51ºÚÁÏ

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