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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 ... Most diseases with ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Emphysema #SignetRing #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... in interstitial lung ... we are dealing with ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
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 ... bronchiolitis #Diagnosis ... #Radiology #Pulmonary ... #CTChest #GGO #
Here another case of hypersensitivity pneumonitis.
There is a mosaic pattern.
Some secundary lobules demonstrate ground-glass opacity due
There is a mosaic pattern ... opacity due to lung ... #Clinical #Radiology ... #CTChest #Hypersensitivity ... #RadiologyAssistant
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
different patients with ... lung cysts. ... #Clinical #Diagnosis ... #Radiology #CTChest ... Histiocytosis #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
vascular diseases (e.g ... instance in patients with ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... ILD #Findings #RadiologyAssistant
COVID-19 Chest CT - Case 4

Main aspects of the image: multiple opacities in the glass and
periphery of two lungs ... a multilobular pattern ... Radiologia Torácica ... COVID19 #SARSCoV2 #CTChest ... #CriticalCare #GroundGlass
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On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
a nodular pattern ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... #CTChest #Nodular ... Comparison #Table #RadiologyAssistant
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular pattern ... you are dealing with ... #Diagnosis #Radiology ... Pulmonary #HRCT #CTChest ... Differential #Algorithm #RadiologyAssistant
Hilar and mediastinal lymphadenopathy
In sarcoidosis the common pattern is right paratracheal and bilateral hilar adenopathy ('1-2-3-sign').
In
sarcoidosis the common pattern ... In lung carcinoma ... occurs in patients with ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant