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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 ... #CT #CTChest #pulmonary ... #clinical #radiology
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... edema #Diagnosis #Radiology ... #Pulmonary #HRCT ... #ChestCT #Differential ... #Upper #Lower #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Emphysema - Lung ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... LowAttenuation #Differential ... Emphysema #SignetRing #RadiologyAssistant
Batwing
A bilateral perihilar distribution of consolidation is also called a Batwing distribution.
The sparing of the periphery
Batwing A bilateral ... most typical of pulmonary ... #Diagnosis #Radiology ... #CXR #Batwing #Differential ... #RadiologyAssistant
Hilar and mediastinal lymphadenopathy
In sarcoidosis the common pattern is right paratracheal and bilateral hilar adenopathy ('1-2-3-sign').
In
In lung carcinoma ... #Diagnosis #Radiology ... #Pulmonary #Mediastinal ... Lymphadenopathy #Differential ... #RadiologyAssistant
The PA-film shows a silhouette sign of the left heart border.
Even without looking at the lateral
looking at the lateral ... anteriorly in the left lung ... #Clinical #Radiology ... SilhouetteSign #RadiologyAssistant
Cardiac incisura
Click image to enlarge.
On the right side of the chest the lung will lie against
the chest the lung ... inferior part of the lung ... #Clinical #Radiology ... #CXR #Lateral # ... Cardiac #Incisura #RadiologyAssistant
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
- Lung neoplasms ... proteinaceous material ... #Diagnosis #Radiology ... #Pulmonary #CXR ... #RadiologyAssistant
Bilateral B-Lines in case of Pneumonia on Lung POCUS

Young healthy pt with fever/dyspnea. POCUS lung exam
Bilateral B-Lines ... Differential Bilat ... : Pulmonary edema ... Bilateral B-lines ... #POCUS #clinical
Tree-in-bud
In centrilobular nodules the recognition of 'tree-in-bud' is of value for narrowing the differential diagnosis.
Tree-in-bud describes
narrowing the differential ... identified in the lung ... Diagnosis #Pathophys #Radiology ... #Pulmonary #CTChest ... TreeInBud #Diagram #RadiologyAssistant