Study tools
Interactive Diagrams
Drag the sliders to see how key ARRT concepts actually behave — not just static pictures to memorize. Diagrams marked in progress are on the way.
Image Production
Image Production · Image Quality
Beam Geometry: SID, OID & Image Quality
Move the part and the receptor and watch magnification, distortion, and unsharpness change — pure geometry, no memorizing.
Lesson: Primary exposure factors
Image Production · Digital Imaging
CR & DR Image Receptors
Inside the PSP plate and the flat panel — direct vs. indirect conversion, layer by layer.
Lesson: Digital imaging
Image Production · X-Ray Generator
Electrical / X-ray Circuit
Follow voltage through the x-ray circuit — autotransformer, step-up and filament transformers, and rectifiers — and watch the tube-voltage waveform change with the generator type.
Lesson: Electrical / x-ray circuit
Image Production · Grids
Grid Ratio & Grid Cutoff
Trade scatter cleanup against patient dose with the grid ratio, then break the grid on purpose — off-level, off-center, off-focus, upside-down — and watch each one fail in its own way.
Lesson: Advanced exposure factors
Image Production · Fluoroscopy
Image Intensifier
Follow the signal from input phosphor to output phosphor and see where brightness gain actually comes from.
Lesson: Fluoroscopic equipment
Image Production · Image Quality
Shape Distortion: Elongation & Foreshortening
Switch between the five CR, part and receptor arrangements and see which ones stretch the image and which one shortens it — three causes elongate, only one foreshortens.
Lesson: Primary exposure factors
Safety · X-Ray Tube
X-Ray Tube Construction
Explore how an x-ray tube is built and how its angled target drives both the Line-Focus Principle and the Anode Heel Effect.
Lesson: X-ray tube & components
Radiation Safety
Safety · Radiation Biology
Dose-Response Curves
Threshold vs. nonthreshold, deterministic vs. stochastic — the curves behind every radiation-effect question.
Lesson: Radiation biology
Safety · Radiation Protection
Fluoro Room Exposure Map
Primary beam, scatter, and leakage around a fluoro table — toggle the protective curtain and Bucky slot cover and watch the exposure field change.
Lesson: Radiation protection
Safety · Radiation Protection
Inverse Square Law
Drag the distance and watch beam intensity fall away — the math behind distance as a protection tool.
Lesson: Radiation protection
Safety · Occupational Dosimetry
Personnel Dosimeters
OSL, TLD, film badge, and pocket chamber — how each one works and where it belongs on your body.
Lesson: Detection & occupational dosimetry
Safety · Interactions with Matter
Photon Interactions with Matter
Photoelectric, Compton, and coherent — see which interaction dominates at each energy and what that means for dose and contrast.
Lesson: Interactions with matter
Safety · X-Ray Production
X-Ray Emission Spectrum
Slide kVp, mAs, and filtration and watch the bremsstrahlung curve and characteristic peaks shift in real time.
Lesson: X-ray production & interactions
Procedures
Procedures · Abdomen & GI
Abdomen Series Positioning
Supine, upright, and left lateral decubitus — and why the decub view is the one that shows free air.
Lesson: Abdomen & GI
Procedures · Chest & Thorax
Chest Positioning: PA, AP & Lateral
PA erect vs. AP supine vs. lateral — SID, central ray, and receptor placement side by side in 3D.
Lesson: Chest & thorax
Procedures · Skull & Facial
Cranial Baselines & Landmarks
OML, IOML, and the landmarks every skull projection is built from — and which named view uses which line.
Lesson: Skull / facial / sinuses
Procedures · Lower Extremity
Foot & Ankle Anatomy in 3D
Every bone of the right foot and ankle on a true 3D skeleton — rotate it, click any bone, and read it in the five projections a technologist actually shoots.
Lesson: Lower extremity
Procedures · Positioning Foundations
Positioning Terminology
Rotate the patient between the x-ray tube and the image receptor to see how every projection and position gets its name.
Lesson: Positioning foundations
Procedures · Upper Extremity
Upper Extremity Anatomy in 3D
Hand, wrist, elbow, and shoulder rendered from a true 3D skeleton — every structure labeled from real geometry.
Lesson: Upper extremity