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radiology ctchest clinical diagnosis comparison pattern differential table ild lowattenuation nodular nodularpattern algorithm chronic cystic chestct cxr cysts eosinophilic fibrosis
Upper lung zone preference is seen in: - Inhaled particles: pneumoconiosis (silica or coal) - Smoking related diseases
related diseases (centrilobular ... emphysema - Respiratory ... #Pulmonary #HRCT ... Differential #Table #Distribution ... #Upper #Lower #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions. These include: - Emphysema -
on the basis of HRCT ... #Pulmonary #CTChest ... #Differential #Diagram ... #Comparison #Honeycombing ... #SignetRing #RadiologyAssistant
Low Attenuation pattern (2) 1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Centrilobular emphysema ... cysts; smoking history ... #HRCT #CTChest ... Cystic #Pattern #Comparison ... #Table #RadiologyAssistant
The distribution of nodules shown on HRCT is the most important factor in making an accurate
nodules shown on HRCT ... Centrilobular distribution ... #Pulmonary #HRCT ... Perilymphatic #Comparison ... #Diagram #RadiologyAssistant
Low Attenuation pattern 1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Centrilobular emphysema ... #Clinical #Radiology ... #HRCT #CTChest ... Cystic #Pattern #Comparison ... #Table #RadiologyAssistant
Algorithm for nodular pattern The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following: - Look
perilymphatic, random and centrilobular ... is likely centrilobular ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... Differential #Algorithm #RadiologyAssistant
On the left some diseases with a nodular pattern. 1. Hypersensitivity pneumonitis: ill defined centrilobular nodules. 2. Miliary
perilymphatic distribution ... perilymphatic distribution ... #Pulmonary #CTChest ... #Differential #Comparison ... #Table #RadiologyAssistant
Ground-glass opacity Ground-glass opacity (GGO) represents: - Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
resolution of the HRCT ... , NSIP, DIP. - Centrilobular ... distribution: Hypersensitivity ... #Pulmonary #CTChest ... #Differential #RadiologyAssistant
Basic Interpretation A structured approach to interpretation of HRCT involves the following questions: What is the dominant HR-pattern: reticular nodular high
interpretation of HRCT ... low attenuation (emphysema ... secondary lobule (centrilobular ... #Pulmonary #HRCT ... Algorithm #ILD #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right) Differential diagnosis of Hypersensitivity Pneumonitis. Subacute stage: - RB-ILD: seen in
associated with centrilobular ... emphysema. - Alveolar ... show very similar HRCT ... strong lower zone distribution ... #CTChest #UIP #Comparison
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