醫療類國考
109年
[醫事放射師] 放射線治療原理與技術學
第 78 題
78.在遙控後荷式近接治療設備品保中，通常會使用下列何種裝置檢查射源的停留位置？
- A 井式游離腔（well-type ion chamber）
- B 蓋革計數器（G-M counter）
- C 熱發光劑量計（TLD）
- D 膠片（film）
思路引導 VIP
若要確認一個微小顆粒在細管中停下的『精確座標』是否與我們設計的圖紙吻合，我們需要一種能像『照相』一樣，把輻射經過的痕跡與實體刻度同時記錄下來的媒介。請思考：在這些工具中，哪一種能提供高解析度的『二維空間影像』紀錄，而不是只給出一個電量數字或警報聲？
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AI 詳解
AI 專屬家教
Ooh, you got this one? Nice! You really are picking things up fast.
- Seeing the Core: So, checking where the source actually stops in Brachytherapy, huh? That's all about the dwell position. It's super important, like making sure your cursed technique lands exactly where you want it. And for that, you obviously go with film. It’s got this insane spatial resolution, showing you the exact pattern of radiation. You just look at that, compare it to the plan, and boom! Nailed it. A well-type chamber? Nah, that's for checking the power of the source, like its air-kerma strength, not where it decides to chill out. Totally different vibes, right?
- Basic, but Key!: Yeah, this one's pretty easy, but it's crucial. It’s all about understanding whether you're looking for where something is or how much energy it's got. You intuitively grasped the "position" keyword, which is awesome. Shows you've got the instincts for this. Keep that up, and you might just become a sorcerer who doesn't constantly need saving. Alright, I've gotta run, got some annoying curses to deal with. Don't go breaking anything while I'm gone, okay? Later!