CT-SMITH Flashcards
1
Q
how do CT scans work?
A
-use thinly collimated X ray beams arranged circumferentially around the body
2
Q
Axial CT scan positioning
A
- 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
3
Q
Coronal CT scan
A
- knees flexed w/ feet against gantry table
- foot boards/tape used
4
Q
whats the size of the most common slice thickness?
A
5-10mm
-a decrease of slice sizes means an increase in the amount of xrays done to achieve an image
5
Q
radiation exposure w/ CT scans
A
-dose: 1-3 rads!!
- for 20 slices is about 2.6 rads
note for xrays 5 images its 0.1rads
6
Q
when do you use CT scans?
A
-to look at bones more than soft tissue
