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Lung Segment Anatomy Annotated on Chest CT
Right Lung:
 • Upper Lobe: Apical, Posterior, Anterior
 • Middle
Lung Segment Anatomy ... CT Right Lung: ... #CT #CTChest #pulmonary ... #clinical #radiology ... #Anatomy
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
CT • Distinct ... pulmonary vessel ... leading into a ... #Lung #Pulmonary ... diagnosis #radiology #clinical
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
CT • SPN or mass ... surrounded by a ... #Halo #Sign #CT ... #Lung #Pulmonary ... diagnosis #radiology #clinical
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Hypoventilation: CNS of Respiratory ... Left Shunt - Anatomic ... Embolism, Obstructive Lung ... , Interstitial Lung ... Hypoxia #hypoxemia #differential
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) 
- Respiratory symptoms must have begun within one
known clinical insult ... consistent with pulmonary ... chest radiograph ... computed tomographic (CT ... lobar collapse, lung
Monod Sign on Chest CT
 • Air surrounding a fungal ball in a preexisting pulmonary cavity
CT • Air surrounding ... a fungal ball in ... a preexisting pulmonary ... #Lung #Pulmonary ... diagnosis #radiology #clinical
Bronchus Sign on Chest CT
 • Airway leading directly to a peripheral lung nodule or mass
CT • Airway leading ... directly to a peripheral ... lung nodule or ... #Lung #Pulmonary ... diagnosis #radiology #clinical
Miliary Pattern - Chest Radiology
 • Miliary opacities are scattered, small (1 -4 mm) nodules
 •
throughout the lungs ... hematogenous spread of a ... #diagnosis #pulmonary ... #CXR #clinical ... #CT
Cheerio Sign (Open Bronchus Sign) on Chest CT
 • Pulmonary nodule with a central lucency
 •
CTPulmonary ... nodule with a central ... and metastatic lung ... #Lung #Pulmonary ... diagnosis #radiology #clinical
Mosaic Attenuation on Chest CT
 • Variable attenuation seen on a chest CT in a lobular
CT • Variable ... attenuation seen on a ... chest CT in a lobular ... #Lung #Pulmonary ... diagnosis #radiology #clinical