Effect of CT scanning parameters on CT number
10.3760/cma.j.issn.0254-5098.2010.01.026
- VernacularTitle:CT扫描参数对人体组织CT值影响的研究
- Author:
Wenxian PENG
;
Tianzhou PENG
;
Xiaoqin YE
;
Yimou FU
;
Huiping PAN
;
Yuantong GAO
;
Guangbo JIN
- Publication Type:Journal Article
- Keywords:
CT number;
X-Ray tube voltage;
Scan parameter;
Relativity
- From:
Chinese Journal of Radiological Medicine and Protection
2010;30(1):79-81
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effects on tissue CT number caused by scan protocols.Methods The phantom was repeatedly scanned in different protocols by changing only one of parameters,such as X-ray tube voltage,mAs and recon kernel,while other parameters were ketp unchanged.The CT number of different materials in phantom were measured and analyzed.Results The CT numbers of tissues changed remarkably with the tube voltage and had different relativity for different tissues.The CT numbers had positive correlation with kV for such maierials as polyethyle,lexan,perspex,but for teflon the correlation was negative.The mAs and recon kernel had no effects on CT number.Conclusions The CT number of tissue changes with scanning X-ray tube voltage,so the setting of scan parameters should be taken into account in image diagnosis and radiotherapy.
