Screening tests are offered to asymptomatic people who may or may not have an early disease or disease precursors and test results are used to guide whether or not a diagnostic test should be offered. The result of the test is an estimate of the level of risk and determines whether a diagnostic test is justified.
A screening test is done to detect potential health disorders or diseases in people who do not have any symptoms of the disease. The goal is early detection and lifestyle changes or surveillance, to reduce the risk of disease, or to detect it early enough to treat it most effectively.
A diagnostic test is a procedure performed to confirm or determine the presence of disease in an individual suspected of having a disease, usually following the report of symptoms, or based on other medical test results. Using nuclear medicine to examine a patient suspected of having lymphoma.
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