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Latest Videos from Radiography101
The list updates from the channel feed and keeps a local fallback if the feed is unavailable.
An interactive learning hub for radiologic technology students. Explore the physics, equipment, and clinical applications behind every major imaging modality — from X-rays to MRI.
Each modality page covers the underlying physics, how the equipment works, interactive diagrams, clinical applications, and key concepts for your exams.
From Röntgen's accidental discovery in 1895 to modern digital imaging. An interactive timeline of the milestones that shaped medical imaging.
Timeline · PioneersThe foundation of all medical imaging. Understand X-ray tube physics, image formation, exposure factors, and diagnostic applications.
Ionizing · DiagnosticHarnessing high-frequency sound waves for real-time imaging. Explore the piezoelectric effect, transducer types, and Doppler techniques.
Non-Ionizing · Real-TimePowerful soft-tissue contrast using magnetic fields and radio waves. Learn proton physics, pulse sequences, and scanner safety protocols.
Non-Ionizing · Soft TissueCross-sectional anatomy from a rotating X-ray beam. Understand Hounsfield units, multi-detector arrays, and helical scanning.
Ionizing · Cross-SectionFunctional imaging with radiopharmaceuticals. Explore SPECT, PET, gamma camera principles, and radionuclide therapy applications.
Ionizing · FunctionalUsing ionizing radiation to treat cancer. Understand LINAC machines, treatment planning, fractionation, and the role of the radiation therapist.
Therapeutic · LINACIn-depth guides on positioning techniques, exam prep, career advice, and modality comparisons — written for radiologic technology students.
Master abdominal X-ray positioning — AP supine, erect, and left lateral decubitus with Clark's centering points. Common errors, quality checks, and ARRT exam tips.
June 1, 2026 Study NotesPhysics formulas, positioning landmarks, contrast media, dose limits, patient care essentials — a complete study reference for ARRT and RTLE exam prep.
May 29, 2026 MRIT1/T2 relaxation, Larmor frequency, gradient coils, pulse sequences, RF coils, and MRI safety concepts explained for MR tech students.
May 29, 2026 Nuclear MedAnger camera, planar imaging, SPECT vs PET, Tc-99m generator, annihilation coincidence detection, and nuclear medicine quality control.
May 29, 2026 UltrasoundAbdominal, OB/GYN, vascular Doppler, MSK, interventional ultrasound, POCUS (FAST exam) — the complete range of diagnostic sonography applications.
May 29, 2026 EducationHow X-ray imaging works, the role of the rad tech, all six imaging modalities, radiation safety, and how to start a career in radiologic technology.
May 29, 2026 PhysicsBremsstrahlung braking radiation and characteristic radiation explained — how the X-ray tube generates photons, the emission spectrum, and the complete chain.
May 29, 2026The list updates from the channel feed and keeps a local fallback if the feed is unavailable.
Designed to work alongside your radiography program curriculum.
Get context on how medical imaging evolved. Understanding the "why" makes the physics easier to remember.
Each page covers physics principles, equipment diagrams, clinical uses, and key terminology.
Hover or tap on interactive diagrams to reveal labels, explanations, and component descriptions.
Visual explainers show you exactly how each technology works — from X-ray production to MRI proton alignment.
Key differences at a glance.
| Modality | Energy Source | Ionizing? | Primary Use | Soft Tissue? |
|---|---|---|---|---|
| X-Ray | X-ray photons | Yes | Bone, chest, dense structures | Limited |
| Ultrasound | Sound waves (MHz) | No | Soft tissue, vascular, OB | ✓ Excellent |
| MRI | Magnetic field + RF | No | Brain, spine, joints, soft tissue | ✓ Superior |
| CT Scan | X-ray photons | Yes | Trauma, chest, abdomen, vascular | Moderate |
| Nuclear Medicine | Gamma rays | Yes | Functional imaging, metabolism | Moderate |
| Radiotherapy | High-energy photons/particles | Yes | Cancer treatment | — |
