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Fig. 1B. —51-year-old man with emphysema. Ten-millimeter-thick CT
images with 0.61-mm pixel dimensions obtained 3 months after lung volume
reduction surgery were used to determine superior and inferior aspects of
intrathoracic trachea. CT image depicts fleshy median at tracheal bifurcation.
Scan 30 mm superior to this one was identified as inferior aspect of
intrathoracic trachea in an effort to eliminate tracheal changes resulting
from bifurcation of trachea.
