| PENG Wen-xian,PENG Tian-zhou,YE Xiao-qin,et al.Effect of CT scanning parameters on CT number[J].Chinese Journal of Radiological Medicine and Protection,2010,30(1):79-81 |
| Effect of CT scanning parameters on CT number |
| Received:June 28, 2009 |
| DOI： |
| KeyWords:CT number X-Ray tube voltage Scan parameter Relativity |
| FundProject:温州市科技局基金资助(Y20080078) |
| Author Name | Affiliation | | PENG Wen-xian | Rui'an People Hospital, Rui'an 325200, China | | PENG Tian-zhou | Rui'an People Hospital, Rui'an 325200, China | | YE Xiao-qin | Rui'an People Hospital, Rui'an 325200, China | | FU Yi-mou | Rui'an People Hospital, Rui'an 325200, China | | PAN Hui-ping | Rui'an People Hospital, Rui'an 325200, China | | GAO Yuan-tong | Rui'an People Hospital, Rui'an 325200, China | | JIN Guang-bo | Rui'an People Hospital, Rui'an 325200, China |
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| 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. |
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