The diagnostic accuracy in detecting early-stage tumours using MRI is above 76%. MRI uses strong magnetic fields to take images of the inside of the body. Meanwhile, CT scans do a series of X-Rays and compile them into one whole.

Read on as we delve into the main differences between CT scans and MRI scans, including when and where to find a leading diagnostic healthcare provider. 

CT Scans: How Do They Work? 

CT scans (Computered Tomography) utilize multiple X-rays that combine to create images of the patient’s scanned body parts. A computerised tomography (CT) scan, sometimes referred to as a CAT scan, creates a cross-sectional image of various body parts by merging many X-ray images that are obtained from various angles. The radiologist may ask the patient to drink a liquid or have an injection of contrast media. This helps better delineate areas of the body and reveal any abnormalities there may be within the tissues and vessels. 

MRI Scans: How Do They Work? 

MRIs (Magnetic Resonance Imaging) use a strong magnetic field to take pictures of the internal organs. Compared to CT a series of scans are taken as part of an examination. 

What is the Key Difference between MRIs and CT Scans? 

The main difference between MRI and CT scans lies in their performance and service cost. These aside, here are the main differences between CT scans and MRIs.
 

• Speed: Typically, a CT scan will take up to 10 minutes, whereas MRIs can last from 20-40 minutes, but are getting quicker!
• Cost: In the UK, the average cost of a CT scan ranges from £395 to £600 per scan, whereas a total body MRI scan will cost from £1500 to £2,250.
• Image quality: MRIs use strong magnets and radio waves to produce precise images of your soft tissues and bones. CT scans can take several, two-dimensional X-ray images of the inside of your body. These X-ray images are then converted into three-dimensional images using a computer.
• Comfort: MRIs are much noisier than CT scans, mostly because of the technology used in the process. However, the technician will give you earplugs or headphones to dull the sounds. CT scans are quiet in comparison. 
• Radiation: Unlike CT scans, MRI scans don't use any radiation.​​​ MRI uses a strong magnetic field and anyone with metal in their body (pacemaker, stent, implant etc.) will need to ensure the material is MRI-safe.

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