冠狀動脈電腦斷層攝影檢查臨床輻射劑量之探討

國人利用多層切面電腦斷層掃描儀，進行冠狀動脈掃描已行之有年。隨著儀器之精進，此類檢查確診率提升，已然成為不可或缺的診斷工具。為了提昇影像之品質，增加掃描張數造成病患接受過多輻射曝露，造成心臟或鄰近組織器官的輻射劑量，實值得深入探討。本文採用奇異GE 64切電腦斷層掃描儀（LightSpeed），以Rando人形假體及熱發光劑量計TLD 100，進行評估臨床實際掃描時所各重要組織器官所接受之輻射劑量，包括體內有效劑量。實際執行電腦斷層冠狀動脈血管攝影掃描時，基於輻射防護考量，仍需將產生之劑量列入實驗考量。結果16切與64切電腦斷層冠狀動脈攝影，心臟等價劑量為60.01和70.02 mSv，肺為49.75 和59.21 mSv，甲狀腺為3.56和3.96 mSv，肝臟為20.30和23.70 mSv，胃為14.70和16.50 mSv，食道為18.60和21.10 mSv，全身有效劑量分別為12.86mSv和15.02mSv。

關鍵字

冠狀動脈；多切電腦斷層掃描儀；熱發光劑量計

並列摘要

Multi-slice computer tomography (MSCT) has been the standard method to scan coronary arteries. The diagnosis rate of this examination has increased and has become an essential tool for diagnosis as the technology has matured. Scanned pages are increased to enhance image quality and cause overexposure to radiation for patients to produce radiation dosage in the heart, surrounding tissues, and organs. This overexposure to radiation is worthy of profound discussion. This study adopted GE 64-slice computer tomography (LightSpeed) and used Rando phantom and thermoluminescent dosimeter TLD 100 to assess the radiation dosage received by the vital tissues and organs required for clinical scanning, including effective doses in vivo. When actually implementing computer tomography coronary angiography scanning, it is still necessary to take the dose of radiation into consideration to be able to protect against. The results of 16-slice and 64-slice computer tomography angiography have indicated that the equivalent dose of the heart were 60.01 and 70.02 mSv, the lungs were 49.75 and 59.21 mSv, the thyroid gland 3.56 and 3.96 mSv, the liver 20.30 and 23.70 mSv, the stomach 14.70 and 16.50 mSv, the esophagus 18.60 and 21.10 mSv, and the effective dose of the entire body were 12.86 mSv and 15.02 mSv.

並列關鍵字

coronary artery ； multi-slice computer tomography ； thermoluminescent dosimeter

國際替代計量

冠狀動脈電腦斷層攝影檢查臨床輻射劑量之探討

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