Size and Morphology of the Trachea Before and After Lung Volume Reduction Surgery
Joseph K. Leader1,
Robert M. Rogers2,
Carl R. Fuhrman1,
Frank C. Sciurba2,
Bin Zheng1,
Paul F. Thompson2,
Joel L. Weissfeld3,
Sara K. Golla1 and
David Gur1
1 Department of Radiology, Imaging Research Division, University of Pittsburgh,
300 Halket St., Ste. 4200, Pittsburgh, PA 15213.
2 Department of Medicine, Division of Pulmonary, Allergy and Critical Care
Medicine, University of Pittsburgh, Pittsburgh, PA 15213.
3 Departments of Medicine and Epidemiology and University of Pittsburgh Cancer
Institute, University of Pittsburgh, Pittsburgh, PA 15213.
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Fig. 1A. —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 lateral aspect of right first rib,
which was identified as superior aspect of intrathoracic trachea. Air column
of trachea is outlined, and sagittal and coronal dimensions are illustrated as
crosshairs within trachea. Tracheal parameters were sagittal dimension, 21.20
mm; coronal dimension, 18.81 mm; tracheal index, 0.89; circularity index,
0.95; and area, 340.56 mm2.
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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.
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Fig. 2A. —69-year-old man with emphysema. Ten-millimeter-thick CT
images with 0.63 pixel dimensions before and 3 months after lung volume
reduction surgery depict saber-sheath trachea. Air column of trachea is
outlined, and sagittal and coronal dimensions are illustrated as crosshairs
within outlined trachea. Before lung volume reduction surgery, tracheal
parameters were sagittal dimension, 21.22 mm; coronal dimension, 12.28 mm;
tracheal index, 0.58; circularity index, 0.82; and area, 235.16
mm2. Note that long axis of trachea is not parallel to sagittal
plane but was termed "sagittal dimension."
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Fig. 2B. —69-year-old man with emphysema. Ten-millimeter-thick CT
images with 0.63 pixel dimensions before and 3 months after lung volume
reduction surgery depict saber-sheath trachea. Air column of trachea is
outlined, and sagittal and coronal dimensions are illustrated as crosshairs
within outlined trachea. After lung volume reduction surgery, tracheal
parameters were sagittal dimension, 23.88 mm; coronal dimension, 13.14 mm;
tracheal index, 0.55; circularity index, 0.80; and area, 282.42
mm2.
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Copyright © 2004 by the American Roentgen Ray Society.
