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Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
pattern The algorithm ... are visible, the pattern ... the nodules are diffuse ... #NodularPattern ... #Nodular #Pattern
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... #Clinical #Diagnosis ... Radiology #Pulmonary #CTChest ... #Nodular #Pattern ... #NodularPattern
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... #Clinical #Radiology ... #HRCT #CTChest ... #Nodular #Pattern ... #Comparison #Table
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... #Clinical #Radiology ... #HRCT #CTChest ... LowAttenuation #Cystic #Pattern ... #Comparison #Table
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... #Clinical #Radiology ... #HRCT #CTChest ... LowAttenuation #Cystic #Pattern ... #Comparison #Table
Miliary Pattern - Chest Radiology
 • Miliary opacities are scattered, small (1 -4 mm) nodules
 •
Miliary Pattern ... mm) nodules • Diffusely ... PulmPEEPs #Miliary #Pattern ... pulmonary #CXR #clinical ... #CT
Tree-in-Bud Sign on Chest CT
 • Multiple centrilobular nodules arranged in a linear branching pattern.
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CT • Multiple ... centrilobular nodules ... linear branching pattern ... TreeInBud #Sign #CT ... diagnosis #radiology #clinical
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
with ground glass pattern ... presents with centrilobular ... confluent, HRCT shows diffuse ... #Clinical #Radiology ... #CTChest #GGO #
Fleischner Society recommendations for follow-up of nodules
Previous chest radiographs should be reviewed to determine if the
nodules Previous chest ... lesion has been stable ... with a benign pattern ... mm depends on clinical ... Management #Radiology #CTChest