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Published in: European Radiology 1/2015

01-01-2015 | Chest

Assessment of the relationship between morphological emphysema phenotype and corresponding pulmonary perfusion pattern on a segmental level

Authors: Mark Bryant, Sebastian Ley, Ralf Eberhardt, Ravi Menezes, Felix Herth, Oliver Sedlaczek, Hans-Ulrich Kauczor, Julia Ley-Zaporozhan

Published in: European Radiology | Issue 1/2015

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Abstract

Purpose

Distinct morphological emphysema phenotypes were assessed by CT to show characteristic perfusion defect patterns.

Material/Methods

Forty-one patients with severe emphysema (GOLD III/IV) underwent three-dimensional high resolution computed tomography (3D-HRCT) and contrast-enhanced magnetic resonance (MR) perfusion. 3D-HRCT data was visually analyzed for emphysema phenotyping and quantification by consensus of three experts in chest-radiology. The predominant phenotype per segment was categorized as normal, centrilobular, panlobular or paraseptal. Segmental lung perfusion was visually analyzed using six patterns of pulmonary perfusion (1-normal; 2-mild homogeneous reduction in perfusion; 3-heterogeneous perfusion without focal defects; 4-heterogeneous perfusion with focal defects; 5-heterogeneous absence of perfusion; 6-homogeneous absence of perfusion), with the extent of the defect given as a percentage.

Results

730 segments were evaluated. CT categorized 566 (78 %) as centrilobular, 159 (22 %) as panlobular and 5 (<1 %) as paraseptal with no normals. Scores with regards to MR perfusion patterns were: 1–0; 2–0; 3–28 (4 %); 4–425 (58 %); 5–169 (23 %); 6–108 (15 %).
The predominant perfusion pattern matched as follows: 70 % centrilobular emphysema - heterogeneous perfusion with focal defects (score 4); 42 % panlobular - homogeneous absence of perfusion (score 5); and 43 % panlobular - heterogeneous absence of perfusion (score 6).

Conclusion

MR pulmonary perfusion patterns correlate with the CT phenotype at a segmental level in patients with severe emphysema.

Key points

MR perfusion patterns correlate with the CT phenotype in emphysema.
Reduction of MR perfusion is associated with loss of lung parenchyma on CT
Centrilobular emphysema shows heterogeneous perfusion reduction while panlobular emphysema shows loss of perfusion.
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Metadata
Title
Assessment of the relationship between morphological emphysema phenotype and corresponding pulmonary perfusion pattern on a segmental level
Authors
Mark Bryant
Sebastian Ley
Ralf Eberhardt
Ravi Menezes
Felix Herth
Oliver Sedlaczek
Hans-Ulrich Kauczor
Julia Ley-Zaporozhan
Publication date
01-01-2015
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 1/2015
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-014-3385-5

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