Part 2 · Dyes, Tracers and Treating with Rays
Same concept, other depth: Clinical Reasoning →
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A woman's ultrasound shows a 3 cm lump in her liver. Is it a harmless blood‑vessel lump or a cancer? The doctor injects a few millilitres of microbubbles into her arm vein and watches the lump light up from the edges inward over a few minutes, the classic pattern of a harmless haemangioma. No radiation, no kidney risk, answer in ten minutes.
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