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Matching the right scan to the clinical question.
The Five X-ray Densities
The basic shades that let you read any plain radiograph.
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.
Radiation Safety (ALARA)
Principles that minimise ionising-radiation exposure.