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Positron emission tomography, also called PET imaging or a PET scan, is a type of nuclear medicine imaging that measures important body functions, such as blood flow, oxygen use, and sugar (glucose) metabolism, to help doctors evaluate how well organs and tissues are functioning.
Magnetic resonance imaging (MRI) is a noninvasive medical examination that does not use ionizing radiation (X-rays). The MRI machine uses a large magnet and a computer to take pictures of the inside of your body. The scan usually takes between 45 to 60 minutes. Breast MRI scans should be scheduled within 7-12 days of the onset of one’s menstrual cycle unless the request is urgent.