A diagnostic test may be performed to detect and diagnose health problems. These tests can be helpful in finding diseases and tracking their progression. There are many types of diagnostic tests. CT scans, PET scans, MRIs, ultrasounds, and blood tests are some of the different types.
A computed tomography (CT) scan is a diagnostic imaging tool. They create cross-sectional images of the body using computer and x-ray technology. Doctors can usually check all major parts of the body for abnormalities with this test. It can be used to diagnose cancer, find signs of heart disease, locate blood clots and internal bleeding, and identify many other health problems.
Specialized x-rays are usually taken to produce CT scan images. This diagnostic test can scan the body from many different angles. Contrast dye can be used to provide better images. This test can clearly show organs, bones, and internal structures such as glands, blood vessels, and lymph nodes.
Another type of diagnostic test is a positron emission tomography (PET) scan. A PET scan is a medical imaging test. It can be used to show how well organs inside the body are working. The scan can be used to detect differences in chemical and metabolic activity. Vital body functions such as oxygen use, blood flow, and glucose metabolism can be measured with this type of scan.
PET scans can help doctors make more accurate diagnoses. Commonly detected health problems include brain disorders, central nervous system problems, heart problems, and cancer. This test may be used to help plan a course of treatment. Additionally, it can be used to conclude the effectiveness of current treatment plans.
Magnetic resonance imaging (MRI) can also be used in diagnostics. Computer images of internal structures such as bones, organs, muscles, and nerves can be produced using electromagnetic radio waves. This test can usually be done anywhere on the body. This imaging technique can produce detailed images of organs and soft tissues.
High-frequency sound waves are used to view internal organs and the images on an ultrasound during an MRI. Some organs commonly seen by this type of diagnostic test include the liver, kidneys, heart, and other key organs. It can also be used during pregnancy to examine the fetus. An ultrasound may also be called an ultrasound.
If a person has had heart problems, their doctor may recommend that they have an electrocardiogram (EKG or ECG). An EKG is commonly used to diagnose underlying heart problems. This test measures the electrical activity of the heart. An echocardiogram may also be used to check for heart abnormalities. This test produces a graphic schematic of the heart's movement, including images of the heart's chambers and valves.
Blood tests can also be used as a diagnostic tool. A blood sample is drawn for laboratory analysis for this test. Diseases, organ function, and medication effectiveness can usually be analyzed. Blood tests are generally used to determine a variety of health problems.
A patient's doctor will usually decide the best type of diagnostic test for them. Testing is usually done on an individual basis. Some people may need to undergo more than one test to receive a proper diagnosis.