Radiography physics · interactive labs

See what happens inside the x-ray room.

Nine hands-on labs for radiologic science students. Practice on your own any time, or join your instructor's live class session.

Join a class Type the 4-digit code on the classroom screen, or scan its QR code.

The labs

01 · Generator & tube

X-Ray Circuit Trainer

Press a two-position hand switch and watch the circuit energize, from the autotransformer to the rotating anode.

  • Autotransformer, step-up, rectifier, filament circuit
  • Real tube photo with rotor and electron cloud
  • A hand radiograph forms as you expose
02 · Physics

EM Spectrum Explorer

Tune from radio to gamma with linked frequency, wavelength and energy, and see what each photon does to an atom.

  • Ionization boundary at 100 nm
  • Wave–particle duality and intensity
  • Photoelectric, Compton, pair production
03 · Beam

X-Ray Production Lab

Electrons hit the target and make heat, bremsstrahlung and characteristic x-rays. The spectrum and the patient respond live.

  • kVp, mA, target, generator, filtration
  • HVL, mean energy, characteristic share
  • Interactions in fat, tissue, bone, iodine
04 · Scatter control

Grid Lab

Choose grid ratio, frequency and type, then cause and fix every grid error on real radiographs.

  • Off-level, off-center, off-focus, upside-down
  • Bucky factor and contrast improvement
  • Moving vs. stationary grids
05 · Quality control

QA/QC Lab

Run 15 QC tests in a virtual room, record results in a QC log, and find the hidden faults in an audit room.

  • kVp, timer, linearity, reproducibility, HVL
  • Collimation, alignment, focal spot, processor
  • Detector, monitor and lead apron checks
06 · Radiation biology

Radiation Biology Lab

Dose any region with x-rays, beta, protons, neutrons or alpha and see equivalent and effective dose, tissue reactions and stochastic risk.

  • ICRP 103 weighting factors, LNT risk
  • Thresholds: skin, lens, gonads, ARS
  • Cell survival, LET tracks, oxygen effect
07 · Atomic structure

Atom Builder

Add protons, neutrons and electrons, explore the chart of nuclides, decay unstable isotopes, and fire radiation at the atom.

  • Isotopes, ions, real shell structure
  • β⁻, β⁺, EC, α, isomeric decay with real half-lives
  • Photoelectric, Compton, pair, neutron activation
08 · Patient care

Patient Scenarios

Read the order and chart, meet the patient, and make the call when something does not add up.

  • Identification, laterality, pregnancy, refusal
  • Priors, appropriateness, contrast history
  • Infection control, scored with debriefs
09 · Positioning & technique

Exposure Simulator

Position the patient, angle the tube, set SID, kVp, mAs and grid, and get a radiograph computed from a real CT scan.

  • Chest, KUB, T- and L-spine, RPO/LPO obliques, L5–S1, SI joints
  • Rotation, centering, collimation, motion graded
  • EI / DI, entrance dose, scatter, film-like vs DR
10 · Radiographic math

Radiographic Math Lab

Change the numbers and watch the circuit, the transformer, the beam and the technique respond, with every formula worked out live.

  • Ohm's law: single, series, parallel; power
  • Step-up, filament and autotransformers
  • Inverse square, exposure maintenance, 15% rule, mAs

How it works

Practice

Open any lab and change anything. Each lab has Predict-it questions and Fix-it challenges. No sign-in.

Class session

Your instructor starts a session and gets a code. Everyone's screen follows one driver, and the instructor can hand control to a student.

Predict it, live

In class, each student answers privately. The instructor sees the tally, then reveals the answer for the whole room.

For instructors

Choose a lab, click Teach a class, enter your PIN, then show the join screen on the projector.