| LIU Jian-xin,DENG Gang,YIN Xiao-ming,et al.Importance of automatic tube current technology with mutli-detector CT in chest test[J].Chinese Journal of Radiological Medicine and Protection,2007,27(2):191-192 |
| Importance of automatic tube current technology with mutli-detector CT in chest test |
| Received:February 25, 2006 |
| DOI： |
| KeyWords:CT Automatic tube current technology Radioprotection |
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| Abstract:: |
| Objective To explore the importance of automatic tube current technology of multi-detector CT in chest test. Methods Each group of study and control include 30 cases. The technology of auto tube current(noise index=10.00) and fixed tube current(200 mA) were performed separately. Comparision with image noisiness and detail to show and information of dose was made. Results There is no significant difference(P=0.136,0.289,0.176) between both groups in CT value in the supra-aortic arch,tracheal prominence and supra-diaphragmatic level respectively with no significant difference (P=0.121) of background SD in supra-aortic arch level.There is significant difference(P=0.001,0.000) of background SD in tracheal prominence and supra-diaphragmatic level respectively. There is no significant difference between study and control groups in demonstration of grade and morphology in pulmonary micro-vessels,bronchiole and interlobar fissure etc.Linear artifact was found in both study and control group in supra-aortic arch level,but more slices with artifact and more noise granule in study group. CTDIvol and DLP were about 1/3 of control group. Conclusions Utilization of CT auto tube current can ensure the image quality and reduce the dose of patients. |
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