what allows me to see the image of the brain and its areas of most activity - PET scan, how i can control isotopes' distribution by finding the substance - radioactive tagging, it produces hormones - Thyroid, it is an indicator of heart's damage - Built-up of calcium, what generates the image of an organ - radioactive tracers' radiation, a method which gives me the ratio between original activity/diluted activity - measure of blood volume, it's put into the blood if someone breathes carbon monoxide - carbon-11 tracer, with this I have radioactivity's spread - GM tube, what flows of a thyroid - iodine, it can substitute calcium - technetium,

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