RadOnc Smart Review

Welcome back to Rad Onc Smart Review, the podcast that helps you master radiation oncology concepts for your boards and beyond.This is Episode 2a, DNA Repair: Base & Nucleotide Excision.In our last episode, we saw how radiation causes a spectrum of DNA damage. Today, we'll start exploring how the cell fights back, focusing on two crucial repair pathways: Base Excision Repair for smaller lesions and Nucleotide Excision Repair for bulkier damage.

Welcome back to Rad Onc Smart Review, the podcast that helps you master radiation oncology concepts for your boards and beyond.This is Episode 1, Radiation Interaction & Damage Basics.Today, we’ll explore how ionizing radiation initially interacts with cells, focusing on direct versus indirect effects, and the different types of damage caused to our primary target, DNA.

Welcome back to the RadOnc Smart Review Physics Series for our concluding episode! In P16b, we explored the crucial planning modalities of CT and MRI. Today, in Episode P16c: PET & Ultrasound Physics for RadOnc, we round out our imaging tour by looking at two other important technologies: Positron Emission Tomography (PET), which gives us insights into metabolic function, and Ultrasound (US), often used for real-time guidance and visualizing certain structures.

Welcome back to the RadOnc Smart Review Physics Series! In P16a, we covered the crucial principles of radiation protection and the regulations governing our field. Now, in Episode P16b: CT & MRI Physics for RadOnc, we dive into the physics behind the two imaging modalities most fundamental to treatment planning: Computed Tomography (CT) and Magnetic Resonance Imaging (MRI). How do they create the detailed anatomical images we rely on every day?

Welcome back to the RadOnc Smart Review Physics Series! We've explored how radiation is produced, how it interacts, how we measure it, plan treatments, and ensure quality. Now, we circle back to a fundamental responsibility: radiation safety. In Episode P16a: Radiation Protection & Regulations, we'll review the types of radiation effects, the quantities used to measure risk (Dose Equivalent, Effective Dose), the ALARA principle, the critical regulatory dose limits for workers and the public, and touch upon managing dose from internal radioactivity.

Welcome back to the RadOnc Smart Review Physics Series! In P15a, we covered brachytherapy sources and TG-43 dose calculations. In P15b, we looked at clinical applications and planning systems. Now, in our final brachytherapy episode, P15c: Brachytherapy QA, Safety & Regulations, we focus on arguably the most critical aspect: ensuring these procedures are performed safely and accurately, protecting both patients and staff, and complying with strict regulatory requirements.

Welcome back to the RadOnc Smart Review Physics Series! In P15a, we laid the groundwork for brachytherapy, focusing on the radioactive sources, how their strength is quantified using Air Kerma Strength (SK), and the details of the TG-43 dose calculation formalism. Now, in Episode P15b: Brachytherapy Applications, Systems & Planning Concepts, we'll explore how these sources are actually used clinically – looking at intracavitary vs interstitial techniques, historical planning systems, and specific dose points like ICRU 38's Points A and B.

Welcome back to the RadOnc Smart Review Physics Series! We've thoroughly covered external beam therapy. Now, we're shifting gears dramatically to explore treatments where the radiation source is placed inside or very close to the target. In Episode P15a: Brachytherapy Physics - Sources, Strength & Dose Calculation, we'll introduce the common radioactive isotopes used, discuss how their strength is properly quantified, and meticulously break down the fundamental TG-43 formalism used for calculating dose around these sources.

Welcome back to the RadOnc Smart Review Physics Series! In P14a, we explored the world of electron beams. Now, in Episode P14b: Proton Therapy Physics & Planning, we turn to the heavyweights: protons. Protons offer a unique dose deposition pattern, the Bragg peak, which allows for potentially superior sparing of normal tissues distal to the target. We'll delve into the physics behind proton interactions, how clinical beams are created, the critical challenge of range uncertainty, and specific planning considerations.

Welcome back to the RadOnc Smart Review Physics Series! After exploring advanced photon techniques like IMRT, VMAT, and SRS/SBRT, we're now switching particle types. In Episode P14a: Electron Beam Physics & Planning, we focus entirely on the clinical workhorse for treating shallow targets: the electron beam. We'll examine its unique depth dose characteristics, how its shape changes with depth, planning considerations, and clinical uses.