MRI Scan

What is an MRI Scan?

An MRI (Magnetic Resonance Imaging) scan uses powerful magnets and radio waves to create detailed images of the inside of the body. It does not use ionising radiation like X‑ray or CT scans.

What it measures

Why it is done

• Evaluate pain or swelling in joints or back
• Detect tumours, infections or inflammation
• Assess brain or spinal cord injuries
• Plan surgery or radiation therapy
• Monitor disease progression or treatment response

Early detection

MRI can help identify early signs of conditions such as multiple sclerosis, brain tumours or spinal cord compression, but it does not diagnose on its own. A clinician interprets the images alongside symptoms, history and other investigations.

What abnormal results may mean

• High signal intensity in a joint may indicate a tear or inflammation
• Low signal in brain tissue can suggest demyelination or tumour
• Enlarged vessels may point to aneurysm or stenosis

Many factors—hydration, recent exercise, medications—can influence image quality or interpretation.

Who might be advised to get an MRI

Patients with unexplained neurological symptoms, persistent joint pain, suspected tumours, or those needing detailed imaging before surgery.

Quick summary

MRI is a safe, non‑radiating imaging test that provides detailed pictures of soft tissues, helping doctors diagnose and monitor many conditions.

Preparation for an MRI Scan

• Fasting: No fasting is required for a standard MRI scan.
• Combined tests: If you are also having a blood test that requires fasting, follow the fasting instructions for that test.
• Procedure: You will lie on a movable table that slides into a large, cylindrical magnet. The scan takes about 30–60 minutes depending on the area being imaged.
• What to expect: The machine makes loud noises; you will be given earplugs or headphones. You may feel a mild pressure sensation if a contrast agent is used.
• Precautions: Remove all metal objects (jewelry, piercings, watches). Inform the technologist of any metal implants, pacemakers, or claustrophobia. Avoid alcohol 24 h before the scan if contrast is used.
• After the scan: You can resume normal activities immediately unless contrast was used; then you may be advised to drink extra fluids.

Always confirm specific preparation instructions with your doctor or the imaging centre. This information is for general education only and is not a substitute for professional medical advice.