Imaging - Goldschmidt

Question 1

Inventor of x-rays?

Answer 1

Roentgen

Question 2

by what mechanism to x-rays harm people?

Answer 2

Displaced electrons can harm tissue as can resultant free radicals!

Question 3

Radiation is measure by what unit?

Answer 3

sieverts (spelling?)

Question 4

Abdomen CT is the best screening tool for all abdominal problems except for:

Answer 4

gall bladder disease and abdominal pain in young women

but great for tumors, UTI, kidney stones etc.

Question 5

What is contrast used for in CT studies?

Answer 5

opacify bowels when taken orally

Opacify vessels when taken by IV

Question 6

Drawback to contrast?

Answer 6

Many experience allergic reactions, mild like hives or can be severe

In extreme cases can cause nephropathy

Question 7

What is the comparison of ionizing radiation between CT scans and MRI ?

Answer 7

MRI has no ionizing radiation

Question 8

Disadvantages to MRI?

Answer 8

expensive!
Claustrophobic
metal makes artifacts

Question 9

What is nuclear medicine?

Answer 9

Radio tracers are injected into the body and then visualized

Have less anatomical info, but good to test function of Gall Bladder or do bone scans

Question 10

What is a Barium Examination

Answer 10

Contrast placed in GI tract (oral or douche)

Way old fashioned, colonoscopy is just way better, even CT has replaced some things

Question 11

What is PET good for?

Answer 11

uses fluorine-labeled glucose to visualize abnormal metabolic activity in organs that might appear normal

You can also see tumors because they are fast-dividing and use lots of glucose

Question 12

Which test can be combined with PET for better visualization?

Answer 12

CT/PET allows you to see a lot of anatomy combined with sugar emtabolism info