15 results
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Lung cysts (LAM ... histiocytosis) - Bronchiectasis ... on the basis of HRCT ... #Diagnosis #Radiology ... Differential #Diagram #Comparison
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
(LAM): uniform cysts ... Centrilobular emphysema ... #Clinical #Radiology ... #HRCT #CTChest ... #Pattern #Comparison
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Centrilobular emphysema ... (LAM): regular cysts ... #Clinical #Radiology ... #HRCT #CTChest ... #Pattern #Comparison
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... bronchiectasis: ... Centrilobular emphysema ... #Radiology #CTChest ... #Differential #Comparison
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
with traction bronchiectasis ... result of massive fibrosis ... #Clinical #Radiology ... #HRCT #CTChest ... HighAttenuation #Pattern #Comparison
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... on HRCT Most of ... disease comes from HRCT ... On HRCT there are ... #Diagnosis #Radiology
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 ... , cystic) Where ... ) #Diagnosis #Radiology ... #Pulmonary #HRCT
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
- Differential Diagnosis ... Attenuation: • Emphysema ... Antitripsyn Def • Cysts ... Sarcoidosis • Bronchiectasis ... #pulmonary #radiology
HRCT findings in UIP
Honeycombing consisting of multilayered thick-walled cysts.
Architectural distortion with traction bronchiectasis due to fibrosis.
Predominance
HRCT findings in ... multilayered thick-walled cysts ... with traction bronchiectasis ... due to fibrosis ... lymphadenopathy #Clinical #Radiology
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the differential diagnosis ... emphysematous bullae ... with end-stage fibrosis ... #Radiology #CTChest ... Emphysema #Comparison