Title: Radiation Dose Reduction At a Price:The Effectiveness of a Thyroid Shield During Head CT Scanning.
Abstract:Objective To assess radiation dose to the thyroid in patients undergoing head CT scanning and to evaluate dose reduction to the thyroid by load shielding.Methods A post-morterm was scanned by differen...Objective To assess radiation dose to the thyroid in patients undergoing head CT scanning and to evaluate dose reduction to the thyroid by load shielding.Methods A post-morterm was scanned by different model and study was undertaken to evaluate the dose reduction by thyroid lead shields and assess their practicality in a clinical setting.(a)No thyroid shields and(b)thyroid shield.One thermoluminescent dosimeters(TLDs)were placed over the thyroid gland center,A thyroid lead shield(Pb eq 0.5mm)was placed around the neck of post-morterm.Scan parameter 、CTDIw and DLP were recorded.Results(a)0.207mSv;(b)0.085mSv.A mean effective radiation dose reduction of 58% was seen in the shielded versus the unshielded.Conclusion Thyroid exposure to scattered radiation from head CT scanning only once is associated with a low but not negligible risk of cancer,but accumulatived doses to the thyroid are serious,highlighting the need for increased awareness of patient radiation protection.Thyroid lead shielding yields significant radiation protection,which should be used routinely during head CT scan.Read More
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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