Projected lung areas using dynamic X-ray (DXR).
%FEV1, percent predicted FEV1
%VC, percent vital capacity
BMI, body mass index
COPD, chronic obstructive pulmonary disease
Chest radiograph
DXR, dynamic X-ray
FEV1%, forced expiratory volume percent in one second divided by FVC
FEV1, forced expiratory volume in one second
FPD, flat-panel detector
FVC, forced vital capacity
Health screening cohort
IPF, idiopathic pulmonary fibrosis
PA, posteroanterior
PFTs, pulmonary function tests
PLA, projected lung area
Projected lung area
Pulmonary function
TLC, total lung capacity
TV, tidal volume
VC, vital capacity
dynamic X-ray
Journal
European journal of radiology open
ISSN: 2352-0477
Titre abrégé: Eur J Radiol Open
Pays: England
ID NLM: 101650225
Informations de publication
Date de publication:
2020
2020
Historique:
received:
16
07
2020
revised:
31
07
2020
accepted:
24
08
2020
entrez:
21
9
2020
pubmed:
22
9
2020
medline:
22
9
2020
Statut:
ppublish
Résumé
Dynamic X-ray (DXR) provides images of multiple phases of breath with less radiation exposure than CT. The exact images at end-inspiratory or end-expiratory phases can be chosen accurately. To investigate the correlation of the projected lung area (PLA) by dynamic chest X-ray with pulmonary functions. One hundred sixty-two healthy volunteers who received medical check-ups for health screening were included in this study. All subjects underwent DXR in both posteroanterior (PA) and lateral views and pulmonary function tests on the same day. All the volunteers took several tidal breaths before one forced breath as instructed. The outlines of lungs were contoured manually on the workstation with reference to the motion of diaphragm and the graph of pixel values. The PLAs were calculated automatically, and correlations with pulmonary functions and demographic data were analyzed statistically. The PLAs have correlation with physical characteristics, including height, weight and BMI, and pulmonary functions such as vital capacity (VC) and forced expiratory volume in one second (FEV PLA showed statistically significant correlation with pulmonary functions. Our results indicate DXR has a possibility to serve as an alternate method for pulmonary function tests in subjects requiring contact inhibition including patients with suspected or confirmed covid-19.
Sections du résumé
BACKGROUND
BACKGROUND
Dynamic X-ray (DXR) provides images of multiple phases of breath with less radiation exposure than CT. The exact images at end-inspiratory or end-expiratory phases can be chosen accurately.
PURPOSE
OBJECTIVE
To investigate the correlation of the projected lung area (PLA) by dynamic chest X-ray with pulmonary functions.
MATERIAL AND METHODS
METHODS
One hundred sixty-two healthy volunteers who received medical check-ups for health screening were included in this study. All subjects underwent DXR in both posteroanterior (PA) and lateral views and pulmonary function tests on the same day. All the volunteers took several tidal breaths before one forced breath as instructed. The outlines of lungs were contoured manually on the workstation with reference to the motion of diaphragm and the graph of pixel values. The PLAs were calculated automatically, and correlations with pulmonary functions and demographic data were analyzed statistically.
RESULTS
RESULTS
The PLAs have correlation with physical characteristics, including height, weight and BMI, and pulmonary functions such as vital capacity (VC) and forced expiratory volume in one second (FEV
CONCLUSION
CONCLUSIONS
PLA showed statistically significant correlation with pulmonary functions. Our results indicate DXR has a possibility to serve as an alternate method for pulmonary function tests in subjects requiring contact inhibition including patients with suspected or confirmed covid-19.
Identifiants
pubmed: 32953949
doi: 10.1016/j.ejro.2020.100263
pii: S2352-0477(20)30052-6
pmc: PMC7486627
doi:
Types de publication
Journal Article
Langues
eng
Pagination
100263Subventions
Organisme : NCI NIH HHS
ID : R01 CA203636
Pays : United States
Organisme : NCI NIH HHS
ID : U01 CA209414
Pays : United States
Informations de copyright
© 2020 The Authors.
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