280.All are true regarding
ground glass opacity except
a.increase in lung density
b.presevation of bronchoalveolar markings on CT
c. obscuration of vessel markings on chest x ray
d. indicate disease within the airspaces only
e. ‘black bronchus’ sign
ANS---d---
Ground glass opacity indicate disease within the airspaces and/or the interstitium.It may or may not be an associated with air bronchogram. In cases of uncertainty, comparison of the (air) density within airways with that of lung parenchyma (the ‘black bronchus’ sign) may be useful, normally the two densities are roughly comparable. .(CHAPTER 21 – Airspace Diseases,Adam: Grainger & Allison's Diagnostic Radiology, 5th ed)
IMAGE SOURCE--
a.increase in lung density
b.presevation of bronchoalveolar markings on CT
c. obscuration of vessel markings on chest x ray
d. indicate disease within the airspaces only
e. ‘black bronchus’ sign
ANS---d---
Ground glass opacity indicate disease within the airspaces and/or the interstitium.It may or may not be an associated with air bronchogram. In cases of uncertainty, comparison of the (air) density within airways with that of lung parenchyma (the ‘black bronchus’ sign) may be useful, normally the two densities are roughly comparable. .(CHAPTER 21 – Airspace Diseases,Adam: Grainger & Allison's Diagnostic Radiology, 5th ed)
IMAGE SOURCE--
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