主讲者:悉尼大学 Wen Ling-feng 博士
演讲题目:
功能成像中的参数估计
Parameter Estimation in Functional Imaging
时间:2007年12月26日下午三点
地点:医学院懿德楼101室(东院)
(重庆南路227号)
主办单位:
上海交通大学医学院
上海交通大学Med-X研究院
主要内容:
简要介绍生理动力学建模和一些参数估计方法,如线性、非线性最小二乘法和广义最小二乘法(NLS,LLS,GLLS)。功能成像(如PET和SPECT)是与生理和代谢过程相关的定量参数所形成的参数图像,需要将其依赖的动力学模型逐个图像体素地拟合到机体组织的时间放射性曲线。……
Functional imaging, such as positron emission tomography (PET) and single photon emission computed tomography (SPECT), is capable of identifying subtle functional changes prior to anatomical changes being detectable by anatomical imaging. Parametric images, whose values represent quantitative parameters relevant to physiological or metabolic processes, require the fitting of an underlying kinetic model to voxel-wise tissue time activity curves (TTACs) for a given input function (IF) or reference region. This talk will give a brief summary on physiological kinetic modelling. A number of parameter estimation methods will be presented such as NLS, LLS, GLLS and graphical plots.