利用自製均質壓克力假體與熱發光劑量計評量心導管冠狀動脈診斷時之有效劑量值

To evaluate the Effective Dose for Percutaneous Coronary Intervention by an indigenous PMMA phantom and TLD Technique

王一婷(I-Ting Wang)

指導教授 ： 潘榕光

中臺科技大學/健康科學院/放射科學研究所/碩士(2010年)

摘要

心導管介入性診療中針對較複雜性冠狀動脈病變的病患，往往需要很長的診斷和治療時間，加上整個過程中必須藉由X光機的透視輔助才得以完成，以至於病患接受長時間X光照射可能造成的輻射傷害，常常被醫生和病患所忽略。本研究以熱發光劑量計佈點於自製30、50和70 kg的壓克力假體來代替病患接受介入性心導管X光照射，分別照射70、140、210與280 秒分析病患在診斷的過程中所接受到的有效劑量值，並針對其有效劑量值與假體的BMI值、照射時間以及皮膚劑量之間的關係利用Mathematica數學軟體來做更進一步的探討。經由個別照射自製壓克力假體70、140、210 與280秒， 其30 kg 的有效劑量值為316.12±17.78 μSv 、443.92±21.07 μSv 、668.68±25.86 μSv 和1028.79±32.07 μSv ； 50 kg 的有效劑量值分別為
475.97±21.82 μSv、806.24±28.39 μSv、1077.18±32.82 μSv和1693.87±41.16μSv，70kg有效劑量值為312.53±17.68 μSv、845.52±29.08 μSv、904.98±30.08μSv 和1648.01±40.60 μSv。以標準的成人170 公分、70 公斤為例，經由BMI值、照射時間和皮膚劑量關係式可以得知病人接受輻射暴露時間一小時皮膚所接受到的劑量約為1.12 Gy，低於1 Gy的劑量照射時間需少於50 分鐘，建議的限制範圍比美國FDA所提出的暴露時間建議值一小時還要更嚴謹。

關鍵字

自製壓克力假體 ； Mathematica數學軟體 ； 心導管介入性診療 ； 熱發光劑量計

並列摘要

Percutaneous Coronary Intervention in the clinic for more complex coronary artery disease patients, often takes a long time for diagnosis and treatment, together with the whole process must by X-ray machine was able to complete secondary perspective, so that patients for long-term X-ray radiation exposure can cause harm, are often ignored by doctors and patients. In this study,the TLD distribution in the 30, 50 and 70 kg PMMA phantom replace the patients underwent interventional cardiac catheterization X-ray irradiation, respectively, exposure 70,140,210 and 280 seconds. In the diagnosis process of
the received value of the effective dose and BMI, exposure time and skin dose using Mathematical software to do further investigation. The derived effective doses for 30kg phantom were 316.12±17.78 μSv 、443.92±21.07 μSv 、
668.68±25.86 μSv and 1028.79±32.07 μSv whereas the effective doses for 50kg phantom were 475.97±21.82μSv、806.24±28.39μSv、1077.18±32.82μSv and 1693.87±41.16μSv, whereas the effective doses for 70kg phantom were
312.53±17.68μSv、845.52±29.08μSv、904.98±30.08μSv and 1648.01±40.60μSv, respectively under 70s, 140s, 210s, and 280s exposure times.

並列關鍵字

PMMA phantom ； TLD ； Percutaneous Coronary Intervention

參考文獻

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