What is the difference between
an MRI and a CT scan?
Whenever you watch a medical drama on TV, you often hear the words CT scan and MRI mentioned whenever doctors are talking about diagnosing a patient. However, it is not always clear as to what these things actually are.
Both MRIs and CT scans are scanning methods that are extremely useful in diagnosing the impact of head trauma, determining the cause of abdominal pain, and identifying bone fractures. A CT (computerized tomography) scan is a combination of a series of x-rays taken at different angles. Using a computer, three-dimensional images of the internal organs scanned are then created. An MRI (magnetic resonance imaging), on the other hand, uses magnetic fields and radio waves to create a detailed image of the body’s soft tissues and bones. Both of the procedures are completely painless.
Which is better?
While both MRIs and CT scans are used to create images of the internal organs and bones, there are a few major differences that effect which one a doctor will order. CT scans tend to be quick and can be used during emergencies while MRI scans can take a while to complete. Since the patient is inside of the MRI machine throughout the procedure, this can create a feeling of claustrophobia. However, the resulting image is much more detailed than what you would have using a CT scan.
The other major difference between the two procedures is the price. An MRI costs about twice as much as a CT scan. As a result, a CT scan is generally used first when diagnosing a patient. If this is unable to give enough information to confirm a diagnosis, an MRI may be recommended.
To learn more about CT scans and MRIs, make sure to check out our blogs in What to Expect for an MRI Appointment and What to Expect for a CT Scan.
