Comparison of 2D Radiographic Images and 3D Cone Beam Computed Tomography for Positioning Head-and-Neck Radiotherapy Patients
- 作者：Heng Li ; X. Ronald Zhu ; Lifei Zhang ; Lei Dong ; Sam Tung ; Anesa Ahamad ; K. S. Clifford Chao ; William H. Morrison ; David I. Rosenthal ; David L. Schwartz ; Radhe Mohan ; Adam S. Garden
- 关键词：Cone beam CT ; Head-and-neck cancer ; Positioning accuracy
- 刊名：International Journal of Radiation Oncology*Biology*Physics
- 出版年：2008
- 期刊代码：136_03603016
- 类别：med
- 出版时间：1 July 2008
- 卷：71
- 期：3
- 页码：916-925
- 文件大小：680 K
摘要
The dome-covered house is an example of designing buildings by learning from the optimized biological forms from the nature in order to reduce the energy use for heating in cold climates. This paper presents the three-dimensional thermal and airflow (3D-TAF) model that predicts the impact of such dome on the heating load of the protected house. The emphasis is on the airflow model, the formulation of the system of equations, the calculation procedure, and the comparison with a CFD model. A case study of a dome located in Montreal (Canada) is presented. A linear correlation model is developed that predicts the variation of the dimensionless air temperature inside the dome with the dimensionless height.