{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T23:46:57Z","timestamp":1777506417680,"version":"3.51.4"},"reference-count":18,"publisher":"SAGE Publications","issue":"12","license":[{"start":{"date-parts":[[2020,3,25]],"date-time":"2020-03-25T00:00:00Z","timestamp":1585094400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Acta Radiol"],"published-print":{"date-parts":[[2020,12]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>It is still unclear which image reconstruction algorithm is appropriate for peripheral bronchial luminal conspicuity (PBLC) on dynamic-ventilation computed tomography (DVCT).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To assess the influence of radiation doses and temporal resolution (TR) on the association between movement velocity (MV) and PBLC on DVCT.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and Methods<\/jats:title>\n                    <jats:p>\n                      An ex vivo porcine lung phantom with simulated respiratory movement was scanned by 320-row CT at 240\u2009mA and 10\u2009mA. Peak and dip CT density and luminal area adjusted by values at end-inspiration (CTD\n                      <jats:sub>peak<\/jats:sub>\n                      and CTD\n                      <jats:sub>dip<\/jats:sub>\n                      , luminal area ratio [LAR]) for PBLC and MVs were measured and visual scores (VS) were obtained at 12 measurement points on 13 frame images obtained at half and full reconstructions (TR 340 and 190 ms) during expiration. Size-specific dose estimate (SSDE) was applied to presume radiation dose. VS, CTD\n                      <jats:sub>peak<\/jats:sub>\n                      , CTD\n                      <jats:sub>dip<\/jats:sub>\n                      , LAR, and their cross-correlation coefficients with MV (CCC) were compared among four methods with combinations of two reconstruction algorithms and two doses.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The dose at 10\u2009mA was presumed as 26\u2009mA by SSDE for standard proportion adults. VS, CTD\n                      <jats:sub>dip<\/jats:sub>\n                      , CTD\n                      <jats:sub>peak<\/jats:sub>\n                      , and LAR with half reconstruction at 10\u2009mA (2.52\u2009\u00b1\u20090.59, 1.016\u2009\u00b1\u20090.221, 0.948\u2009\u00b1\u20090.103, and 0.990\u2009\u00b1\u20090.527) were similar to those at 240\u2009mA except for VS, and different from those with full reconstruction at both doses (2.24\u2009\u00b1\u20090.85, 0.830\u2009\u00b1\u20090.209, 0.986\u2009\u00b1\u20090.065, and 1.012\u2009\u00b1\u20090.438 at 240\u2009mA) ( P\u2009&lt;\u20090.05). CCC for CTD\n                      <jats:sub>dip<\/jats:sub>\n                      with half reconstruction (\u20130.024\u2009\u00b1\u20090.552) at 10\u2009mA was higher compared with full reconstruction (\u20130.503\u2009\u00b1\u20090.291) ( P\u2009&lt;\u20090.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>PBLC with half reconstruction at 10\u2009mA was comparable to that at 240\u2009mA and better than those with full reconstruction on DVCT.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0284185120911186","type":"journal-article","created":{"date-parts":[[2020,3,25]],"date-time":"2020-03-25T23:37:27Z","timestamp":1585179447000},"page":"1608-1617","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Peripheral bronchial luminal conspicuity on dynamic-ventilation computed tomography: association with radiation doses and temporal resolution by using an ex vivo porcine lung phantom"],"prefix":"10.1177","volume":"61","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1110-963X","authenticated-orcid":false,"given":"Yukihiro","family":"Nagatani","sequence":"first","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Makoto","family":"Yoshigoe","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shinsuke","family":"Tsukagoshi","sequence":"additional","affiliation":[{"name":"CT System Division, Canon Medical Systems, Otawara, Tochigi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noritoshi","family":"Ushio","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kohei","family":"Ohashi","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Norihisa","family":"Nitta","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatsuya","family":"Kimoto","sequence":"additional","affiliation":[{"name":"Center for Medical Research and Development, Canon Medical Systems, Otawara, Tochigi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ayumi","family":"Uranishi","sequence":"additional","affiliation":[{"name":"CT System Division, Canon Medical Systems, Otawara, Tochigi, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6460-0142","authenticated-orcid":false,"given":"Shigetaka","family":"Sato","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masayuki","family":"Mayumi","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1904-2548","authenticated-orcid":false,"given":"Tsuneo","family":"Yamashiro","sequence":"additional","affiliation":[{"name":"Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Moriya","sequence":"additional","affiliation":[{"name":"Department of Radiology, Ohara General Hospital, Fukushima, Fukushima, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kiyoshi","family":"Murata","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshiyuki","family":"Watanabe","sequence":"additional","affiliation":[{"name":"Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"name":"for the investigators of ACTIve study 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