益因子。 可选地，所得到的像素与先前的结果递归地平均。 所得到的像素被转换为整数格式，并且使用饱和运算将转换的像素值钳位到最大值。 以整数格式执行非功能像素校正，并且使用饱和算术将所得到的像素值钳位到最大值。 可选的处理路径将递归平均值替换为线性平均值。 所得到的像素值可选地被过滤以增强感兴趣的特征。 将所得到的像素值以整数格式映射到调色板索引，以建立具有许多强度级别之一的输出像素强度。 当获取图像时，通过实时图像控制器的硬件接口来控制可选处理。

公开(公告)号：US20060058974A1

公开(公告)日：2006-03-16

申请号：US11108498

申请日：2005-04-18

申请人： Brian Lasiuk ,  Thomas Batzinger ,  Manoharan Venugopal ,  Elizabeth Dixon ,  Michael Hopple ,  Nityanand Gopalika ,  Sivaramanivas Ramaswamy ,  Debasish Mishra ,  Rajashekar Venkatachalam ,  Vamshi Reddy Kommareddy

发明人： Brian Lasiuk ,  Thomas Batzinger ,  Manoharan Venugopal ,  Elizabeth Dixon ,  Michael Hopple ,  Nityanand Gopalika ,  Sivaramanivas Ramaswamy ,  Debasish Mishra ,  Rajashekar Venkatachalam ,  Vamshi Reddy Kommareddy

IPC分类号： G01C25/00 ,  G06F19/00

CPC分类号： G01B15/025

摘要： A digital radiography imaging system for acquiring digital images of an object, and a method for transforming digital images into an absolute thickness map characterizing the object under inspection. The system includes a radiation source for directing radiation through a desired region of the object, and a radiation detector having a plurality of sensing elements for detecting radiation passing through the object. Numerical data generated from each sensing element is calibrated, for example by correcting for variations in radiation paths between the source and detector, by correcting for variations in the spatial frequency response (MTF) of the detector, by correcting for variations in the geometric profile of the object under inspection, and by correcting for material contained in and/or around the object. The calibrated data is processed in order to generate and display an absolute thickness map of the object. The calibration procedures are adapted for extracting a thickness map from both isotope sources and X-ray tube sources.