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High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
COP, Chronic Eos PNA ... Lymphocytic Int PNA ... Honeycombing: Idiopathic Pulmonary ... Differential #Diagnosis #pulmonary ... #radiology
Tree-in-Bud Sign on Chest CT
 • Multiple centrilobular nodules arranged in a linear branching pattern.
 •
NTM, atypical pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
Head Cheese Sign on Chest CT
 • Juxtaposition of distinct radiographic areas of low, normal and
RB, Mycoplasma pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
Tram Track Sign on Chest CT
 • Parallel, non-tapering airways, extending to the lung periphery.
 •
ILD, necrotizing pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
CT Angiogram Sign on Chest CT
 • Prominent pulm vessels traversing through an area of parenchymal
post-obstructive pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
Air Bronchogram Sign on Chest CT
 • Patent airways surrounded by opacified lung
 • DDx: pna,
opacified lung • DDx: pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
Atoll Sign (Reverse-Halo Sign) on Chest CT
 • Central GGO surrounded by a crescentic or circumferential
LG, GPA, lipoid pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
Crazy Paving on Chest CT
 • Thickened interlobular septa in a background of diffuse GGO's.
 •
sarcoidosis, lipoid pna ... Sign #CT #Lung #Pulmonary ... #diagnosis #radiology
Signs of Pulmonary Hypertension on Chest CT
 • Main PA is dilated and larger than the
Signs of Pulmonary ... Chest CT • Main PA ... crossover sign - Right PA ... @PulmPEEPs #Pulmonary ... ChestCT #CTChest #Radiology
Patent Ductus Arteriosus (PDA) on Echocardiogram

Another great teaching clip, this time a patent ductus arteriosus (PDA).
Ductus Arteriosus (PDA ... ductus arteriosus (PDA ... Continuous Ao-to-PA ... Ductus #Arteriosus #PDA ... Echocardiogram #cardiology