CT (AKA CAT scan)

Question 1

What is a CT scan?

Answer 1

provides cross-section image of all tissues scanned based on the tissue density compared to water

Question 2

Tomography

Answer 2

cut or section

Question 3

CT scan uses ____________.

Answer 3

radiation

Question 4

How does a CT scan work?

Answer 4

tube emits a fan shaped beam of x-rays rotating 360*; a 3-D image is created

Question 5

What is necessary for a CT scan?

Answer 5

anesthesia is necessary

Question 6

What is a hounsfield unit?

Answer 6

density measurement that affects how images are displayed in terms of brightness and contrast

Question 7

How do objects that measure below 750HU appear?

Answer 7

appear black

Question 8

How do objects that measure above 1250HU appear?

Answer 8

appear white

Question 9

What does blood measure as?

Answer 9

80HU

Question 10

What is the scan field of view?

Answer 10

number of detectors covered by the x-ray beam

Question 11

What is the display field of view?

Answer 11

determines how much of the scan field is reconstructed into an image