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[Qualitative assessment of centrilobular emphysema using computed tomography]
M Yamagishi1, H Koba, A Nakagawa
1Department of Internal Medicine (Section 3), Sapporo Medical College.
Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|March 25, 1991
Summary
Computed tomography (CT) effectively assesses centrilobular emphysema (CLE). High-resolution CT (HRCT) reveals emphysematous changes as low-attenuation areas, aiding in differentiating CLE from panlobular emphysema.
Area of Science:
- Pulmonary Medicine
- Radiology
- Pathology
Background:
- Centrilobular emphysema (CLE) is a common form of emphysema.
- Accurate qualitative assessment of CLE is crucial for patient management.
- Understanding the morphological relationship between emphysematous changes and bronchovascular bundles is key.
Purpose of the Study:
- To evaluate the ability of computed tomography (CT) in the qualitative assessment of centrilobular emphysema (CLE).
- To explore the morphological relationship between emphysematous changes and bronchovascular bundles in CLE.
- To correlate high-resolution CT (HRCT) findings with pathological features of CLE.
Main Methods:
- Study of three autopsied human lung lobes with varying degrees of CLE (mild, moderate, severe).
- Fixation of lobes using the Heitzman method.
- Application of high-resolution CT (HRCT) to inflation-fixed lobes for direct pathological correlation.
Main Results:
- Emphysematous changes in CLE appeared as low-attenuation areas (LAA) on CT images.
- LAA shape varied from round/oval in mild-moderate CLE to irregular in severe CLE.
- In severe CLE, LAA bordered bronchovascular bundles, unlike in milder cases where they were distant.
Conclusions:
- CT is a valuable tool for identifying the presence of centrilobular emphysema (CLE).
- HRCT findings correlate well with the pathological characteristics of CLE.
- CT analysis, particularly in severe emphysema, can help differentiate CLE from panlobular emphysema.