14 results
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
pattern The algorithm ... and centrilobular ... distribution is likely centrilobular ... HRCT #CTChest #NodularPattern ... #RadiologyAssistant
The distribution of nodules shown on HRCT is the most important factor in making an accurate
in the nodular pattern ... In most cases small ... Pulmonary #HRCT #NodularPattern ... #Nodular #Pattern ... Comparison #Diagram #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... Miliary TB: random ... #NodularPattern ... Differential #Comparison #Table ... #RadiologyAssistant
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Miliary TB: random ... CTChest #Nodular #Pattern ... #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... Centrilobular emphysema ... Notice the centrilobular ... #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... Centrilobular emphysema ... LowAttenuation #Cystic #Pattern ... #Comparison #Table ... #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
- Metastases: random ... ring sign'. - Centrilobular ... Differential #Comparison #Table ... #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
there are four patterns ... low attenuation (table ... The cystic pattern ... seen and in many cases ... #Differential #RadiologyAssistant
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
the dominant HR-pattern ... secondary lobule (centrilobular ... perilymphatic or random ... Interpretation #Algorithm ... #ILD #RadiologyAssistant
Subacute hypersensitivity pneumonitis
The key findings in the subacute hypersensitivity pneumonitis are:
ill-defined centrilobular nodules of ground-glass opacity
are: ill-defined centrilobular ... opacity (80% of cases ... ) or mosaic pattern ... are ill-defined centrilobular ... #RadiologyAssistant