MRI vs CT—what’s the difference and when is each used?

Follow-up explanation

MRI (Magnetic Resonance Imaging) and CT (Computed Tomography) are two of the most widely used medical imaging techniques, but they serve different purposes.

MRI scans provide highly detailed images of soft tissues, such as the brain, spinal cord, joints, ligaments, and organs. They are the preferred choice for diagnosing back pain, joint injuries, neurological problems, and tumours. For those considering a first-time MRI scan, it can be helpful to know that the process is longer than CT but delivers clearer soft-tissue detail.

CT scans use X-rays to produce cross-sectional images and are faster than MRI. They are often used for detecting fractures, internal bleeding, and urgent trauma-related conditions. Many patients also compare private CT scan costs with MRI when deciding which route to take.

When to use each

• MRI: best for soft tissue detail, long-term pain, joint injuries, and neurological assessment.
  
  
• CT: best foMRI uses magnets and radio waves to create detailed images of soft tissues, while CT uses X-rays for fast imaging of bones and internal injuries.
• r bone injuries, internal bleeding, chest/abdominal scans, and trauma.

Safety

CT scans involve ionising radiation, which means they are not always recommended for younger patients or where repeat imaging is needed. MRI does not use radiation and is considered safer for long-term follow-up. 

However, MRI may not be suitable if you have certain implants, such as pacemakers or metal fragments. Patients interested in full-body MRI scans often choose them for proactive health checks without exposure to radiation.

Preparation

For most MRI and CT scans, no special preparation is required unless a contrast dye is needed. You may be asked to remove jewellery, watches, and metal items before an MRI. CT scans are typically quicker, while MRIs may take longer and require lying still in the scanner for up to 30-45 minutes.

Results

With GetScanned, MRI results are typically available within 2-5 working days, reviewed by consultant radiologists, and shared securely online. CT results are often processed quickly due to their common use in urgent care. By choosing private imaging, whether MRI or CT, you can avoid delays, with many patients finding access much faster compared to NHS wait times.

What you need to book

• Scan type: MRI or CT scan
• Body part: e.g., brain, spine, knee (View all body parts)
• Preferred clinic location: Nationwide coverage
• Date & time: Choose what suits you
• Payment: Secure online checkout

‍