Researchers in Germany have developed a fluorine-based tracer compound that can bind with high affinity to small clots, allowing doctors to image them using positron emission tomography (PET).Blood clots can cause heart attacks and strokes. Doctors often need to find clots using imaging techniques, so that they can treat them or identify where thrombi are causing problems. At the moment, imaging techniques frequently rely on spotting changes in blood flow, rather than imaging the clots themselves. Depending on the suspected location of a clot, different imaging techniques are needed, and it can be difficult to spot smaller clots, or damaged areas in blood vessels where there is a risk of clots forming.

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