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1.发明公开Spatially-selective edge enhancement for discrete pixel images 审中-公开Räumlichselektive RandverbesserungfürBilder mit diskreten Bildelementen
公开(公告)号：EP0971316A2
公开(公告)日：2000-01-12
申请号：EP99305432.9
申请日：1999-07-08
IPC分类号： G06T5/00
CPC分类号： G06T5/003 , G06T5/50 , G06T2207/10116 , G06T2207/20016 , G06T2207/20192 , G06T2207/30004
摘要： A discrete pixel image (106) is enhanced to bring out particular features of interest such as edges. The enhancement includes decomposition of the original processed image data, enhancement by application of gain images to the decomposed images, and reconstruction of the enhanced image. The decomposition proceeds through a series of low-pass filters (110,112) to arrive at decomposed images of progressively lower spatial frequencies. These decomposed images are then multiplied by gain images during the enhancement phase. Gain images for at least the higher spatial frequency level images are derived (116) from lower spatial frequency level images. These spatial frequency-based gain images may be based upon operator inputs, including a spatial sensitivity, fimction and an edge enhancement value. Lower spatial frequency level images may be processed by application (118) of predetermined gain values. The reconstruction sequence recombines the decomposed images (120) after application of the gains to arrive at an enhanced image of the same dimensions as the original image.
摘要翻译： 离散像素图像（106）被增强以产生诸如边缘的特定特征。 该增强包括原始处理的图像数据的分解，通过对分解的图像应用增益图像的增强以及增强图像的重建。 分解通过一系列低通滤波器（110,112）进行，以得到逐渐降低的空间频率的分解图像。 然后在增强阶段将这些分解图像乘以增益图像。 从低空间频率水平图像导出（116）至少较高空间频率水平图像的增益图像。 这些基于空间频率的增益图像可以基于操作者输入，包括空间灵敏度，补偿和边缘增强值。 低空间频率电平图像可以由预定增益值的应用（118）来处理。 重建序列在施加增益之后重组分解的图像（120），以得到与原始图像相同尺寸的增强图像。
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2.发明公开Apparatus and method for X-ray collimator sizing and alignment 审中-公开装置和方法用于Röntgenstrahlungskollimators的校准和调整
公开(公告)号：EP1065670A3
公开(公告)日：2003-11-26
申请号：EP00305467.3
申请日：2000-06-29
发明人： Kump, Kenneth Scott , Dwyer, John E. Jr. , Aufrichtig, Richard , Duemer, Dale , Bechthold, John E.
摘要： The present invention provides a method (200) and apparatus for calibrating the size and alignment of a collimator. The method (200) includes the step of 5 acquiring a digital image showing collimator blades in front of a region of interest (208). The method (200) then determines the position of one or more of the collimator blades or collimator assembly shown in the digital image (218). The method then adjusts the position of one or more collimator blades toward a predetermined position with respect to the region of interest (226). Calibration may iterate until the collimator position exposes the region of interest (226) to within a predetermined tolerance.
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3.发明公开Neural network prediction for radiographic x-ray exposures 审中-公开Vorhersagung durch neuronales NetzwerkfürRöntgenaufnahmen
公开(公告)号：EP0979027A2
公开(公告)日：2000-02-09
申请号：EP99306158.9
申请日：1999-08-03
CPC分类号： H05G1/28
摘要： A neural network prediction has been provided for predicting radiation exposure and/or Air-Kerma at a predefined arbitrary distance during an x-ray exposure; and for predicting radiation exposure and/or Air-Kerma area product for a radiographic x-ray exposure. The Air-Kerma levels are predicted directly from the x-ray exposure parameters. The method or model is provided to predict the radiation exposure or Air-Kerma for an arbitrary radiographic x-ray exposure by providing input variables (36,38,40) to identify the spectral characteristics of the x-ray beam, providing a neural net (32) which has been trained to calculate the exposure or Air-Kerma value, and by scaling (34) the neural net output by the calibrated tube efficiency (52), and the actual current through the x-ray tube and the duration of the exposure. The prediction for exposure/Air-Kerma further applies (50) the actual source-toobject distance, and the prediction for exposure/AirKerma area product further applies (54) the actual imaged field area at a source-to-image distance.
