Ligaments attach your breasts to the pectoral muscle on your chest. When you wear a bra, your supported breast does not allow the pectoral muscle to be exercised as much as it could be. When you do not wear a bra, as you move your arms, reach, and lift, your pectoral muscle is strengthened.
Positron emission tomography. Positron emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule.
To be extra sure, some doctors will order imaging tests, known as PET scans. They are often combined with CT scans. These scans take pictures of your body where cancer might be growing. But you may not need the tests. And their risks may be greater than the benefits. Hereâs why: PET and PET-CT scans usually donât help people who have completed cancer treatments and donât have symptoms. For most cancers, these tests donât help you live longer or with a better quality of life.