第一讲概论目录第一讲概论....................................................................................................................................1一、CT简介..............................................................................................................................21.1什么是CT....................................................................................................................21.2CT设备的构成............................................................................................................31.3CT分类及部分性能指标............................................................................................41.4CT成像的特点............................................................................................................51.5CT应用领域................................................................................................................61.6CT发展简史................................................................................................................91.7检测成像工程中心简史...........................................................................................13二、X射线成像物理学..........................................................................................................202.1X射线的产生............................................................................................................202.2X射线与物质相互作用............................................................................................21三、CT成像的数学模型........................................................................................................243.1Beer定律..................................................................................................................243.2CT成像的连续数学模型..........................................................................................253.3CT成像的离散数学模型..........................................................................................27四、附录................................................................................................................................284.1CT图书.....................................................................................................................284.2CT杂志.....................................................................................................................294.3CT会议.....................................................................................................................314.4在线资源..................................................................................................................32一、CT简介1.1什么是CTCT是ComputerizedTomography或ComputedTomography的缩写。“C”就是“计算机化的”或是“计算的”。我们看“T”或“Tomography”。Tomography=tomos(slice,section)+graphein(draw)所以，“Tomography”就是对断层进行绘图（成像）。Tomography是内视技术，即不打开物体就能看到物体内部的结构。具体的讲：目标：希望得到被测物体内部物理量B的分布。信息获取：用探测器探测一组物理量A。信息处理：根据物理量A与物理量B之间的物理关系A=F(B)，求解出物理量B的分布。CT就是计算机断层成像。广义上讲，以下技术均属于计算机断层成像技术：X射线（γ射线）断层成像技术（即狭义CT）激光CT成像（OpticalComputerTomography）核磁共振断层成像技术（MagneticResonanceImaging,MRI）超声成像技术...