What is a brain MRI without contrast?
Magnetic resonance imaging (MRI) is a way of viewing the inside of the body, especially soft tissues without using any invasive procedures. Instead, the magnetic field is combined with radiofrequency pulses and creates a picture that appears on the computer. In many cases, a contrast substance such as gadolinium or iodine is given to the patient, and blood vessels, intestines or other areas of the body usually occur during MRI procedure. Not all tests require this and in some cases the patient may be administered to the patient without the contrasting substances used.
MRI brain is used to diagnose many different conditions. Some include aneurysms, moves and tumors. This procedure is also used to identify lesions of multiple sclerosis and find injuries from an accident or illness. There are times that the use of a contrast agent is necessary, but many times it is possible to obtain the desired results from the brain MRI without contrast. It is generally depends on the investigated condition.
When there are suspicions of problems with blood vessels, tumors or inflammation, it is likely that the doctor decides to use contrasting material with MRI brain. The contrast agent is usually injected just before the MRI procedure. In some cases, this may be injected during the test, especially if the brain areas are examined for blood flow problems, for example after a stroke. Trying to get pictures of blood vessels from brain mri without contrast is often unsuccessful.
People who are allergic to contrasting substances or who are suspected of conditions that are equally easy to see can have brain MRI without contrast. Usually anyone who has serious kidney problems will also not be provided with a contrast agent, as in some cases the contrast can cause other kidney problems. Some MRIS types used to explore multiple sclerosis (MS) can also be administered without contrast.
as a patient whoIt undergoes brain MRI without contrast, and one who had a contrast injection will be required to hold absolutely all the time during certain parts of the test. This allows the machine to get a clear and focused image of the patient's brain. If the subject moves, the results will not be clear enough to show the level of details usually required from the MRI results. Not everyone is a good candidate for brain MRI, especially people who are very overweight who are a pacemaker or who are claustrophobic. In such cases, additional tests can be used to diagnose the patient's condition.