11 results
The distribution of nodules shown on HRCT is the most important factor in making an accurate
shown on HRCT is ... Random refers to ... peribronchovascular interstitium ... Nodules are randomly ... Radiology #Pulmonary #HRCT
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
perilymphatic, random ... pattern is either random ... bronchovascular interstitium ... it is likely a random ... Radiology #Pulmonary #HRCT
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... centrilobular nodules ... Miliary TB: random ... nodules 3. ... Clinical #Radiology #HRCT
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis on HRCT ... imaging findings in interstitial ... disease comes from HRCT ... On HRCT there are ... patterns: reticular, nodular
Sarcoidosis
In this case the chest x-ray shows subtle findings that could be described as fine reticulation.
In
In many cases a HRCT ... The HRCT - not shown ... demonstrated a fine nodular ... #Sarcoidosis #Nodular ... #Interstitial #
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
BOOP • Type of interstitial ... malignancy and other interstitial ... irregular lines, nodular ... , cavities • HRCT ... CAP, Idiopathic interstitial
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Lymphangitic Carcinoma, Interstitial ... Low Attenuation Nodular ... : • Random: Metastases
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
interpretation of HRCT ... HR-pattern: reticular nodular ... perilymphatic or random ... Radiology #Pulmonary #HRCT
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
Thickening of the lung interstitium ... patients with interstitial ... usually seen in interstitial ... Nodular or irregular ... Radiology #Pulmonary #HRCT
Amiodarone Induced Lung Toxicity Summary

Who?
• 5% of patients
• Dose ≥ 400 mg per day

How?  Possible
multiple pulmonary nodules ... (e.g., chronic interstitial ... • Reticular + Nodular ... Most commonly: Interstitial ... confirmatory findings on HRCT