For treatment, recurrence monitoring: When CEA levels are initially elevated and then decrease to normal after therapy, it means the cancer has been successfully treated. A steadily rising CEA level is often the first sign of tumor recurrence. CEA test may be used in combination with other tumor markers in the evaluation of cancer. Not all cancers produce CEA, and a positive CEA test is not always due to cancer. Therefore, CEA is not recommended for screening the general population.
Tan Delta is also known as the 'loss angle' or 'dissipation factor'. It is used to test the level of degradation in insulation materials of electrical machines and power cables. Tan Delta, also called Loss Angle or Dissipation Factor testing, is a diagnostic method of testing electrical equipment to determine the integrity of the insulation. This is done to try to predict the remaining life expectancy of the equipment.
Functional Testing â Concepts. Functional testing is a form of automated testing that deals with how applications functions, or, in other words, its relation to the users and especially to the rest of the system. Traditionally, functional testing is implemented by a team of testers, independent of the developers. While unit testing tests both what an application segment does and how it does it, functional testing tests only what the application does. A functional test is not concerned with an applicationâs internal details.