MRI Scan Basics
Finnegan Flynn
| 07-09-2026
· Science Team
For many Lykkers, hearing that a doctor has recommended an MRI can bring up plenty of questions. What exactly does the scan do? How is it different from other imaging tests?
And what should we expect during the examination? MRI, short for magnetic resonance imaging, is a widely used imaging method that creates detailed pictures of structures inside the body. Understanding how it works and what the experience is like can make the process feel much easier.

How MRI Creates Images

MRI uses a strong magnetic field and radio waves to produce detailed images of the inside of the body. Unlike imaging methods that rely on ionizing radiation, MRI does not use X-rays. This makes it a valuable option when doctors need a clear view of certain tissues and structures.
The scanner can produce images in different directions, allowing healthcare professionals to examine an area from several angles. The resulting pictures can reveal details that may be difficult to see with some other imaging methods.

Which Areas Can Be Examined

One of the major strengths of MRI is its ability to show soft tissues clearly. Depending on the medical question, a scan may be used to examine the brain, spinal cord, joints, abdomen, or other parts of the body.
For brain and spinal examinations, MRI can help doctors assess conditions that affect the nervous system and surrounding structures. It can also provide useful information when a person has symptoms that require a closer look inside the head or spine.
MRI is also commonly useful for examining joints. Structures such as ligaments, cartilage, and other soft tissues can appear clearly, helping doctors investigate certain injuries or sources of discomfort.

What Happens During The Scan

Before the examination begins, we may be asked to remove metal items such as jewelry, keys, watches, or other accessories. These precautions are important because the scanner contains a powerful magnetic field.
During the scan, we usually lie on a movable table that enters the MRI machine. The scanner can look like a large, short tunnel, so some people may feel uncomfortable in the enclosed space.
Remaining still is especially important. Even small movements can make images less clear, which may mean that some pictures need to be repeated. The machine can also produce loud tapping, knocking, or buzzing sounds while it collects images. In many facilities, hearing protection is provided.

Why Preparation Matters

Preparation can vary depending on the type of MRI being performed. Some examinations require little preparation, while others may involve specific instructions about eating, drinking, or taking certain medications.
It is important to tell the healthcare team about any implanted device, metal fragment, or medical device before entering the scanning area. Some devices are suitable for MRI under specific conditions, while others may require additional assessment.
We should also mention if we feel anxious about enclosed spaces. The healthcare team can explain what will happen and discuss appropriate options before the examination begins.

Is MRI Suitable For Everyone?

MRI is considered a valuable imaging technique, but it is not automatically suitable for every person or every situation. Certain implanted devices or metal objects may require careful evaluation before scanning.
Pregnancy is another situation that should be discussed with the healthcare team. If someone is pregnant or thinks they may be pregnant, informing the medical staff before the examination allows them to consider the most appropriate approach.
The decision to use MRI depends on the individual situation, the area being examined, and the information the doctor needs.

Understanding The Experience

An MRI examination can take longer than some other imaging tests because the machine collects a series of detailed images. The exact duration depends on the type and number of sequences required.
The most useful thing we can do is follow the instructions carefully and remain as still as possible. If anything feels uncomfortable, we should communicate with the healthcare team rather than trying to manage the situation silently.

Final Thoughts

MRI gives healthcare professionals a detailed way to look inside the body without using X-ray radiation. Its ability to display soft tissues makes it especially useful for examining areas such as the brain, spine, and joints.
For us as patients, the key is preparation: remove metal items, provide complete information about medical devices and implants, follow the instructions, and ask questions when something is unclear. With a better understanding of the process, an MRI scan can feel far less unfamiliar and much easier to approach.

What to Expect from an MRI

Video by RAYUS Radiology®