Many patients ask about the differences between a CT (Computed Tomography) scan and an MRI (Magnetic Resonance Imaging) scan:
“Which is better?” or “Should I have one over the other?”
WHAT IS A CT SCAN?
A computerised tomography scan (CT or CAT scan) is a series of cross-sectional X-ray images of your body. CT scans are used to examine your bones and soft tissues for damage or abnormalities. Often, these images can be combined to create a 3D picture of your body.
A CT scan can help your doctor:
- diagnose infections and bone fracture
- identify masses and tumors (including cancer)
- study your blood vessels and other internal structures
- The test is minimally invasive and can be conducted quickly.
WHAT IS AN MRI?
A magnetic resonance imaging (MRI) scan is a noninvasive test that uses magnets and radio waves to create images of the inside of your body. It allows doctors to see details of your organs and tissues without having to make any incisions.
Differences between normal and abnormal tissue is often clearer on an MRI image than a CT. And while there isno radiationinvolved in an MRI scan, it can be a noisy exam and take longer than a CT.
It is considered a safer alternative test, especially for pregnant women.