Dynamic-Ventilatory Digital Radiography in Air Flow Limitation: A Change in Lung Area Reflects Air Trapping.
Aged
Asthma
/ diagnostic imaging
Asthma-Chronic Obstructive Pulmonary Disease Overlap Syndrome
/ diagnostic imaging
Female
Forced Expiratory Volume
Functional Residual Capacity
Humans
Lung Neoplasms
/ diagnostic imaging
Male
Middle Aged
Pulmonary Disease, Chronic Obstructive
/ diagnostic imaging
Radiographic Image Enhancement
/ methods
Radiography, Thoracic
Vital Capacity
Air flow limitation
Chronic obstructive pulmonary disease
Digital radiography
Lung area changes
Pulmonary function
Journal
Respiration; international review of thoracic diseases
ISSN: 1423-0356
Titre abrégé: Respiration
Pays: Switzerland
ID NLM: 0137356
Informations de publication
Date de publication:
Historique:
received:
07
12
2019
accepted:
02
03
2020
pubmed:
30
4
2020
medline:
22
4
2021
entrez:
30
4
2020
Statut:
ppublish
Résumé
The aim of this study was to determine the utility of dynamic-ventilatory digital radiography (DR) for pulmonary function assessment in patients with airflow limitation. One hundred and eighteen patients with airflow limitation (72 patients with lung cancer before surgery, 35 patients with chronic obstructive pulmonary disease [COPD], 6 patients with asthma, and 5 patients with asthma-COPD overlap syndrome) were assessed with dynamic-ventilatory DR. The patients were instructed to inhale and exhale slowly and maximally. Sequential chest X-ray images were captured in 15 frames per second using a dynamic flat-panel imaging system. The relationship between the lung area and the rate of change in the lung area due to respiratory motion with respect to pulmonary function was analyzed. The rate of change in the lung area from maximum inspiration to maximum expiration (Rs ratio) was associated with the RV/TLC ratio (r = 0.48, p < 0.01) and the percentage of the predicted FEV1 (r = -0.33, p < 0.01) in patients with airflow limitations. The Rs ratio also decreased in an FEV1-dependent manner. The rate of change in the lung area due to respiratory motion evaluated with dynamic DR reflects air trapping. Dynamic DR is a potential tool for the comprehensive assessment of pulmonary function in patients with COPD.
Identifiants
pubmed: 32348982
pii: 000506881
doi: 10.1159/000506881
pmc: PMC7845443
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
382-388Informations de copyright
© 2020 S. Karger AG, Basel.
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