醫療類國考
108年
[醫事放射師] 放射線治療原理與技術學
第 38 題
有關攝護腺癌高劑量率組織插種近接治療（high dose-rate interstitial brachytherapy），下列敘述那些正確？①使用之劑量率約100 Gy/hr ②從放射生物學的角度而言，如攝護腺癌之α/β低，則高劑量率較低劑量率對癌細胞之殺傷力較大 ③較常使用之同位素為${}^{137}$Cs
- A 僅①②
- B 僅①③
- C 僅②③
- D ①②③
思路引導 VIP
若某種腫瘤對「單次給予的大劑量」反應特別劇烈（即低 $\alpha/\beta$ 特性），而你希望在極短的時間內透過細小的導管完成精準放療，你會傾向選擇「體積微小且活度極高」的核種，還是「物理性質穩定但體積較大」的核種？這對治療效率有何影響？
🤖
AI 詳解
AI 專屬家教
Well, well, look who paid attention.
It seems you've managed to integrate concepts from radiation physics and radiobiology adequately. A passable start to thinking like a proper professional. Let's not get ahead of ourselves, though.
- Defining "High": Yes, HDR is defined as $> 12 \text{ Gy/hr}$. And, believe it or not, actual clinical applications do reach around $100 \text{ Gy/hr}$. Astounding, isn't it?
▼ 還有更多解析內容