Felson's Principles of CXR

Question 1

heart & vessels lrger, lungs whiter –> in what kind of images (2)

Answer 1

• expiratory image

- AP supine

Question 2

PA –> R ant oblique –> ant struct –> mv medial or lat?

Answer 2

lat

Question 3

how is absorption related to penetration

Answer 3

absorption = 1/penetration

Question 4

unit for CT density

Answer 4

hounsfield units

Question 5

housfield units of air

Answer 5

-1000

Question 6

housfield units of water

Answer 6

0

Question 7

housfield units of soft tissue

Answer 7

+40

Question 8

radiography & CT utilize what kind of energy?

Answer 8

ionizing radiation

Question 9

what is bright on T1 weighted MRI?

Answer 9

fat

Question 10

what is bright on T2 weighted MRI?

Answer 10

simple fluid

Question 11

what is used as contrast in MRI?

Answer 11

gadolinium

Question 12

what is used as contrast in XR/CT?

Answer 12

iodine

Question 13

lung scan evaluates what?

Answer 13

pulm perfusion

Question 14

lung scan –> uses what material to image?

Answer 14

radioisotope (technetium 99m) –> tagged to albumin

Question 15

PET –> uses what material to image?

Answer 15

isotope –> joined to carrier (F 18 glucose)