Season 5 | Episode 21 | Dr. Amarilys Velez, D.B.A., R.T. (R) (ARRT®) | Program Director of Radiologic Technology at Kaiser University

🎙️ In this episode of the RadTechLife Podcast, I sit down with Amarilys Velez, Program Director at Keiser University, to dive deep into some of the most challenging topics in radiologic science—dose-response relationships, tissue radiosensitivity, LD50, and the oxygen effect.

We start by unpacking what a dose-response relationship really means in radiation biology, and why understanding the difference between deterministic and stochastic effects is critical for every radiologic technologist. Amarilys also breaks down how linear and nonlinear dose-response curves guide our approach to patient safety, and what thresholds we must always keep in mind to minimize risk.

We explore which tissues and organs are the most radiosensitive, and Amarilys explains complex concepts like LET (Linear Energy Transfer) and RBE (Relative Biological Effectiveness) in a way that’s easy to understand—and crucial for clinical practice. We also talk about how different types of radiation (think alpha particles vs. X-rays) impact tissue differently, and how we can use this knowledge to optimize imaging while protecting our patients.

Then, we shift gears into cell survival and recovery, discussing LD50, how human cells respond to radiation exposure, and what factors influence whether cells repair themselves—or don’t. Amarilys shares insights into accidental overexposures, real-world treatment implications, and even ties in personal experiences that make this discussion incredibly relatable.

Finally, we dive into the oxygen effect—what it is, why oxygenated tissues are more radiosensitive, and how understanding this principle enhances both radiation therapy and diagnostic imaging.

This conversation isn't just technical—it’s full of practical advice, clinical applications, and Amarilys’ passion for mentoring the next generation of technologists.

If you're a student, educator, or working technologist looking to sharpen your knowledge of radiation biology and patient care, this is an episode you won't want to miss!

🎧 Listen now!

#RadiologicTechnology #RadTechLife #RadiationBiology #XrayTech #ARRT #MedicalImaging #PatientCare #RadiographyStudents #HealthcareEducation

Disclaimer

AMERICAN REGISTRY OF RADIOLOGIC TECHNOLOGISTS® and ARRT® are registered trademarks owned by The American Registry of Radiologic Technologists.

The Rad Tech Life Podcast is not licensed by, endorsed by, or affiliated with The American Registry of Radiologic Technologists®