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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... result in decreased lung ... - Emphysema - Lung ... #Diagnosis #Radiology ... Differential #Diagram #Comparison
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
or interstitial lung ... in ground glass pattern ... predominance: Respiratory ... Hypersensitivity pneumonitis, Respiratory ... bronchiolitis #Diagnosis #Radiology
Balloon Visualization - Mechanical Ventilation Pressures - PIP, PPlat, PEEP

Peak Inspiratory Pressure (PIP): Dynamic pressure needed
, PEEP Peak Inspiratory ... fully inflate the lung ... forces of the lung ... which reflects lung ... #PPlat #PEEP #CriticalCare
If your PIP and Plateau are both elevated then this indicates lung disease and decreased compliance
If your PIP and ... this indicates lung ... compliance of the lung ... #Diagnosis #CriticalCare ... #Inspiratory #Pressure
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
in interstitial lung ... there are four patterns ... is interstitial lung ... in many cases UIP ... #Diagnosis #Radiology
Nodular pattern(2)
1. Sarcoidosis: nodules with perilymphatic distribution, along fissures, adenopathy.
2. TB: Tree-in-bud appearance in a patient
Nodular pattern( ... Respiratory bronchiolitis ... #Clinical #Radiology ... CTChest #Nodular #Pattern ... #Comparison #Table
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung ... Lymphangiomyomatosis, LIP ... Clinical #Diagnosis #Radiology ... CTChest #Cystic #Comparison ... #LAM #LIP #Histiocytosis
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... centrilobular emphysema - Respiratory ... is seen in: - UIP ... edema #Diagnosis #Radiology
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
responses of the lung ... involvement of the lung ... have specific patterns ... realise, that these patterns ... #Diagnosis #Radiology
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... Respiratory bronchiolitis ... Clinical #Diagnosis #Radiology ... CTChest #Nodular #Pattern ... #Differential #Comparison