11 results
The distribution of nodules shown on HRCT is the most important factor in making an accurate
or random distribution ... peribronchovascular interstitium ... Centrilobular distribution ... #Pattern #Distribution ... #Random #Centrilobular
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
Algorithm for nodular ... pattern The algorithm ... and centrilobular ... bronchovascular interstitium ... Radiology #Pulmonary #HRCT
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Miliary TB: random ... perilymphatic distribution ... Clinical #Radiology #HRCT ... #Pattern #Comparison
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
pattern. 1. ... Miliary TB: random ... perilymphatic distribution ... perilymphatic distribution ... #Pattern #NodularPattern
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
Thickening of the interstitium ... resolution of the HRCT ... in ground glass pattern ... , NSIP, DIP. - Centrilobular ... distribution: Hypersensitivity
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 ... : reticular nodular ... secondary lobule (centrilobular ... perilymphatic or random ... Interpretation #Algorithm
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
High-Res Chest CT Patterns ... Lymphangitic Carcinoma, Interstitial ... Low Attenuation Nodular ... : • Random: Metastases ... Pneumoconiosis • Centrilobular
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
BOOP • Type of interstitial ... CXR: Peripheral distribution ... consolidation and GG pattern ... irregular lines, nodular ... , cavities • HRCT
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
with ground glass pattern ... in a mosaic distribution ... presents with centrilobular ... nodules of ground ... are confluent, HRCT
Lymphomas and Lymphoproliferative Disorders - Differential Diagnosis Algorithm
Hodgkin Lymphoma ~40% - Characteristic For Reed-Sternberg (RS) Cells
- Bimodal Age Distribution ... prognosis • Nodular ... • Classic - Nodular ... involvement, irregular pattern ... Lymphoproliferative #Disorders #Classification