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Here are the most common examples of these four patterns on a chest x-ray (click image
of these four patterns ... - Diffuse consolidation ... Interstitial - ... - Multiple Masses ... #Patterns #RadiologyAssistant
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular ... pattern The algorithm ... are visible, the pattern ... are diffuse and ... #Nodular #Pattern
The distribution of nodules shown on HRCT is the most important factor in making an accurate
pattern. ... In most cases small ... peribronchovascular interstitium ... Pulmonary #HRCT #NodularPattern ... #Nodular #Pattern
Whenever you see an area of increased density within the lung, it must be the result
of these four patterns ... . 1- Consolidation ... resulting in lobar, diffuse ... opacities. 2- Interstitial ... #Patterns #RadiologyAssistant
Sarcoidosis
On a CXR sarcoidosis usually first presents with hilar and mediastinal lymphadenopathy (example).
Parenchymal disease can present
can present as consolidation ... or even as masses ... they may resemble consolidation ... #Interstitial # ... Pattern #Sarcoidosis
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
High-Res Chest CT Patterns ... Lymphangitic Carcinoma, Interstitial ... Low Attenuation Nodular ... : • Random: Metastases ... HighRes #Chest #CT #Patterns
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
Unknown • 6-7 cases ... and GG pattern, ... irregular lines, nodular ... • HRCT: patchy consolidation ... Pulmonary lymphoma, Diffuse
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 ... : reticular nodular ... (ground-glass, consolidation ... perilymphatic or random ... Interpretation #Algorithm
Key findings in alveolar proteinosis
- Crazy paving pattern: reticular pattern superimposed on ground glass opacification.
- Opacifications
- Crazy paving pattern ... : reticular pattern ... ground glass to consolidation ... This is caused by ... transported to the interstitium
Acute interstitial pneumonia (AIP, earlier named Hamman Rich Pneumonitis) is a rare idiopathic lung disease characterized
Acute interstitial ... characterized by diffuse ... The histologic pattern ... characteristics are diffuse ... or patchy consolidation