CT-SMITH

Question 1

how do CT scans work?

Answer 1

-use thinly collimated X ray beams arranged circumferentially around the body

Question 2

Axial CT scan positioning

Answer 2

• feet perpendicular to gantry table
• knees extended w/feet together
• foot board/tape used to maintain position
• tube CAN be angeled if proper position cant be obtained

Question 3

Coronal CT scan

Answer 3

• knees flexed w/ feet against gantry table

- foot boards/tape used

Question 4

whats the size of the most common slice thickness?

Answer 4

5-10mm

-a decrease of slice sizes means an increase in the amount of xrays done to achieve an image

Question 5

radiation exposure w/ CT scans

Answer 5

-dose: 1-3 rads!!
- for 20 slices is about 2.6 rads
note for xrays 5 images its 0.1rads

Question 6

when do you use CT scans?

Answer 6

-to look at bones more than soft tissue