Understanding the MRI Scan
Updated: Jul 2, 2022
The term "MRI Scan" refers to a test procedure known as magnetic resonance imaging that uses radio waves, computer technology, and strong, regulated magnetic fields to produce incredibly fine-grained images of the interior of the body.
The technique or test is occasionally also referred to as a Brain MRI or Cranial MRI because an MRI Scan is typically performed on the brain portion. An MRI scan is different from a CT scan or X-ray as an MRI scan does not use ionizing radiation, which can have long-term negative effects on the body.
The biggest advantage of an MRI scan from the Best MRI Scan Centers in Noida is that it produces 3D images through which image reconstruction is also available to perform additional CT scans.
An MRI scan provides a deeper vision and knowledge that is invaluable for medical applications, including diagnosis and therapy.
Because of this, evaluating microscopic brain regions like the brain stem using an MRI scan is quite successful. There are often no hazards involved with an MRI scan.
Capturing Images in an MRI Scan
The MRI scan uses a magnetic field along with radio waves to take images of inside the body parts. MRI scan helps take pictures of soft tissues inside the body such as organs and muscles.
When the magnetic field acts upon soft tissues present inside the organs, the water present in the tissues sends out an echo in response to the MRI scan's radio waves. The radiographer now can take cross-sectional images from almost any angle.
Types Of MRI Scan
An MRI scan is used to detect the diseases accurately within the body and can also be used to get sufficient information to confirm a patient's diagnosis.
An MRI is a painless scan that is mostly recommended by doctors and other medical professionals to get valuable information on specific glands and organs, with accurate information about the joints.
Here are different types of MRI scans with reasons why each of them is performed.
Brain Or Head MRI Scan
Head MRI is performed to get detailed images of the brain anatomy. The brain MRI is used to evaluate patients suffering from severe headaches, seizures, blurry vision, etc. It can also be performed if there is any abnormality detected in a CT scan.
Functional MRI (fMRI)
Functional magnetic resonance imaging (fMRI) is used to examine the changes in blood flow when there is any activity inside the brain. It is used to measure the functional anatomy inside the brain which determines the parts of the brain handling critical functions.
Magnetic Resonance Angiography or MRA is a type of MRI scan which is performed to examine the blood vessels and their functioning. It studies the blood vessels inside the brain and neck and helps detect the areas of narrowing and other vascular malformations.
A heart MRI is performed to examine the functions of the heart including its valves and blood vessels. It is used to detect the effects of any coronary artery disease by examining the blood flow to the heart.
MRI of the bones and joints
An MRI of the bones and joints is performed to investigate any kind of damage in the joints or issues related to the discs of the spine and pain in the neck or lower back as well as cancer.
MRI for other organs
An MRI scan can also be conducted for organs such as the liver, kidney, breasts, pancreas, and uterus. Essentially an MRI scan can be performed for any part of the body and at any age.
MRI Scan Using Contrast
The majority of the time, an MRI scan may produce sharp images of dense organs and structures, however, it can be challenging to find substances with low density.
The patient is given a special "dye"—technically termed a contrast material—to make the latter more visibly apparent. The patient may receive this contrast material orally, intravenously, or by an enema.
One is encouraged to consume a lot of fluids to aid the kidneys in eliminating the contrast material after the scan is over. Only after confirming that the patient has a normal kidney function, a contrast substance is recommended.
Before and After an MRI Scan
BEFORE THE MRI SCAN
Before undertaking an MRI scan, the doctor or other medical expert has to know whether the patient has allergies to any medications or foods, as well as any illnesses or diseases affecting the liver or kidneys, as well as any other disorders like asthma or pregnancy.
The patient must change into a gown or other loose-fitting clothing without any metal. Any jewelry, watches, underwire, bra, sunglasses, body piercings, metal tattoos, pens, keys, wigs, pins, and other similar items must be taken off prior to the MRI scan because it uses magnetic forces. In general, braces and dental fillings are acceptable.
DURING THE MRI SCAN
The patient is made to lie down on a table for the actual MRI scan procedure to begin. The table is then slowly lowered inside a sizable tube that is surrounded by a powerful magnet and has openings on either end. The patient's head is wrapped with a piece of plastic. The patient-carrying table will next be lowered inside the MRI machine's cylindrical tube.
To get accurate image results from an MRI scan, it is advised for the patient to stay calm and still on the table. The straps are used to keep the patient in place if there is a problem.
It is typical to hear loud noises inside the MRI scanner; you may request earplugs to muffle the sound. While the test is running, it's very common to experience some twitching or other sensation.
However, these all should not be a cause of concern while scanning.
An MRI scan from one of the Best MRI Scan Centers in Noida is a painless process and the entire procedure normally takes anywhere between 30 minutes to 1 hour, after which you are free to leave.