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OCR A level Physics: Medical Imaging

OCR A level Physics: Chapter 27 Medical Imaging is apart of the Module 6: Particle and Medical Physics All presentations come with worked examples, solutions and homeworks. 27.1 X-rays 27.2 Interaction of X-rays with matter 27.3 CAT Scans 27.4 The Gamma Camera 27.5 PET Scans 27.6 Ultrasound 27.7 Acoustic Impedance 27.8 Doppler Imaging * The basic structure of an X-ray tube * How accelerating potential difference affect electrons and X-rays produced. * Production of X-ray photons * Maximum wavelength, frequency and energy of X-rays * Simple scattering * Photoelectric effect * Compton scattering * Pair production * Attenuation coefficients and calculations * Contrast medium * Therapeutic use of X-rays * CAT stands for computerised axial tomography. * State the advantages and disadvantages of CAT scans over traditional X-rays. * Describe how a CAT scanner works. * Radiopharmaceuticals * Tracers - Penetration power and half-life * Technetium-99m Decay Route * The structure and functions of a gamma camera - Collimator, Scintillator, Photomultiplier tubes. * PET stands for positron emission tomography. * Radiopharmaceutical - Fluorine-18 and Carbon-11 * Nuclear equations * The production of Fluorine-18 * How PET scanners operate * Advantages and disadvantages of PET * Frequency range of ultrasound * The operation of transducers * The piezoelectric effect * A-scans and B-scans * Acoustic impedance * Intensity Reflection Coefficient * Acoustic Matching * The Doppler Effect * Doppler Scans * The angle between the transducer and the blood vessel * Calculating the speed of blood from a Doppler scan