RT exam in 6 weeks — how did you structure physics vs clinical review?
I'm scheduled to sit the radiation therapist certification exam in about 6 weeks and I'm trying to figure out where to put most of my energy. I've been in clinical for two years so the treatment delivery stuff feels pretty solid, but the physics and math sections are killing me. I scored around 58% on my first practice run and I need at least 75% to feel comfortable going in.
Right now I'm doing about 2 hours a day on weekdays and 4 hours each weekend day. I built a spreadsheet breaking the content outline into 6 domains and weighting my time toward radiation physics (20% of exam) and treatment planning since those are my weakest. Anatomy I'm leaving mostly alone since I consistently score 80%+ there.
Has anyone found good resources specifically for the math side — dose calculations, inverse square law problems, that kind of thing? The ARRT prep materials are decent but I feel like I need more practice problems with actual worked solutions. Any specific books or question banks that clicked for you?
Do a full timed simulation about 10 days before your test date, not 2 days before. That gives you time to patch whatever shows up weak without panicking. I did mine 2 days out and it just made me anxious with no runway to fix anything.
Six weeks is totally doable if you're consistent. I passed with an 82% after 5 weeks of structured study. Don't ignore patient care and safety — a lot of people overlook that domain and it catches them off guard on exam day.
Physics was rough for me too. I ended up spending 3 weeks just on that domain and went from 61% to 79% on practice sets. The key was doing problems daily, not just reading theory. Once you understand why the formulas work, the math problems become way more manageable.
I used the Lange Q&A book alongside official ARRT content. The worked solutions in that book are what saved me for dosimetry calculations. Budget at least 45 minutes per session just on math and don't skip steps when you check your answers.
Honestly, I was in almost the exact same spot at week 6 and I nearly just rescheduled the whole thing. Physics felt like a wall I couldn't get through no matter how many times I read the same chapter. What finally clicked for me was stopping the passive reading and just doing practice questions on repeat, even when I was getting them wrong constantly. The wrong answers taught me more than anything else. I didn't touch a textbook for the last two weeks, it was all question banks and figuring out why I missed what I missed.
If your clinical stuff is already solid, don't waste your remaining time reviewing what you already know just because it feels comfortable. Force yourself into the physics discomfort. Six weeks is actually enough time if you're honest about where the gaps are. I went in feeling like a 60% student and passed, so don't count yourself out yet.
I failed my first attempt and honestly it came down to exactly what you're describing — I spent way too much time reviewing clinical stuff I already knew and basically ignored the physics until it was too late. Second time around I flipped it completely. I did physics every single morning for the first four weeks, just grinding through beam calculations and inverse square law problems until they felt automatic. The clinical review I pushed to the last two weeks because that knowledge wasn't going anywhere.
One thing that actually helped me was doing timed practice sets by domain so I could see where I was bleeding points. I found free rt patient care and management questions online and used those to confirm my clinical knowledge was still solid without wasting hours on it. If you're at 58% with six weeks left you've got time, but don't touch physics lightly — it needs real daily reps, not just a weekend cram. You've got the clinical instincts already. Trust that and go fix the math.
I failed my first attempt by 4 points and physics was exactly where I bled out. What changed for me the second time was stopping trying to understand everything and instead drilling the formulas I kept missing until they were automatic. Inverse square law, MU calculations, isodose stuff — I did timed practice sets every morning for three weeks straight, not reading, just doing problems. It felt tedious but my score went from a 58 to a 72 on that section.
Six weeks is honestly enough time if you're honest with yourself about what's actually weak. You said clinical feels solid, so don't waste hours there just because it's comfortable. I made that mistake the first go-around — kept reviewing treatment delivery because it felt good to get things right. Protect maybe two sessions a week for clinical review to stay sharp, but put the heavy hours into physics and math. Find your three or four worst topics and beat them to death before moving on.