Measurement of CT Hounsfield Units and relative stopping powers conversion curve in proton and carbon ion therapy

VernacularTitle:质子和碳离子治疗中CT值与相对阻止本领转换曲线的测量
Author: Yinxiangzi SHENG ¹ ; Weiwei WANG ; Zhijie HUANG ; Jingfang ZHAO ; Hsi Chien WEN ; Shahnazi KAMBIZ
Author Information

1. 201321,上海市质子重离子医院放射物理科
Keywords: CT value; Relative stopping power; Ion therapy
From: Chinese Journal of Radiological Medicine and Protection 2017;37(9):667-670
CountryChina
Language:Chinese
Abstract: Objective To measure the CT Hounsfield Unit ( HU) and relative stopping power ( RSP) conversion curve. Methods In this study, the RSPs of 12 different tissue equivalent rods were measured with proton and carbon beam in the Shanghai Proton and Heavy Ion Center ( SPHIC) . The same tissue equivalent materials were scanned with CT scanner to acquire the HU. Results Conversion curve for the transformation of HU into RSP was generated for both proton and carbon ion beam. Differences between RSPs measured using proton and carbon beam were ≤0. 64%except lung material. Conclusions A RSP versus HU conversion curve was generated for both protons and carbon ions.