16 results
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... Lymphangiomyomatosis (LAM ... low attenuation areas ... Radiology #HRCT #CTChest ... #Table #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... low attenuation areas ... Lymphangiomyomatosis (LAM ... Radiology #HRCT #CTChest ... #Table #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Cystic LCH: - LAM ... : 'signet ring sign ... Diagnosis #Radiology #CTChest ... #Cystic #Cysts ... Comparison #Table #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Emphysema - Lung cysts ... (LAM, LIP, Langerhans ... Radiology #Pulmonary #CTChest ... Emphysema #SignetRing #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... before the typical cysts ... Radiology #Pulmonary #CTChest ... #Nodular #Pattern ... Comparison #Table #RadiologyAssistant
On the left a chest film of a 19 year old patient with Langerhans cell histiocytosis.
The
film of a 19 year old ... is a reticular patern ... caused by multiple cysts ... the central dot sign ... #RadiologyAssistant
On the left a patient with DIP.
The HRCT shows diffuse areas of ground-glass density in the
and some mosaic pattern ... abnormalities and signs ... Clinical #Radiology #CTChest ... DesquamativeInterstitialPneumonia #ILD ... #RadiologyAssistant
On the left a case with multiple cysts that are evenly distributed througout the lung (
with multiple cysts ... was a 40 year old ... Lymphangiomyomatosis (LAM ... Clinical #Radiology #CTChest ... #Pneumothorax #RadiologyAssistant
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 ... attenuation (emphysema, cystic ... Pulmonary #HRCT #CTChest ... Interpretation #Algorithm #ILD ... #RadiologyAssistant
Fever Patterns - Differential Diagnosis Framework

Continuous Fever:
Temp > 38°C with only 1 degree fluctuation in 24
Fever Patterns - ... Behcet's syndrome • Cyclic ... (Temp high in AM ... fever • Hyper-IgD ... Brucellosis Faget's Sign