antigen specific immunity attributable to the production of antibody and of specific immune T lymphocytes (responsible for cell-mediated immunity), following exposure to an antigen, or passive transfer of antibody or immune lymphoid cells (adoptive immunity).
Types of X-rays and Scans. MRA (Magnetic Resonance Angiography) MRAâa type of magnetic resonance imaging (MRI) study that is obtained with the same scanning machineâuses a strong magnetic field combined with radiofrequency waves to create highly detailed images of blood vessels in the body. (MRA is most often used to examine vessels in the brain, neck, kidneys, and legs.) The resulting scans, which provide information about blood flow and the condition of blood vessel walls, may then be saved on a computer or on film and examined for abnormalities.
why it is done a magnetic resonance angiogram mra is done to look for a bulge aneurysm clot or the buildup of fat and calcium deposits stenosis caused by plaque in the blood vessels leading to the brainan aneurysm or tear dissection in the aorta which carries blood from the heart to the rest of the bodyith mra both the blood flow and the condition of the blood vessel walls can be seen the test is often used to look at the blood vessels that go to the brain kidneys and legs information from an mra can be saved and stored on a computer for further study photographs of selected views can also be made