Topic 24Physics (Cambridge)

Medical physics

Medical physics — Cambridge International A Level Physics (9702, Topic 24). Ultrasound imaging (piezoelectric transducers, acoustic impedance, attenuation), X-ray production and CT imaging, and PET scanning.

Practice questions

Medical PhysicsSign up

ultrasound: piezoelectric transducer, acoustic impedance Z = ρc, reflection coefficient and gel coupling · attenuation of a beam in tissue, I = I₀ e^(−μx) · X-ray production in an X-ray tube; minimum wavelength λ_min = hc/(eV); attenuation, contrast and CT · PET: a β⁺ tracer, electron–positron annihilation into two 0.511 MeV γ-photons, coincidence detection

45 min