Methods and apparatus for individually optimizing uniform contrast enhancements in computed tomography imaging
    1.
    发明授权
    Methods and apparatus for individually optimizing uniform contrast enhancements in computed tomography imaging 有权
    用于单独优化计算机断层摄影成像中均匀对比度增强的方法和装置

    公开(公告)号:US09456798B2

    公开(公告)日:2016-10-04

    申请号:US14710052

    申请日:2015-05-12

    摘要: A method is provided for optimizing a contrast injection function for CT imaging. The method includes injecting, with an injector pump, a test bolus of a contrast agent into a subject. The method also includes computing, on a processor, an impulse enhancement function. The method also includes determining, on a processor, a target enhancement function for a region of interest. The method also includes determining, with a processor, a plurality of parameters for a functional form for a contrast injection function in a time domain. The method also includes determining for the contrast injection function a constraint. The method also includes determining, with a processor, particular values for the plurality of parameters, which satisfy the constraint and minimize a difference between a value of an enhancement function and the target enhancement function computed in the time domain at discrete time periods without use of a Fourier transform.

    摘要翻译: 提供了一种用于优化CT成像的造影剂注射功能的方法。 该方法包括用注射器泵将造影剂的测试团注入受试者。 该方法还包括在处理器上计算脉冲增强功能。 该方法还包括在处理器上确定感兴趣区域的目标增强功能。 该方法还包括使用处理器确定用于时域中的对比度注入功能的功能形式的多个参数。 该方法还包括确定对比度注入功能的约束。 该方法还包括使用处理器确定满足约束的多个参数的特定值,并且使离散时间段内在增强函数的值和在时域中计算的目标增强函数之间的差最小化,而不使用 傅立叶变换。

    METHODS AND APPARATUS FOR INDIVIDUALLY OPTIMIZING UNIFORM CONTRAST ENHANCEMENTS IN COMPUTED TOMOGRAPHY IMAGING
    2.
    发明申请
    METHODS AND APPARATUS FOR INDIVIDUALLY OPTIMIZING UNIFORM CONTRAST ENHANCEMENTS IN COMPUTED TOMOGRAPHY IMAGING 有权
    在计算机图像成像中单独优化均匀对比增强的方法和装置

    公开(公告)号:US20150324979A1

    公开(公告)日:2015-11-12

    申请号:US14710052

    申请日:2015-05-12

    IPC分类号: G06T7/00 G06T11/00

    摘要: A method is provided for optimizing a contrast injection function for CT imaging. The method includes injecting, with an injector pump, a test bolus of a contrast agent into a subject. The method also includes computing, on a processor, an impulse enhancement function. The method also includes determining, on a processor, a target enhancement function for a region of interest. The method also includes determining, with a processor, a plurality of parameters for a functional form for a contrast injection function in a time domain. The method also includes determining for the contrast injection function a constraint. The method also includes determining, with a processor, particular values for the plurality of parameters, which satisfy the constraint and minimize a difference between a value of an enhancement function and the target enhancement function computed in the time domain at discrete time periods without use of a Fourier transform.

    摘要翻译: 提供了一种用于优化CT成像的造影剂注射功能的方法。 该方法包括用注射器泵将造影剂的测试团注入受试者。 该方法还包括在处理器上计算脉冲增强功能。 该方法还包括在处理器上确定感兴趣区域的目标增强功能。 该方法还包括使用处理器确定用于时域中的对比度注入功能的功能形式的多个参数。 该方法还包括确定对比度注入功能的约束。 该方法还包括使用处理器确定满足约束的多个参数的特定值,并且使离散时间段内在增强函数的值和在时域中计算的目标增强函数之间的差最小化,而不使用 傅立叶变换。

    QUANTITATIVE EVALUATION OF FRACTIONAL REGIONAL VENTILATION USING FOUR-DIMENSIONAL COMPUTED TOMOGRAPHY
    4.
    发明申请
    QUANTITATIVE EVALUATION OF FRACTIONAL REGIONAL VENTILATION USING FOUR-DIMENSIONAL COMPUTED TOMOGRAPHY 审中-公开
    使用四维计算机图像分类区域通气的定量评估

