Chest radiology I Flashcards Preview

Year 2 Respiratory > Chest radiology I > Flashcards

Flashcards in Chest radiology I Deck (18)
1

what are the 4 radiographic densities?

soft tissue (water)
fat
air
bone (calcium)

2

do high density objects absorb more or less photons? how does it appear?

more

white (ie bone)

3

do low density objects absorb more or less photons? how does it appear?

less

black (ie lungs)

4

should radiographs be performed in full inspiration or expiration?

inspiration

5

for reference, where should the midpoint of the right hemidiaphragm align?

posterior 9th or 10th ribs

6

how does the spine appear on lateral film, superior to inferior?

darkens superior to inferior - spine sign

7

what are the CV borders?

left brachiocephalic vein
left common carotid artery
left subclavian artery
right brachiocephalic artery
right brachiocephalic vein

8

definition: interlobar fissure

space between the lobes where the visceral pleural surfaces touch

9

how are fissures visualized? how are the major fissures seen best?

photon beam must be parallel to fissure

lateral view

10

where is the aortopulmonary (AP) window?

crescentic shaped lucency between the inferior border of the aortic arch and the superior border of the left pulmonary artery

11

what are the contents of the AP window?

lymph nodes
left recurrent laryngeal nerve
fat

12

what are the 3 clear spaces?

retrosternal
retrotracheal
retrocardiac

13

what are the 5 Ts (common diseases) of the retrosternal space?

"terrible" lymphoma
thymoma
teratoma
thyroid
thoracic AA

14

what are the common diseases of the retrotracheal space?

vascular abnormalities
esophageal disease
lung cancer

15

what are the common diseases of the retrocardiac space?

hiatal hernia
esophageal disease
LV enlargement
pneumonia

16

what is the cardiothoracic ratio? what is normal? when is it valid?

maximum transverse diameter of the heart to the diameter of the chest as measured at the highest level of the right hemidiaphragm

normal - 0.5

only valid on PA chest

17

which hilum is more superior in 97% of cases?

left

18

which hemidiaphragm is more superior 89% of the time?

right