摘要翻译： 已经提供了神经网络预测用于在x射线曝光期间以预定义的任意距离预测辐射暴露和/或空气 - 凯尔马（Air-Kerma） 并用于预测放射线照射和/或Air-Kerma区域产品用于放射X光曝光。 可以直接从x射线曝光参数预测空气凯尔玛水平。 提供该方法或模型以通过提供输入变量（36,38,40）来识别X射线束的光谱特征来预测用于任意射线照相X射线曝光的辐射暴露或空气 - 凯尔马，提供神经网络 （32），其已经被训练以计算暴露或空气凯马值，并且通过校准管效率（52）和通过X射线管的实际电流来缩放（34）神经网络输出和持续时间 曝光。 曝光/空气 - 凯尔马的预测进一步适用（50）实际的源对象距离，并且对于曝光/ AirKerma区域产品的预测进一步应用（54）源到图像距离处的实际成像场区域。
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公开(公告)号：EP0979027A3
公开(公告)日：2001-08-29
申请号：EP99306158.9
申请日：1999-08-03
CPC分类号： H05G1/28
摘要： A neural network prediction has been provided for predicting radiation exposure and/or Air-Kerma at a predefined arbitrary distance during an x-ray exposure; and for predicting radiation exposure and/or Air-Kerma area product for a radiographic x-ray exposure. The Air-Kerma levels are predicted directly from the x-ray exposure parameters. The method or model is provided to predict the radiation exposure or Air-Kerma for an arbitrary radiographic x-ray exposure by providing input variables (36,38,40) to identify the spectral characteristics of the x-ray beam, providing a neural net (32) which has been trained to calculate the exposure or Air-Kerma value, and by scaling (34) the neural net output by the calibrated tube efficiency (52), and the actual current through the x-ray tube and the duration of the exposure. The prediction for exposure/Air-Kerma further applies (50) the actual source-toobject distance, and the prediction for exposure/AirKerma area product further applies (54) the actual imaged field area at a source-to-image distance.
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5.发明公开
公开(公告)号：EP0874536A1
公开(公告)日：1998-10-28
申请号：EP98302184.1
申请日：1998-03-24
摘要： An image quality test phantom tool is provided for use in the calibration and standardization of digital x-ray fluoroscopy and radiography systems. A composite phantom (10) has a base (12) for providing mechanical stability, a mesh (14) with a central cut-out overlaid on the base, inserts (15,16,20,22) positioned in the cut-out, and a carrier (24) for housing the composite phantom. A digital image of the phantom is processed to compute x-ray system image quality measurements.
摘要翻译： 的图像质量测试体模工具提供了一种用于在数字X射线荧光和摄影系统的校准和标准化的用途。 的复合体模（10）具有用于提供机械稳定性的基座（12），网状（14）具有中央切口覆盖在基座上，在切出的定位插入物（15,16,20,22）， 和用于容纳所述复合体模的载体（24）。 假想的数字图像进行处理，以计算x射线系统的图像质量的测量。
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公开(公告)号：EP0971316A3
公开(公告)日：2000-01-19
申请号：EP99305432.9
申请日：1999-07-08
IPC分类号： G06T5/00
CPC分类号： G06T5/003 , G06T5/50 , G06T2207/10116 , G06T2207/20016 , G06T2207/20192 , G06T2207/30004
摘要： A discrete pixel image (106) is enhanced to bring out particular features of interest such as edges. The enhancement includes decomposition of the original processed image data, enhancement by application of gain images to the decomposed images, and reconstruction of the enhanced image. The decomposition proceeds through a series of low-pass filters (110,112) to arrive at decomposed images of progressively lower spatial frequencies. These decomposed images are then multiplied by gain images during the enhancement phase. Gain images for at least the higher spatial frequency level images are derived (116) from lower spatial frequency level images. These spatial frequency-based gain images may be based upon operator inputs, including a spatial sensitivity, fimction and an edge enhancement value. Lower spatial frequency level images may be processed by application (118) of predetermined gain values. The reconstruction sequence recombines the decomposed images (120) after application of the gains to arrive at an enhanced image of the same dimensions as the original image.
