{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T19:12:06Z","timestamp":1782241926981,"version":"3.54.5"},"reference-count":15,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2020,8,1]],"date-time":"2020-08-01T00:00:00Z","timestamp":1596240000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2020,8,1]],"date-time":"2020-08-01T00:00:00Z","timestamp":1596240000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2020,6,19]],"date-time":"2020-06-19T00:00:00Z","timestamp":1592524800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","ejradiology.com","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["European Journal of Radiology"],"published-print":{"date-parts":[[2020,8]]},"DOI":"10.1016\/j.ejrad.2020.109141","type":"journal-article","created":{"date-parts":[[2020,6,19]],"date-time":"2020-06-19T04:42:28Z","timestamp":1592541748000},"page":"109141","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":15,"special_numbering":"C","title":["Evaluation of intrathoracic tracheal narrowing in patients with obstructive ventilatory impairment using dynamic chest radiography: A preliminary study"],"prefix":"10.1016","volume":"129","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4273-8869","authenticated-orcid":false,"given":"Sayaka","family":"Watase","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akinaga","family":"Sonoda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Noritsugu","family":"Matsutani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shintarou","family":"Muraoka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Hanaoka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norihisa","family":"Nitta","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshiyuki","family":"Watanabe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"key":"10.1016\/j.ejrad.2020.109141_bib0005","doi-asserted-by":"crossref","first-page":"2101","DOI":"10.2147\/COPD.S140247","article-title":"Asynchrony in respiratory movements between the pulmonary lobes in patients with COPD: continuous measurement of lung density by 4-dimensional dynamic-ventilation CT","volume":"12","author":"Yamashiro","year":"2017","journal-title":"Int. J. Chron. Obstruct. Pulmon. Dis."},{"key":"10.1016\/j.ejrad.2020.109141_bib0010","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1118\/1.4937599","article-title":"Estimating lung ventilation directly from 4D CT Hounsfield unit values","volume":"43","author":"Kipritidis","year":"2016","journal-title":"Med. Phys."},{"key":"10.1016\/j.ejrad.2020.109141_bib0015","doi-asserted-by":"crossref","first-page":"417","DOI":"10.1097\/RLI.0000000000000457","article-title":"Pulmonary function diagnosis based on respiratory changes in lung density with dynamic flat-panel detector imaging: an animal-based study","volume":"53","author":"Tanaka","year":"2018","journal-title":"Invest. Radiol."},{"key":"10.1016\/j.ejrad.2020.109141_bib0020","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1007\/s12194-016-0361-6","article-title":"Dynamic chest radiography: flat-panel detector (FPD) based functional X-ray imaging","volume":"9","author":"Tanaka","year":"2016","journal-title":"Radiol. Phys. Technol."},{"key":"10.1016\/j.ejrad.2020.109141_bib0025","doi-asserted-by":"crossref","first-page":"527","DOI":"10.1016\/j.ccm.2013.05.003","article-title":"Tracheobronchomalacia and excessive dynamic airway collapse","volume":"34","author":"Murgu","year":"2013","journal-title":"Clin. Chest Med."},{"key":"10.1016\/j.ejrad.2020.109141_bib0030","doi-asserted-by":"crossref","first-page":"1669","DOI":"10.1007\/s00330-009-1306-9","article-title":"Airway malacia in chronic obstructive pulmonary disease: prevalence, morphology and relationship with emphysema, bronchiectasis and bronchial wall thickening","volume":"19","author":"Sverzellati","year":"2009","journal-title":"Eur. Radiol."},{"key":"10.1016\/j.ejrad.2020.109141_bib0035","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1016\/j.acra.2010.11.005","article-title":"Intrathoracic tracheal volume and collapsibility on inspiratory and end-expiratory CT scans correlations with lung volume and pulmonary function in 85 smokers","volume":"18","author":"Yamashiro","year":"2011","journal-title":"Acad. Radiol."},{"key":"10.1016\/j.ejrad.2020.109141_bib0040","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1148\/radiol.2521081958","article-title":"Tracheal collapsibility in healthy volunteers during forced expiration: assessment with multidetector CT","volume":"252","author":"Boiselle","year":"2009","journal-title":"Radiology"},{"key":"10.1016\/j.ejrad.2020.109141_bib0045","first-page":"74","article-title":"Airway dynamics during forced vital capacity maneuver with special reference to the study on dynamic bronchography and transmural pressure","volume":"10","author":"Orita","year":"1977","journal-title":"Bull. Chest Dis. Res. Inst. Kyoto Univ."},{"key":"10.1016\/j.ejrad.2020.109141_bib0050","doi-asserted-by":"crossref","first-page":"368","DOI":"10.1152\/physrev.1971.51.2.368","article-title":"Airway obstruction and collateral ventilation","volume":"51","author":"Macklem","year":"1971","journal-title":"Physiol. Rev."},{"key":"10.1016\/j.ejrad.2020.109141_bib0055","doi-asserted-by":"crossref","first-page":"843","DOI":"10.2147\/COPD.S80558","article-title":"Is intrathoracic tracheal collapsibility correlated to clinical phenotypes and sex in patients with COPD?","volume":"10","author":"Camiciottoli","year":"2015","journal-title":"Int. J. Chron. Obstruct. Pulmon. Dis."},{"key":"10.1016\/j.ejrad.2020.109141_bib0060","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.ejrad.2016.12.014","volume":"87","author":"Yamada","year":"2017","journal-title":"Eur. J. Radiol."},{"key":"10.1016\/j.ejrad.2020.109141_bib0065","doi-asserted-by":"crossref","first-page":"757","DOI":"10.2214\/AJR.17.17802","article-title":"Cine MRI of tracheal dynamics in healthy volunteers and patients with tracheobronchomalacia","volume":"209","author":"Ciet","year":"2017","journal-title":"AJR Am J Roentgenol."},{"key":"10.1016\/j.ejrad.2020.109141_bib0070","doi-asserted-by":"crossref","first-page":"294","DOI":"10.1159\/000357448","article-title":"Simultaneous assessment of airway instability and respiratory dynamics with low-dose 4D-CT in chronic obstructive pulmonary disease: a technical note","volume":"87","author":"Wielp\u00fctz","year":"2014","journal-title":"Respiration"},{"key":"10.1016\/j.ejrad.2020.109141_bib0075","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1148\/radiol.2352040309","article-title":"Tracheobronchomalacia: comparison between end-expiratory and dynamic expiratory CT for evaluation of central airway collapse","volume":"235","author":"Baroni","year":"2005","journal-title":"Radiology"}],"container-title":["European Journal of Radiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0720048X20303302?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0720048X20303302?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T07:21:05Z","timestamp":1759994465000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0720048X20303302"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,8]]},"references-count":15,"alternative-id":["S0720048X20303302"],"URL":"https:\/\/doi.org\/10.1016\/j.ejrad.2020.109141","relation":{},"ISSN":["0720-048X"],"issn-type":[{"value":"0720-048X","type":"print"}],"subject":[],"published":{"date-parts":[[2020,8]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Evaluation of intrathoracic tracheal narrowing in patients with obstructive ventilatory impairment using dynamic chest radiography: A preliminary study","name":"articletitle","label":"Article Title"},{"value":"European Journal of Radiology","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.ejrad.2020.109141","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2020 The Author(s). Published by Elsevier B.V.","name":"copyright","label":"Copyright"}],"article-number":"109141"}}