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    • 4. 发明授权
    • Automatic point-wise validation of respiratory motion estimation
    • 自动点对点呼吸运动估计
    • US09171377B2
    • 2015-10-27
    • US13808607
    • 2011-07-05
    • Sven KabusTobias KlinderCristian Lorenz
    • Sven KabusTobias KlinderCristian Lorenz
    • G06K9/00G06T7/20G06T3/00G06T7/00
    • G06T7/20G06T3/0081G06T7/0016G06T7/30G06T2207/10081G06T2207/30061
    • A system for validating motion estimation comprising a field unit (110) for obtaining a deformation vector field (DVF) estimating the motion by transforming a first image at a first phase of the motion into a second image at a second phase of the motion, a metric unit (120) for computing a metric of a local volume change at a plurality of locations, and a conformity unit (130) for computing a conformity measure based on the computed metric of the local volume change at the plurality of locations and a local property of the first or second image defined at the plurality of locations. Based on the value of the conformity measure, the DFV estimating the motion is validated. Experiments show that the conformity measure based on the computed metric of a local volume change at a plurality of locations and the local property of the first or second image, defined at the plurality of locations, does not necessarily favor a large weight for the outer force to provide a more accurate registration. One reason for this observation may be that large deformations providing more accurate alignment often lead to deformations resulting in unreasonably large volume changes. DVFs comprising such deformations thus are more likely to be discarded by the system of the invention.
    • 一种用于验证运动估计的系统,包括:场单元(110),用于通过在运动的第二阶段将运动的第一阶段的第一图像变换为第二图像来获得估计运动的变形矢量场(DVF); 用于计算多个位置处的本地卷变化的度量的度量单位(120),以及用于基于所计算的所述多个位置处的本地卷变化的度量的度量单位(130)以及局部 在多个位置定义的第一或第二图像的属性。 根据合格度的值,对运动的DFV进行了验证。 实验表明,基于多个位置处的局部体积变化的计算度量和在多个位置处限定的第一或第二图像的局部属性的一致性度量不一定有利于外力的大重量 提供更准确的注册。 这种观察的一个原因可能是提供更精确对准的大变形通常导致变形,导致不合理地大的体积变化。 包括这种变形的DVF因此更可能被本发明的系统丢弃。
    • 8. 发明申请
    • AUTOMATIC POINT-WISE VALIDATION OF RESPIRATORY MOTION ESTIMATION
    • 呼吸运动估计的自动点智慧验证
    • US20130108117A1
    • 2013-05-02
    • US13808607
    • 2011-07-05
    • Sven KabusTobias KlinderCristian Lorenz
    • Sven KabusTobias KlinderCristian Lorenz
    • G06T7/20
    • G06T7/20G06T3/0081G06T7/0016G06T7/30G06T2207/10081G06T2207/30061
    • A system for validating motion estimation comprising a field unit (110) for obtaining a deformation vector field (DVF) estimating the motion by transforming a first image at a first phase of the motion into a second image at a second phase of the motion, a metric unit (120) for computing a metric of a local volume change at a plurality of locations, and a conformity unit (130) for computing a conformity measure based on the computed metric of the local volume change at the plurality of locations and a local property of the first or second image defined at the plurality of locations. Based on the value of the conformity measure, the DFV estimating the motion is validated. Experiments show that the conformity measure based on the computed metric of a local volume change at a plurality of locations and the local property of the first or second image, defined at the plurality of locations, does not necessarily favor a large weight for the outer force to provide a more accurate registration. One reason for this observation may be that large deformations providing more accurate alignment often lead to deformations resulting in unreasonably large volume changes. DVFs comprising such deformations thus are more likely to be discarded by the system of the invention.
    • 一种用于验证运动估计的系统,包括:场单元(110),用于通过在运动的第二阶段将运动的第一阶段的第一图像变换为第二图像来获得估计运动的变形矢量场(DVF); 用于计算多个位置处的本地卷变化的度量的度量单位(120),以及用于基于所计算的所述多个位置处的本地卷变化的度量的度量单位(130)以及局部 在多个位置定义的第一或第二图像的属性。 根据合格度的值,对运动的DFV进行了验证。 实验表明,基于多个位置处的局部体积变化的计算度量和在多个位置处限定的第一或第二图像的局部属性的一致性度量不一定有利于外力的大重量 提供更准确的注册。 这种观察的一个原因可能是提供更精确对准的大变形通常导致变形,导致不合理地大的体积变化。 包括这种变形的DVF因此更可能被本发明的系统丢弃。