Subject 29 · Medical Physics
Chapter 29
Medical Physics
See one physics idea inside each imaging machine: X-ray attenuation, CT reconstruction, ultrasound echoes, nuclear tracers, MRI resonance, and the calculus of signal loss.
Build medical physics one idea at a time.
Start with the foundations, then explore advanced ideas and calculus at the depth your course needs.
6 of 6 lessons
X-Ray Imaging
Connect tube spectrum, attenuation, contrast, and image formation.
CT Scanning
Spin projections into a reconstructed slice and consider dose.
Ultrasound Imaging
Use pulse echoes, depth, and acoustic impedance.
Nuclear Medicine & PET
Track tracers, gamma cameras, and annihilation photons.
MRI
Use spins, resonance, and relaxation for soft-tissue contrast without ionising radiation.
Medical Physics Calculus
Derive exponential attenuation, half-value thickness, and effective half-life.
Change one variable. Watch the physics respond.
Explore d = vt/2, then take the idea into the full lessons.
Locate an echo
The pulse travels to the reflector and back, so the measured path is twice the depth.
Everything around the chapter, in one place.
Keep building with practice, classroom presentations, formulae, and a game that puts these ideas to work.
Exam practice
Questions, guided reasoning, and exam-style problem solving.
Browse exam questions →Formula toolkit
Keep the key relationships and their units close to hand.
Review formulae →Members · Classroom presentationClassroom slides
Reveal lesson ideas, examples, and checks in full-screen classroom mode.
Open slides →Lesson files
Find downloadable teaching resources and worksheets in the library.
View files →Echo Hunter
d = vt/2. Read an ultrasound A-scan and call reflector depths from echo times.
Play the free chapter game →See it. Read it. Work it.
Connect diagrams to physical relationships and exam reasoning.
Explore diagrams →Guided support
Ask for a hint, check your reasoning, or explore a similar problem.
Ask GioAI →Key ideas to remember
Move without losing your place.
Extra challenging questions
Take the ideas further with course-specific extension questions, supplied-data graphs and worked solutions.