Chest radiology I Flashcards
what are the 4 radiographic densities?
soft tissue (water)
fat
air
bone (calcium)
do high density objects absorb more or less photons? how does it appear?
more
white (ie bone)
do low density objects absorb more or less photons? how does it appear?
less
black (ie lungs)
should radiographs be performed in full inspiration or expiration?
inspiration
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
lateral view
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?
lymph nodes
left recurrent laryngeal nerve
fat
what are the 3 clear spaces?
retrosternal
retrotracheal
retrocardiac
what are the 5 Ts (common diseases) of the retrosternal space?
"terrible" lymphoma thymoma teratoma thyroid thoracic AA
what are the common diseases of the retrotracheal space?
vascular abnormalities
esophageal disease
lung cancer
what are the common diseases of the retrocardiac space?
hiatal hernia
esophageal disease
LV enlargement
pneumonia
