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Principles that minimise ionising-radiation exposure.
ALARA protection: Time, Distance, Shielding.
The Five X-ray Densities
The basic shades that let you read any plain radiograph.
Choosing an Imaging Modality
Matching the right scan to the clinical question.
CT vs MRI
The two main cross-sectional imaging techniques and when to use each.
Reading a Chest X-ray
The commonest radiograph — a systematic read avoids missed findings.
Ultrasound
Imaging with high-frequency sound waves — no ionising radiation.
Contrast Media
Agents that improve tissue distinction on imaging.