11 results
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... Honeycombing 4. ... #Clinical #Radiology ... #Pattern #Comparison ... #Table #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... Honeycombing. 4. ... #Clinical #Radiology ... #Pattern #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 ... low attenuation pattern ... #Diagnosis #Radiology ... Emphysema #SignetRing #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
low attenuation (table ... The cystic pattern ... histiocytosis or honeycombing ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation pattern ... bronchiectasis, no honeycombing ... #Clinical #Radiology ... #Comparison #Table ... #RadiologyAssistant
Honeycombing represents the second reticular pattern recognizable on HRCT.
Because of the cystic appearance, honeycombing is also
second reticular pattern ... Because of the cystic ... low attenuation pattern ... #Clinical #Radiology ... UsualInterstitialPneumonia #RadiologyAssistant
Nodular pattern(2)
1. Sarcoidosis: nodules with perilymphatic distribution, along fissures, adenopathy.
2. TB: Tree-in-bud appearance in a patient
Nodular pattern( ... before the typical cysts ... #Clinical #Radiology ... #Comparison #Table ... #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 ... Clinical #Diagnosis #Radiology ... Differential #Comparison #Table ... #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 ... bronchiectasis) #Diagnosis #Radiology ... Interpretation #Algorithm ... #ILD #RadiologyAssistant
Preoperative Risk Evaluation

Major Pre-Op Questions:
1. Does the patient have any modifiable risk factors that could be
Key Components: ... physical exam - Key components ... event, follow ACC algorithm ... one post op Cardiology ... medical and surgical management