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| Estimation of Dual-Source CT Effective Dose |
| WANG Qiang, FU Qiang, LIN Lin, ZHU Jian-quan |
| Changzhou CDC, Changzhou, 213022 China |
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Abstract Objective To estimate dual-source CT effective doses under four different examination protocols.Methods After putting TLDs in the Alderson Radiation Therapy Phantom,we scanned the phantom under two different examination protocols.Then effective doses were calculated with the acquired absorbed doses of organs and tissues. Tissue weighting factors recommended by the ICRP were adopted in the calculation. Effective doses were also calculated using the AAPM recommended method by which the DLP was multiplied by the K factor.Results Effective doses under two different examination protocols were obtained.The effective doses were 3.66 and 2.98mSv respectively when phantom were used. The effective doses were 2.81 and 1.55 mSv respectively calculated using the K value recommended by AAPM and were all lower than that obtained using phantom.Conclusion Under the head scan mode,the absorbed dose of crystalline lens is high.Effective doses calculated using the method recommended by AAPM were lower than those using the Alderson Radiation Therapy Phantom.
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Received: 23 August 2016
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