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7.发明公开Apparatus and method for X-ray collimator sizing and alignment 审中-公开Vorrichtung und Verfahren zur Kalibrierung und Justierung einesRöntgenstrahlungskollimators
公开(公告)号：EP1065670A2
公开(公告)日：2001-01-03
申请号：EP00305467.3
申请日：2000-06-29
发明人： Kump, Kenneth Scott , Dwyer, John E. Jr. , Aufrichtig, Richard , Duemer, Dale , Bechthold, John E.
IPC分类号： G21K1/04
摘要： The present invention provides a method (200) and apparatus for calibrating the size and alignment of a collimator. The method (200) includes the step of 5 acquiring a digital image showing collimator blades in front of a region of interest (208). The method (200) then determines the position of one or more of the collimator blades or collimator assembly shown in the digital image (218). The method then adjusts the position of one or more collimator blades toward a predetermined position with respect to the region of interest (226). Calibration may iterate until the collimator position exposes the region of interest (226) to within a predetermined tolerance.
摘要翻译： 本发明提供了一种用于校准准直器的尺寸和对准的方法（200）和装置。 方法（200）包括以下步骤：获取在感兴趣区域（208）前方显示准直器叶片的数字图像。 方法（200）然后确定数字图像（218）中所示的准直仪叶片或准直仪组件中的一个或多个的位置。 然后，该方法将一个或多个准直器叶片的位置相对于感兴趣区域（226）调整到预定位置。 校准可以迭代直到准直器位置将感兴趣区域（226）暴露于预定公差内。
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8.发明公开Modular interchangeable phantoms for multiple X-ray systems 审中-公开Modulare austauschbare PhantomefürmehrereRöntgensysteme
公开(公告)号：EP1062912A1
公开(公告)日：2000-12-27
申请号：EP00305093.7
申请日：2000-06-16
IPC分类号： A61B6/00
CPC分类号： A61B6/583
摘要： A variety of x-ray phantoms (100) may be interchangeably inserted into a modular phantom carrier (400). The phantom (100) is locked to the carrier (400) by either at least one rotating fastener (460) or a plastic ring with at least one fastening pin. The phantom carrier (400) also includes an interior mesh (440) allowing measurement of the resolution non-uniformity of the x-ray system. Each phantom (100) includes a number of sub-phantoms (150,160,170,190,195) useful in the determination of various parameters of the x-ray system. These sub-phantoms (150,160,170,190,195) include a step-intensity sub-phantom, a contrast detail sub-phantom (160), a mesh sub-phantom, and a resolution sub-phantom (170) and a coupon sub-phantom both for measuring the Modulation Transfer Function (MT F) of the x-ray system. A lead perimeter ring (130) attached near the perimeter of each phantom (100) aids in the orientation and positioning of the phantom (100) lead line segments (140) or fiducials (340) aid in separating or outlining various sub-phantoms (150,160,170,190,195).
摘要翻译： 各种x射线幻影（100）可以互换地插入到模块化幻影载体（400）中。 至少一个旋转紧固件（460）或具有至少一个紧固销的塑料环将体模（100）锁定到托架（400）上。 幻影载体（400）还包括允许测量x射线系统的分辨率不均匀性的内部网（440）。 每个幻影（100）包括许多可用于确定x射线系统的各种参数的子幻影（150,160,170,190,195）。 这些子幻影（150,160,170,190,195）包括步强度子幻影，对比细节子幻影（160），网格子幻影和分辨率子幻像（170）以及用于测量的优惠券子幻影 x射线系统的调制传递函数（MT F）。 连接在每个模体（100）的周边附近的引线周边环（130）有助于假想线（100）引线段（140）或基准（340）的取向和定位有助于分离或概述各种子幻影（ 150,160,170,190,195）。
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