MRI is a non-invasive medical imaging technique that uses strong magnetic fields and radio waves to create 2D or 3D images of the body.
MRIs are especially useful for looking at organs, soft tissue, blood vessels and other internal parts of the body. However, MRI scans can also be used to look at things like bone density and joint spaces.
It has many applications in medicine; it helps doctors diagnose conditions such as cancer or traumatic injuries. It can also help identify fractures or other bodily abnormalities that may not have been found otherwise.
In addition to being used by physicians, MRI scans are sometimes ordered by physical therapists who want to assess muscle function and spine alignment during rehabilitation exercises. And they are often used by researchers studying how the body responds to treatments and disease.
What is MRI and how does it work?
MRI is one of the most important diagnostic imaging tools for obtaining clear images of the brain which can provide physicians with insights into pathological conditions. It is commonly used to diagnose tumors, stroke, and other neurological diseases. An MRI scanner takes 100,000s of still images in a matter of seconds and converts them into 3D motion pictures.
The first thing you need to know about MRI is that it is completely painless. Why? This will become evident when I introduce you to the different parts of an MRI machine next.
The second thing you are going to need to know about MRI is this: it is not like an X-ray or CT scan that uses ionizing radiation (meaning energy) on patients. In fact, there is no ionizing radiation involved in MRI. It is a completely different modality than X-rays or CT scans and does not use ionizing radiation at all.
Now that we have gotten these two facts out of the way, I can further discuss what an MRI machine is.
An MRI scanner consists of a very powerful magnet, a computer and radio transmitter/receiver. The magnetic field causes protons in the body to ‘become excited,’ this is called atomic resonance. As the protons go back to their normal state they release energy, which is picked up by the receiver and turned into an image.
The main benefit of having a giant magnet in your scanner is that it allows for more powerful magnetic fields than other imaging techniques. And it allows you to get very clear images with a short scan time because the greater magnetic field allows you to use stronger gradients in the scanner.
With a short scan time, you can quickly perform very precise and high-resolution sequences that allow physicians to see details of diagnosis like never. The sequences used by MRI scanners are so powerful that not only do they pick up the muscle movements (like when someone is flexing), but they also pick up the blood flowing in your body. The powerful magnets used to create these images can be up to 7,000 times stronger than the Earth’s magnetic field.
That is why physiotherapists are using MRI machines more often as they realize that it can help identify tightness or weaknesses in certain muscles and other conditions that may be present. Most of the scans are done while a patient is lying flat on his or her back, as it allows for better visualization of the internal organs and spine. However, MRI technicians can also perform specialized techniques that allow them to get better images of joints and extremities.
MRI (Magnetic Resonance Imaging) is a non-invasive technique that uses magnetic fields and radio waves to create detailed images of the human body. It has many applications in medicine, including aiding physicians with diagnoses for conditions such as cancer or traumatic injuries. MRI scans are also sometimes ordered by physical therapists who want to assess muscle function during rehabilitation exercises, and they are often used by researchers studying how the body responds to treatments and disease.