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Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis on HRCT ... disease comes from HRCT ... On HRCT there are ... On a Chest X-Ray ... #Pulmonary #CXR
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Interstitial - Reticular ... - Emphysema ... #Diseases #Radiology ... #Patterns #Lung ... #CXR #XRay #ChestCT
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
result in decreased lung ... - Lung cysts (LAM ... on the basis of HRCT ... #Diagnosis #Radiology ... #Pulmonary #CTChest
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... (centrilobular emphysema ... edema #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #Table
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
histologic pattern of pulmonary ... On a chest X-ray ... A HRCT is needed ... HRCT demonstrated ... #CXR #UIP #Reticular
The CXR demonstrates a reticular interstitial pattern with a preference at the lung bases.
The HRCT demonstrates
The CXR demonstrates ... preference at the lung ... The HRCT demonstrates ... #Clinical #Radiology ... #CXR #UIP #CTChest
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
we describe a chest ... visible wall #CXR ... #Differential #Table ... #Pulmonary #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 ... dominant HR-pattern: reticular ... low attenuation (emphysema ... #Pulmonary #HRCT ... #CTChest #Interpretation
Reticular pattern 
1. Lymphangitic carcinomatosis: irregular septal thickening, usually focal or unilateral 50% adenopathy', known carcinoma.
2.
Reticular pattern ... incidental finding in HRCT ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
Thickening of the lung ... differential diagnosis (Table ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #CTChest #Reticular