Clinical haematology · UKMLA & AKT
Ultrasound imaging
A free high-yield preview for the UKMLA Applied Knowledge Test. Below are the key points to recognise ultrasound imaging — the full SA Note notes add investigations, management, complications and 10 practice questions.
Key high-yield points
- Piezoelectric crystals convert electrical energy into high-frequency sound waves (2-18 MHz); returning echoes are used to construct a greyscale image
- Higher frequency (7-18 MHz) - better resolution, less penetration; for superficial structures (thyroid, testes, musculoskeletal)
- Lower frequency (2-5 MHz) - less resolution, greater penetration; for abdominal and pelvic imaging
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