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來源資料
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題名 | 假體對X光空間劑量分布的影響=The Change of X-ray Dose Distribution Due to a Phantom |
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作 者 | 陳拓榮; 游澄清; | 書刊名 | 臺灣應用輻射與同位素雜誌 |
卷期 | 2:3 民95.09 |
頁次 | 頁160-165 |
分類號 | 412.78 |
關鍵詞 | 假體; 曝露; 劑量; 熱發光劑量計; Phantom; Exposure; Dose; TLD; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以假體模擬人體對X光的散射,評估在X光照射時,人體存在對空間劑量分布的影響。結果顯示當有假體時,空間之劑量分布改變甚大,高度在0.8m之層面,TLD所接受的劑量較無假體時減少約18%;而高度在1.3m與1.8m之層面,TLD所接受的曝露較無假體時的曝露分別多了18%與36%。推論當實際有平躺之受照者時,由上往下照之X光曝露分布改變應類似,即人體上方空間的劑量將增加;而人體下方空間的劑量將減少。 |
英文摘要 | A radiographic positioning phantom was adopted to study the changing of dose distribution by the X-ray scattering from the body of the phantom. The result showed that the space dose distribution had a large changing when the phantom was positioned on the table or not. Compared to nothing on the clinical table, the total dose with a phantom that was measured by TLDs decreased 18% at an altitude of 0.8 meter. On the other hand, the doses with a phantom increased 18% and 36% at the altitudes of 1.3 meters and 1.8 meters, respectly. The study expected the changing of dose distribution is similar when the phantom was replaced by an actually person as the x ray beam of exposure is from up to down, The doses will increase on the space between the X-ray tube and exposured body and decrease under the space of the exposured body. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。