A Few Random Radiographic Pearls

• cavitary lesion wall thickness

>10mm = CA

5-10mm = 50%CA, 50%infx

0- 5 mm = infection

• carina angle, nl = 50-70(90)°

• PA interlobar artery size= <18mm

azygous upright =< 7mm

supine =< 15mm

• Solitary Pulm Nodule double volume = 28% increase in diameter

doubling time of CA = 25-450 days

mean = 120 days

• right pneumotx in women >25-30 yrs old --- think CATAMENIAL PTX

See also differential diagnosis of apical or basilar pulmonary opacities