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Lung Segment Anatomy Annotated on Chest CT
Right Lung:
 • Upper Lobe: Apical, Posterior, Anterior
 • Middle
• Middle Lobe: Lateral ... Medial, Anterior, Lateral ... Anteromedial, Lateral ... radiopaedia.org/cases ... #CT #CTChest #pulmonary
Cardiac incisura
Click image to enlarge.
On the right side of the chest the lung will lie against
right side of the chest ... This causes a density ... anteroinferior side on the lateral ... Radiology #CXR #Lateral ... Cardiac #Incisura #RadiologyAssistant
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
with peripheral areas ... presenting as areas ... with peripheral areas ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
The PA-film shows a silhouette sign of the left heart border.
Even without looking at the lateral
looking at the lateral ... to a pneumonia caused ... SilhouetteSign #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
low attenuation areas ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
you think of the causes ... the alveoli and cause ... Radiology #Pulmonary #CTChest ... #Differential #RadiologyAssistant
Hilar enlargement
The table summarizes the causes of hilar enlargement.
Normal hili are:
- Normal in position - left
summarizes the causes ... Differential #Unilateral #Bilateral ... #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
low attenuation areas ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
Proptosis - Differential Diagnosis - Unilateral vs Bilateral
Unilateral:
 • Infections (can become bilateral with cavernous sinus
Unilateral vs Bilateral ... Sarcoid (can be bilateral ... - Metastatic (breast ... histocytosis Bilateral ... #Causes #ophthalmology
Lobar pneumonia
On the chest x-ray there is an ill-defined area of increased density in the right
pneumonia On the chest ... include the list of causes ... lobar pneumonia caused ... Lobar #Pneumonia #RadiologyAssistant