Medical diagnosis is usually referred to as the process of determining the disease that best explains a set of symptoms. However, it is important to confirm the diagnosis with the help of the most appropriate diagnostic test in a given clinical setting. The confirmation of a disease or condition may either require medical tests or a posthumous diagnosis.
Further, a medical test may be conducted for screening and monitoring purposes. Based on the methods, the diagnostic tests can be classified into observational, questionnaire, physical examination, radiologic tests, in vivo diagnostics, and in vitro diagnostics.
