| LI Jian-ming,XU Wen-biao,LUO Yuan-li,et al.Application of automatic tube current modulation with 64-detector CT in infant brain[J].Chinese Journal of Radiological Medicine and Protection,2010,30(2):222-224 |
| Application of automatic tube current modulation with 64-detector CT in infant brain |
| Received:June 08, 2009 |
| DOI： |
| KeyWords:Automatic tube current modulation Infant Brain Low dose |
| FundProject: |
| Author Name | Affiliation | | LI Jian-ming | Department of Radiology, Guangzhou Children's Hospital, Guangdong Province, Guangzhou 510120, China | | XU Wen-biao | Department of Radiology, Guangzhou Children's Hospital, Guangdong Province, Guangzhou 510120, China | | LUO Yuan-li | Department of Radiology, Guangzhou Children's Hospital, Guangdong Province, Guangzhou 510120, China | | LIU Hong-sheng | Department of Radiology, Guangzhou Children's Hospital, Guangdong Province, Guangzhou 510120, China | | ZHOU Ning | Department of Radiology, Guangzhou Children's Hospital, Guangdong Province, Guangzhou 510120, China |
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| Abstract:: |
| Objective To evaluate the effect of automatic tube current modulation on imaging quality and lesion revealed in infant brain.Methods The infant patients of 200 cases were divided into four groups according to the values of SD(2.5, 2.75, 3.0, 4.0), 50 cases in each group. They were performed with the automatic tube current modulation scanning in brain. The imaging quality and radiation dose were analyzed.Results When the values of SD were 2.5, 2.75, 3.0 and 4.0, the high values of CTDIvol were 60.0, 49.8, 42.9 and 25.8 mGy, respectively. The effective doses were (3.27±1.01), (2.78±0.85), (2.40±0.74) and (1.49±0.45) mSv·mGy-1·cm-1, respectively. There was significant difference among those groups (F =48.99, P＜0.05). The excellent imaging qualities were 100%, 96%, 70% and 20%. 12 cases were neonate in SD 2.5 group. In SD 2.75 group, the imaging quality of neonate(2 cases)were all fine. In SD 3.0 group, the imaging quality was not ideal for the ages less than 1 year. In SD 4.0 group, when the infants aged over 2 years and 6 months, or with the larger head circumference, their imaging quality were all excellent.Conclusions The individual application of ATCM could obtain the best balance among imaging quality, radiation dose and diagnostic quality. The SD 2.5, 2.75, 3.0 and 4.0 might be suitable to infants of newborn, 1 month to 1 year old, 1 to 3 years, the larger head circumference and part of the reviewed cases. |
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