Imaging Flashcards
ILD
COPD - emphysema
NRDS
ground glass and low lung volumes
ILD
ILD
consolidated lobar pneumonia with empyema
pleural effusion
ARDS: bilateral opacities
ARDS (L); normal (R)
Which lobe(s) can silhouette the RH border?
RML or RLL
Which lobe(s) can silhouette the LH border?
Lingula of LUL
Which lobe(s) can silhouette the posterior heart border and/or posterior L hemidiaphragm?
LLL
Which lobe(s) can silhouette the anterior R hemidiaphragm?
RML
Which lobes can silhouette the posterior R hemidiaphragm?
RLL
Interpretation of a silhouette sign
Atelectasis or consolidation
Atelectasis: upward displacement of minor fissure due to RUL collapse w/ mediastinal silhouette sign.
Resorption atelectasis of LUL caused by tumor compressing airway; tracheal/mediastinal shift towards collapse
LLL pneumonia; consolidation w/ silhouette sign
Consolidation due to cardiogenic pulmonary edema (silhouette sign)
Atelectasis vs. consolidation?
Both produce airless lung; atelectasis causes decreased lung volume, while consolidation does not.
air bronchogram: seen with consolidation or atelectasis
Interstitial fibrosis: perilymphatic interstitial fluid, forming Kerley B lines in secondary septations between lobules.
Pulmonary fibrosis, causing reduced lung volume
emphysema
Pleural effusion: opacity spanning enitre chest, loss of RML volume due to compression, and meniscus
sarcoidosis
Sarcoidosis: adenopathy
lymphoma
Lymphoma
