CT scans use X-rays to create detailed images of structures inside the body, while MRIs use magnetic fields and radio waves, and both have advantages and disadvantages. CT scans are quicker, cheaper, and better for bone structures, but expose patients to radiation, while MRIs do not use radiation but are more expensive, lengthy, and have stricter safety requirements. Overall, the document compares the uses of CT and MRI scans and their respective benefits and drawbacks.

1. Presented by :
Ajay Nagisetti

2. What is a CT Scan?
 A Computed Tomography (CT) scan uses X-rays to
make detailed pictures of structures inside of the body.

3. What is a MRI Scan?
 Magnetic resonance imaging (MRI) is a test that
uses a magnetic field and pulses of radio wave energy
to make pictures of organs and structures inside the
body.

5. CT MRI

6. CT MRI

7. Advantages to CT
 Quick and painless
 Costs less than MRI
 Better availability compared to MRI
 Shows up acute bleed
 Good visualization of bony structures and calcified
lesions
 Can detect or exclude the presence of more serious
problems

8. Disadvantages to CT
 Exposure to ionising radiation
 Resolution
 Beam-hardening artifact
 Injection of a contrast medium (dye) can cause kidney
problems or result in allergic or injection-site reactions
in some people
 Some procedures require anaesthesia

9. Advantages to MRI
 No radiation exposure
 Good resolution
 3-D reconstruction
 Good gray-white differentiation
 Adjust settings based on characteristics of the lesion
 Gadolinium contrast is relatively nontoxic

10. Disadvantages to MRI
 Cost
 Some patients ineligible because of pacemakers, other
metal
 Claustrophobia
 Lengthy and noisy procedure
 Limited availability