Answer:
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Answer: Radioactively-labeled materials
Explanation: nuclear medicine is a medical specialty that uses radioactive tracers to diagnose and treat different diseases. Radioactive tracers are materials that can vary according to the purpose of the method. For most diagnostic, the radioactive tracer is administered by intravenous injection. However it may also be administered by inhalation, by oral ingestion, or by direct injection into an organ.
SPECT scans are primarily used to diagnose and track the progression of heart disease, and the major purpose of PET scans is to detect cancer and monitor its progression, response to treatment, and to detect metastases. This two methods are the most used in nuclear medicine.
Answer:
The main result from the increase of trade that followed the Crusades was the further development of several European and Middle Eastern cities, especially those with ports in the Mediterranean, and the development of closer ties between the two regions.
Cities like Venice, Genoa, Pisa, Amalfi, Constantinople and Accre benefited quite a lot from this new trade developments, and became, accordingly, some of the wealthiest areas of the region at the time.
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