Free · open · built on real CT
Learn CT the way itactually works.
A mechanism-first, PhD-level CT monograph for physicians — taught with real CT volumes and real 3D models you can interact with, from x-ray production to expert diagnostic reasoning.
🎮Earn XP and level up from Observer to Professor as you learn — then climb the Arcade leaderboard.
Real CT volumes & CT-derived 3D anatomy render right here in the course — scroll, reslice, window, and rotate.
Open the live atlas →Real CT data, never cartoons
Every volume, slice, and 3D model is real, de-identified, openly-licensed imaging — rendered in a genuine medical viewer, not illustrated.
Hands-on, not a slideshow
Scroll real volumes, reslice in any plane, window tissue in Hounsfield units, and spin CT-derived 3D anatomy — right in your browser.
Graduate-level depth
From the Beer–Lambert law and the Fourier-slice theorem to SSDE and deep-learning reconstruction — with the math, explained kindly.
Free. No account. Forever.
Built for physicians and trainees everywhere. Your progress lives privately in your browser — nothing ever leaves your device.
The curriculum
Five pillars take you from how a single x-ray photon is born to expert, evidence-based diagnostic reasoning across every organ system.
Imaging Science
From x-ray production to reconstruction, dose, contrast, and artifacts — the physical basis of every CT number.
Anatomical Mastery
Cross-sectional anatomy from the cortex to the bone compartments, organized for expert pattern recognition.
Imaging Pathobiology
The cellular and tissue mechanisms — edema, ischemia, hemorrhage, inflammation, infection, neoplasia — that generate imaging signatures.
Organ-Based CT Interpretation
Systematic, mechanism-first interpretation across neuro, thoracic, abdominal, pelvic, vascular, trauma, and oncologic CT.
Advanced Interpretation & Imaging Science
Universal patterns, quantitative imaging, AI, evidence, diagnostic reasoning, error science, and integrated practice.
Ready to dive in?
No sign-up, no cost. Start with the physics or jump straight to reading real scans in the Atlas.