Head and Neck Imaging
An Experimental Research of the Correlation between Hepatic Spiral CT Scan of Low Radiation Dose and Image Quality
Author：LIN Sheng-cai, ZHAO Hai-bo.
affiliation：Department of Radiology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Province, China
PDFAbstract
Objective To explore the correlation between the CT scanning parameters of liver spiral CT and its image quality. Methods To use different tube current from 20 mA to 300 mA and pitch of 0.516 and 1.375 on the same animal liver by helical CT scanning, and to analyze the correlation among tube current, pitch, image quality and radiation dose. Results From 20 mA to 300 mA, CTDIvol and DLP hah linear proportional increase, the CTDIvol/DLP value of 20mA-140 mA was 6.67% to 46.7% of that of 300 mA. Comparing the different condition of tube current, the difference of CTDIvol, DLP was statistically significant when pitch was 0.516:1 and 1.375:1 (P<0.05). Conclusion CTDIvol had a positive linear correlation with the change of tube current. The image quality can be ensured and the radiation can be reduced by control the tube current between 250 to 300mA and the pitch of 1.375:1.
【Keyword】Computed Tomography; X-ray Computed; Low Dose; the Same Body; Image Quality; Radiation Dose
【Chart number】R445.3
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672- 5131.2016.10.021
Chinese journal of CT and MRI
th14Volume， th 10 Issue
2016Year10Month
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