When feeling pain in the knee joint area, or experiencing stiffness, limited movement, swelling, or having an accident involving the knee from sports, doctors generally recommend an examination using magnetic resonance imaging (magnetic resonance imaging: MRI) of the knee. This not only reveals the characteristics of the knee bones but also detects various abnormalities in the knee joint.
Understanding Knee MRI
MRI (Magnetic Resonance Imaging) is an examination using a device that scans the body by creating realistic images of different parts of the body using a high-intensity magnetic field and radio waves (Radio Frequency). This provides detailed and clear images of various organs in the body, displayed on a computer screen. The images obtained are clearer than those from a CT scan. Therefore, knee MRI can provide answers in cases of suspected knee degeneration, ligament tears, bone fractures or cracks, and can also indicate the amount of fluid in the knee joint. This is extremely useful in helping doctors diagnose and prepare precise treatment plans.
Symptoms Indicating the Need for Knee MRI
- Swollen, painful knee
- Chronic knee pain
- Stiff or limited knee movement
- Difficulty walking or climbing stairs
- Unable to fully straighten or bend the leg
- Accident involving the knee
Are There Any Limitations to Knee MRI?
Since this examination does not use harmful X-rays, it can be performed on patients of all ages without much preparation and can be done immediately. It can also be performed during pregnancy between 6 to 9 months if there is an appropriate indication for the examination, but it is still avoided during the first 3 months of pregnancy. However, MRI examinations have limitations because they use a magnetic field, which is constantly strong. Patients with metal implants in their bodies should avoid MRI, such as those who have undergone surgery with aneurysm clips or have artificial heart valves. The doctor will determine whether it is safe to undergo the examination. In cases of bone plating or joint replacement, the images may have interference if the metal is near the area being examined. Additionally, patients who are claustrophobic or cannot lie flat in the MRI tunnel may face difficulties. In some cases, doctors may administer sedatives or anesthesia before the examination.
How Long Does a Knee MRI Take?
On average, it takes about 30 minutes to 1 hour, and results are available approximately 1.30 to 2 hours after the examination. This is because the MRI results must be interpreted by a radiologist specialized in knee imaging. For MRI of other body parts, the examination time is similar, depending on the organ being examined.
Post-Knee MRI Examination Care
After the examination, patients can go home and resume their normal daily activities, except for those who received sedatives or tranquilizers before the scan. Such patients should be accompanied by a friend, relative, or caregiver and avoid driving or operating machinery as it may be dangerous.
