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 b
AQA
I.
Specification A, AS Physics, 5451:
Module 6: Medical physics - Option
- 15.6.5 Ultrasound imaging Reflection and transmission
characteristics of sound waves at tissue boundaries, acoustic impedance
Advantages and disadvantages of ultrasound imaging in comparison
with alternatives including safety issues and resolution
- 15.6.6 Piezoelectric devices Principles of generation and detection
of ultrasound pulses
- 15.6.7 A-scan and B-scan Examples of applications
- 15.6.12 X-ray imaging The physics of diagnostic X-rays
- 15.6.13 Physical principles of the production of X-rays Rotating-anode
X-ray tube; methods of controlling the beam intensity, the photon
energy, the image sharpness and contrast and the patient dose
- 15.6.14 Differential tissue absorption of X-rays Excluding details
of the absorption processes
- 15.6.15 Exponential attenuation Linear coefficient µ, mass
attenuation coefficient m µ and half-value thickness
- 15.6.16 Image contrast enhancement Use of X-ray opaque material
as illustrated by the barium meal technique
- 15.6.17 Radiographic image detection Photographic detection with
intensifying screen and fluoroscopic image intensification; reasons
for using these
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