| GAN Yun-gen,XUE Guan-ying,LI Yin-tai.Effect of low-dose exposure helix CT scan on image quality for children s hip joint[J].Chinese Journal of Radiological Medicine and Protection,2008,28(5):539-541 |
| Effect of low-dose exposure helix CT scan on image quality for children s hip joint |
| Received:August 29, 2007 |
| DOI： |
| KeyWords:Hip joint Children Helical CT Low-dose |
| FundProject: |
| Author Name | Affiliation | | GAN Yun-gen | Department of Radiology, Shenzhen Children s Hospital, Shenzhen 518026, China | | XUE Guan-ying | Department of Radiology, Shenzhen Children s Hospital, Shenzhen 518026, China | | LI Yin-tai | 郑州大学第一附属医院放射科 | | 向葵 | Department of Radiology, Shenzhen Children s Hospital, Shenzhen 518026, China | | 徐大勇 | Department of Radiology, Shenzhen Children s Hospital, Shenzhen 518026, China |
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| Abstract:: |
| Objective To discuss the effect of reducing the tube current on the images quality in undergoing hip joint CT examination for children. Methods Forty_five patients were divided at random into three groups with different tube currents, namely group with routine dose, groupⅠ aged less than 6 years with low dose and group Ⅱ aged from 6 to 12 with low dose. CT dose index (CTDIvol) and average dose-length produce (DLP) were detected. The image quality of three groups was analyzed by experienced ragiologists with score assessment and t-test. Results The CTDIvol values of three groups were 35.4,15.8 and 17.3 mGy, and those of DLP were 442.75±23.51,197.91±18.46 and 216.01±14.25 mGy·cm, respectively. The percentage of images meeting clinic diagnostic requirement was no significantly different (P＞0.05) in three groups. Conclusion Low dose helix CT scan for childrens hip joint can meet the clinic diagnostic requirement. |
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