28 results
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
: Mosaic pattern ... atenuation and areas ... shows a mosaic pattern ... Radiology #CXR #CTChest ... Chronic #Fibrosis #RadiologyAssistant
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Hypersensitivity ... pneumonitis: ill ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
Hypersensitivity ... pneumonitis: ill ... before the typical cysts ... Radiology #Pulmonary #CTChest ... Comparison #Table #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... low attenuation areas ... Radiology #HRCT #CTChest ... #Pattern #Comparison ... #Table #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... low attenuation areas ... Radiology #HRCT #CTChest ... #Pattern #Comparison ... #Table #RadiologyAssistant
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Patterns - Differential ... Pneumonitis, Respiratory ... Antitripsyn Def • Cysts ... Infection, Aspiration, Cystic ... #CT #Patterns #
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
in ground glass pattern ... distribution: Hypersensitivity ... pneumonitis, Respiratory ... Radiology #Pulmonary #CTChest ... #Differential #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
On a Chest X-Ray ... The cystic pattern ... When the cysts have ... in many cases UIP ... #Differential #RadiologyAssistant
Here another case of hypersensitivity pneumonitis.
There is a mosaic pattern.
Some secundary lobules demonstrate ground-glass opacity due
pneumonitis. ... There is a mosaic pattern ... Clinical #Radiology #CTChest ... #Hypersensitivity ... #GroundGlass #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Emphysema - Lung cysts ... (LAM, LIP, Langerhans ... Radiology #Pulmonary #CTChest ... Emphysema #SignetRing #RadiologyAssistant