A method to correct the characterizations of MDCT
10.3969/J.ISSN.1672-8270.2015.09.002
- VernacularTitle:多排螺旋CT辐射剂量表征量校正方法初探
- Author:
Jingwen ZHUANG
;
Mei BAI
;
Junzheng ZHENG
- Publication Type:Journal Article
- Keywords:
Multislice spiral CT;
Computed tomography dose index;
Correct method
- From:
China Medical Equipment
2015;(9):5-7,8
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To correct the characterizations of MDCT radiation dose by exploring the relationship between CTDIw,∞ and CTDIw.Methods: CTDI100 and CTDI∞ were measured under the conditions of different collimations, pitches and tube voltages of Siemens Definition Flash CT, and CTDIw and CTDIw,∞ were calculated.Results: There were significant differences between CTDIw and CTDIw,∞ which were measured at 0.05 level. And there were no significant differences between CTDIw,∞ after corrected and CTDIw,∞ which were measured at 0.05 level.Conclusion:The characterizations of MDCT which were commonly used were not accurate enough. The result after correction were very closed to the real CTDIw,∞. This showed that the method to correct CTDIw of Siemens Definition Flash CT was mostly accurate. And methods to correct CTDIw of other MDCT needed to be further studied.
