Magnetic Resonance Imaging or MRI or sometimes called nuclear magnetic resonance is specifically suitable to provide images of the internal organs. Unlike other imaging methods, such as CT scan or X-Ray, the risk of harmful radiation is omitted in the case of magnetic resonance imaging.
Before discussing most imperative questions regarding magnetic resonance imaging (MRI), we should firstly understand the meaning of MRI, how it works, and its uses.
Let’s dive in.
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What is Magnetic Resonance Imaging (MRI)?
Magnetic Resonance Imaging (MRI) is an imaging method that uses magnetic waves to obtain detailed images of organs inside a body. The primary objective of MRI is to detect potential or present diseases in a body such as tumors, risks involving stroke, heart diseases, evaluation of kidney, pelvic organs, and many others.
The MRI scanner is an efficient diagnostic machine in a shape of a tube surrounded by a giant circular magnet. During the process of scanning, the patient is made to lie inside the machine. A heavy magnetic field is generated by the magnet, which aligns the protons of hydrogen atoms, which are then subjected to a beam of radio waves. The numerous protons in the body move, producing a faint signal that is sensed by the MRI scanner’s receiver component. The receiver information is processed by a computer, which results in a photograph.
What are the Uses of MRI scan?
When other tests fail to provide enough evidence to validate a patient’s diagnosis, an MRI scan may be used as an incredibly reliable means of disease identification in the body. It is often used after other research fails to provide enough information to confirm a patient’s diagnosis.
For instance, a magnetic resonance imaging scan is used by neurosurgeons not only to determine brain structure but also to assess the spinal cord’s stability following trauma. It’s often used for dealing with issues involving the spine’s vertebrae or intervertebral discs.
Why does an MRI machine make loud noise while scanning?
As we all know now, a powerful magnetic field is used in an MRI scan. During the scan, a superconducting magnet creates a solid base magnetic field. A series of electromagnets coiled in 3-axis within the magnet undergoes a slight, predictable change in field strength in each direction. The wires within the epoxy casing travel and create noise as the electromagnets are turned on and off.
Major differences between CT scan, X-Ray, and MRI?
CT scan, MRI, or X-Ray are not new terminologies in the healthcare sector. Doctors have been using these machines for ages to detect what is going inside our body. These images can help in screening for possible medical conditions before symptoms appear along with diagnosing the cause of existing symptoms or monitor health conditions that have been diagnosed and the effects of treatment for them. To just name of few, different types of imaging include CT scan, X-rays, MRI, and Ultrasound. Each of these imaging types uses different technology to create an image of our body. Let’s discuss a few of these imaging types and understand the major differences between them.
Discussing if there are any health risks related to MRI scan, or it’s all myth.
MRI scan is fairly a risk-free scan but there are some minor risks involved during the procedure. However, there is no major health risk related to MRI as it doesn’t involve the use of radiation.
Since an MRI scan is performed inside a very powerful magnetic field, it is necessary to remove all metallic objects before the scan, including hearing aids, watches, jewelry, mobile phones, and cloths with metallic threads or fasteners. Additionally, it is advisable to remove all lipstick, nail polish, or other products that may contain metallic particles.
A contrast agent known as gadolinium is inserted into a vein during specific MRI exams to help enhance the detail seen on the magnetic resonance images. Gadolinium does not contain iodine, unlike contrast products used in x-ray exams or CT scans, and therefore rarely induces an allergic reaction or other problem.
Claustrophobia is another risk associated with an MRI scan. Though an individual can opt for an Open MRI, the possibility of which can be discussed with the doctor.
Future of Magnetic Resonance Imaging (MRI)
MRI has been at the pinnacle of medical imaging, having a huge impact on many developments in diagnostic radiology. Most of the developing countries have benefitted from advancements in MRI hardware and applications.
So, where is MRI technology heading?
Well, the biggest manufacturers and researchers across the world are trying to take MRI technology towards portability. The current MRI machines are hefty and bulky which needs an entire room for it. In several cases, a portable MRI can be beneficial for the assessment of treatment. One such portable MRI launched by Hyperfine was launched in 2020 to scan the head, neck and, other extremities in about any clinical setting. The portable MRI can be used in emergency rooms, intensive care units, and places where a clinical MRI can’t be accessed.
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