Flashcards in Chest radiology I Deck (18)
what are the 4 radiographic densities?
soft tissue (water)
do high density objects absorb more or less photons? how does it appear?
white (ie bone)
do low density objects absorb more or less photons? how does it appear?
black (ie lungs)
should radiographs be performed in full inspiration or expiration?
for reference, where should the midpoint of the right hemidiaphragm align?
posterior 9th or 10th ribs
how does the spine appear on lateral film, superior to inferior?
darkens superior to inferior - spine sign
what are the CV borders?
left brachiocephalic vein
left common carotid artery
left subclavian artery
right brachiocephalic artery
right brachiocephalic vein
definition: interlobar fissure
space between the lobes where the visceral pleural surfaces touch
how are fissures visualized? how are the major fissures seen best?
photon beam must be parallel to fissure
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
what are the contents of the AP window?
left recurrent laryngeal nerve
what are the 3 clear spaces?
what are the 5 Ts (common diseases) of the retrosternal space?
what are the common diseases of the retrotracheal space?
what are the common diseases of the retrocardiac space?
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
which hilum is more superior in 97% of cases?