An expansion of the first cause argument is the Kalam cosmological argument, which also requires creatio ex nihilo: 1  Everything that begins to exist has a cause. 2  The universe began to exist. 3  Therefore, the universe has a cause.
A diagnostic test may be performed to detect and diagnose health problems. These tests can be useful in finding diseases and tracking their progression. There are many kinds of diagnostic tests. CT scans, PET scans, MRIs, ultrasound and blood tests are some of the different types. A computed tomography (CT) scan is a diagnostic imaging tool. They create cross-sectional pictures of the body using computer and X-ray technology.
2. in diagnostic tests the use of a test which has a high sensitivity but often only a moderate specificity. Usually this is a quick and cheap test which is followed by a more expensive but more accurate test carried out on the positive reactors to the screening test. 3. fluoroscopy or image intensification (Great Britain). biochemical screening. using biochemical tests for purposes of detecting the presence of a disease.