RadOnc Smart Review

Welcome back to Rad Onc Smart Review, G.I. Oncology Edition. This is Episode 01: GI Principles: Re-RT, Toxicity, & Contouring Rare Sites.Before we dive deep into specific GI malignancies, we’re going to build a strong foundation. This episode covers four high-yield topics that cut across multiple disease sites: re-irradiation of the pelvis, management of chronic radiation proctitis, contouring inguinal nodes, and treating adrenal metastases. Mastering these principles will set you up for success throughout our entire GI series.

Welcome back to Rad Onc Smart Review! This is Episode 39C in our special series on Radiobiology Calculations. Today, we’re tackling the mathematics that underpins the very foundation of modern radiation therapy: fractionation. Why do we give many small doses of radiation instead of one big one? The answer lies in the numbers, and mastering these calculations is essential for both your board exams and for safe, effective clinical practice.

Welcome back to Rad Onc Smart Review! This is Episode 39B, the second installment of our special series on Radiobiology Calculations. Today, our focus is on Tumor Control & Kinetics. In our last episode, we mastered the calculations for cell survival on a microscopic level. Now, we're scaling up to the macroscopic world of clinical tumors. We'll start by calculating the massive radiation doses required to eradicate billions of tumor cells, connecting this to the concept of Tumor Control Probability, or TCP. We'll then shift gears to explore the dynamics of tumor growth, learning how to relate a tumor's change in size to its underlying cell doublings and how factors like cell loss influence its growth rate.

Welcome back to Rad Onc Smart Review! This is Episode 39A, and the first in our special series on Radiobiology Calculations. In this episode, Calculations 1: Quantifying Cell Survival, we're moving beyond concepts and getting our hands dirty with the numbers. We'll start with the foundational laboratory data from clonogenic assays and walk step-by-step through calculating Plating Efficiency and Surviving Fraction. Then, we'll master how to apply the Linear-Quadratic model for both acute and low-dose-rate exposures, touch on the classic Target Theory model, and finish with the essential conversion between D₀ and D₁₀.

Today, we're doing a rapid-fire, high-yield review of the absolute must-know concepts, formulas, and numbers for your board exams. We'll move quickly through seven key domains, from fundamental physics to advanced modalities and safety guidelines. Let's begin.

Welcome back to our deep dive on the core principles of radiation physics. This is Part B of our comprehensive physics review. In Part A, we built the foundation, exploring everything from the atom and radioactive decay to the complex machines that generate our clinical beams.Exactly. We covered the "what" of radiation. Now, in this episode, we're going to cover the "how." We'll see how we measure, plan, and deliver dose with these beams. We'll get into dosimetry, M.U. calculations, advanced techniques like I.M.R.T. and V mat, and wrap up with crucial concepts in imaging and safety.

Part 2 of physics overview

Physics overview touching a little of every topic...work in progress.

This is our final episode focused purely on calculations! We've journeyed from basic decay to complex Monitor Unit calculations. Today, we hit the advanced scenarios: What happens when the beam hits lung or bone? How do we compare radically different fractionation schemes biologically? How does modern brachytherapy dosimetry really work with TG 43? And finally, the essential math for keeping everyone safe from radiation. Today, we’re calculating radiological path length, BED and EQD 2, applying the TG 43 framework with Air Kerma Strength, and ensuring our shielding calculations meet regulatory limits.

Welcome back to Radiation Oncology Smart Review – Calculation Toolkit Episode 17C: Dose Divers and Electron Escapades. Last time, we calibrated our detectors and nailed Monitor Unit calculations for standard setups. Now, we follow the dose after it leaves the machine head. Today, we'll master transferring dose between different depths using Percent Depth Doses and Tissue Maximum Ratios, untangle the geometric puzzles of skin gaps for field matching, learn the simple scaling rules for field sizes, calculate equivalent squares, and dip our toes into the unique world of electron beam Monitor Unit calculations.