Lazar the RTR

Lazar the RTR Created by Lazar Lazarovski R.T.(R)

Every X-ray student standing next to you is going to be someone's coworker in a year or two.Maybe even YOURS!That idea c...
08/27/2026

Every X-ray student standing next to you is going to be someone's coworker in a year or two.

Maybe even YOURS!

That idea came up in my new Rad Tech Life Podcast episode with Justice Talbot, an X-ray Program Director and the winner of the ARRT® 2026 “I Am the Gold Standard” Educator Award.
Justice believes clinicals should be the safest place a student will ever get to fail.

Why?

Because right now, they have YOU to shape them.
So instead of teaching students to stand in the corner until they’re sure they can get it right, what if we taught them:

1. To try without any pressure...
2. To think critically...
3. To make mistakes (without making an exposure), learn from those mistakes, and try again?

We also talk about getting rid of the “eat your young” mentality and what technologists can do to help create the kind of coworkers we actually WANT to work with.

If you work with X-ray students, I think you’ll enjoy this one 😉
Watch or listen here → https://youtu.be/fMtG-rL9A8c

Until then, train them up in the way they should go!
(Proverbs 22:6)

☢️If you’re an x-ray student trying to survive radiography school a...

Radiobiology | ARRT® Registry QuestionWhich THREE of the following characteristics increase cellular radiosensitivity? (...
08/21/2026

Radiobiology | ARRT® Registry Question

Which THREE of the following characteristics increase cellular radiosensitivity? (Select three)

A. high mitotic activity
B. lack of undifferentiation
C. high metabolic activity
D. mature specialization
E. lack of differentiation

Explain your answer. Visit www.youtube/ for free lessons and registry style exams!

A reference radiation requires 20 Gy to produce a specific biological response. A test radiation requires 2 Gy to produc...
08/21/2026

A reference radiation requires 20 Gy to produce a specific biological response. A test radiation requires 2 Gy to produce the same response. What is the relative biologic effectiveness (RBE) of the test radiation?

A. 0.1
B. 2
C. 10
D. 20

Radiobiology | ARRT® Registry Question 🤔❓Which of the following changes is generally expected as linear energy transfer ...
08/20/2026

Radiobiology | ARRT® Registry Question 🤔❓

Which of the following changes is generally expected as linear energy transfer (LET) increases?

A. RBE decreases
B. RBE increases
C. ionization becomes more widely spaced
D. biological damage becomes easier to repair

Explain your answer. Visit youtube/ for free lessons.

Radiobiology | ARRT® Registry Question 🤔❓A reference radiation requires 20 Gy to produce a specific biological response....
08/20/2026

Radiobiology | ARRT® Registry Question 🤔❓

A reference radiation requires 20 Gy to produce a specific biological response. A test radiation requires 2 Gy to produce the same response. What is the relative biologic effectiveness (RBE) of the test radiation?

A. 0.1
B. 2
C. 10
D. 20

Explain your answer. Visit www.youtube/ for free lessons.

Radiobiology | ARRT® Registry Question 🤔❓Which TWO of the following characteristics are associated with deterministic ra...
08/20/2026

Radiobiology | ARRT® Registry Question 🤔❓

Which TWO of the following characteristics are associated with deterministic radiation effects? (Select two)

A. a threshold dose is present
B. probability alone increases with dose
C. severity increases as dose increases above the threshold
D. biological effects may occur beginning at zero dose

Explain your answer. Visit youtube/LazarTheRTR for free lessons.

Radiobiology | ARRT® Registry Style Question A dose-response curve shows no observable response at low doses. After a sp...
08/20/2026

Radiobiology | ARRT® Registry Style Question

A dose-response curve shows no observable response at low doses. After a specific dose is reached, the response rises rapidly and eventually levels off. Which of the following relationships is demonstrated?

A. linear nonthreshold
B. nonlinear threshold
C. linear threshold
D. nonlinear nonthreshold

Explain your answer. Visit youtube/ for free lessons.

Radiobiology | ARRT® Registry Style QuestionA dose-response graph begins at zero dose and rises in a straight line. Whic...
08/20/2026

Radiobiology | ARRT® Registry Style Question

A dose-response graph begins at zero dose and rises in a straight line. Which of the following relationships does the graph demonstrate?

A. linear threshold
B. nonlinear threshold
C. linear nonthreshold
D. nonlinear nonthreshold

Explain your answer. Visit youtube/ for free lessons.

🎸 What if you could study x-ray production without feeling like you're studying?I turned x-ray production into a 4-minut...
08/20/2026

🎸 What if you could study x-ray production without feeling like you're studying?

I turned x-ray production into a 4-minute song so you can learn while you jam out. 😂

Give it a listen and see how much you remember afterward.

👇 X-RAY BEAM SONG

https://www.youtube.com/watch?v=1DgmrYhZG7U

NEW Lesson covering the following 👇✅Dose-response relationships✅Relative Tissue Sensitivities✅LET vs. RBE✅Linear vs. Non...
08/19/2026

NEW Lesson covering the following 👇

✅Dose-response relationships
✅Relative Tissue Sensitivities
✅LET vs. RBE
✅Linear vs. Non-Linear (Threshold, Non-Threshold)
✅Cell survival and LD50
✅The oxygen effect (OER)
✅The Law of Bergonié and Tribondeau (There's a SURPRISE scene at the 19:04 minute mark of the video)

I break it all down in my newest lesson my YouTube channel :

https://www.youtube.com/watch?v=ZyQArHHk0Bs

Enjoy! 🍿

In-depth Radiobiology Lesson on Radiosensitivity including Dose-Res...

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