    公开(公告)号:US20130303899A1

    公开(公告)日:2013-11-14

    申请号:US13894314

    申请日:2013-05-14

    IPC分类号: A61B6/00

    摘要: Methods and systems for determining fractional regional ventilation are disclosed. A method includes obtaining first and second lung image data indicative of a first phase and a second phase of a respiratory cycle, respectively, determining an apparent mass ratio k based on the first lung image data and the second lung image data, determining first and second spatially matched lung image data, each including N voxels, based on the first lung image data and the second lung image data, and determining at least one fractional regional ventilation value (FRV value), in accordance with a first equation FRV(n)=(k·ρ2_n−ρ1_n)/ρ1_n. The value of n is a voxel index, ρ1_n is indicative of a density of a voxel n of the first spatially matched lung image data, and ρ2_n is indicative of a density of a voxel n of the second spatially matched lung image data.

    摘要翻译: 公开了确定分区式通风的方法和系统。 一种方法包括分别获得指示呼吸周期的第一阶段和第二阶段的第一和第二肺图像数据,基于第一肺图像数据和第二肺图像数据确定视在质量比k,确定第一和第二 基于第一肺图像数据和第二肺图像数据,并且根据第一等式FRV(n)= 1确定至少一个分数区域通气量值(FRV值),确定空间匹配的肺图像数据,每个包括N个体素 (k·rho2_n-rho1_n)/ rho1_n。 n的值是体元索引,rho1_n表示第一空间匹配肺图像数据的体素n的密度,并且rho2_n表示第二空间匹配肺图像数据的体素n的密度。

    Method for monitoring the accuracy of tissue motion prediction from surrogates
    5.
    发明授权
    Method for monitoring the accuracy of tissue motion prediction from surrogates 有权
    监测代用品组织运动预测精度的方法

    公开(公告)号:US09433389B2

    公开(公告)日:2016-09-06

    申请号:US13531044

    申请日:2012-06-22

    摘要: A system and method for indirectly monitoring the position of a target inside a body is disclosed. The method includes generating position data associated with one or more surrogate devices and predicting a location of the target from the position data based on a target position model that establishes a relationship between an actual location of the target and the position data of the one or more surrogate devices. The method also includes determining that the predicted location of the target deviates from the actual location of the target when an analysis of an error prediction model results in a confidence threshold being exceeded.

    摘要翻译: 公开了一种用于间接监测身体内的目标位置的系统和方法。 该方法包括生成与一个或多个替代设备相关联的位置数据,并且基于建立目标的实际位置与一个或多个位置数据的位置数据之间的关系的目标位置模型从位置数据预测目标的位置 替代设备 当误差预测模型的分析导致超过置信阈值时,该方法还包括确定目标的预测位置偏离目标的实际位置。

    Method For Monitoring the Accuracy of Tissue Motion Prediction from Surrogates
    6.
    发明申请
    Method For Monitoring the Accuracy of Tissue Motion Prediction from Surrogates 有权
    监测代谢组织运动预测精度的方法

    公开(公告)号:US20130018232A1

    公开(公告)日:2013-01-17

    申请号:US13531044

    申请日:2012-06-22

    IPC分类号: A61B5/00 G06G7/60

    摘要: A system and method for indirectly monitoring the position of a target inside a body is disclosed. The method includes generating position data associated with one or more surrogate devices and predicting a location of the target from the position data based on a target position model that establishes a relationship between an actual location of the target and the position data of the one or more surrogate devices. The method also includes determining that the predicted location of the target deviates from the actual location of the target when an analysis of an error prediction model results in a confidence threshold being exceeded.

    摘要翻译: 公开了一种用于间接监测身体内的目标位置的系统和方法。 该方法包括生成与一个或多个替代设备相关联的位置数据,并且基于建立目标的实际位置与一个或多个位置数据的位置数据之间的关系的目标位置模型从位置数据预测目标的位置 替代设备 当误差预测模型的分析导致超过置信阈值时,该方法还包括确定目标的预测位置偏离目标的实际位置。