{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T09:47:21Z","timestamp":1753868841258,"version":"3.41.2"},"reference-count":11,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,5,8]],"date-time":"2024-05-08T00:00:00Z","timestamp":1715126400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["DEN Open"],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Accurate measurement of the size of lesions or distances between any two points during endoscopic examination of the gastrointestinal tract is difficult\u00a0owing\u00a0to the fisheye lens used in endoscopy. To overcome this issue, we developed a phase\u2010shift method to measure\u00a0three\u2010dimensional\u00a0(3D)\u00a0data on a curved surface, which we present herein. Our system\u00a0allows the creation of\u00a03D\u00a0shapes on a curved surface by the phase\u2010shift method using\u00a0a stripe pattern projected from a small projecting device to\u00a0an\u00a0object. For evaluation, 88 measurement points were inserted in porcine stomach tissue, attached to a half\u2010pipe jig, with an inner radius of 21 mm. The accuracy and precision of the measurement data for our shape measurement system were\u00a0compared\u00a0with\u00a0the\u00a0data obtained using\u00a0an Olympus STM6\u00a0measurement microscope. The accuracy of the path length of a simulated protruded lesion was evaluated using a plaster model of the curved stomach and graph paper. The difference in height measures between the measurement microscope\u00a0and measurement system data was 0.24 mm for the 88 measurement points on the curved surface of the porcine stomach. The error in the path length measurement for a lesion on an underlying curved surface was &lt;1% for a 10\u2010mm lesion. The software was developed for the automated calculation of the major and minor diameters of\u00a0each\u00a0lesion. The accuracy of our measurement system\u00a0could improve\u00a0the accuracy of determining the size of lesions, whether protruded or depressed,\u00a0regardless of the curvature of the underlying surface.<\/jats:p>","DOI":"10.1002\/deo2.381","type":"journal-article","created":{"date-parts":[[2024,5,9]],"date-time":"2024-05-09T05:44:53Z","timestamp":1715233493000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Exploratory investigation of virtual lesions in gastrointestinal endoscopy using a novel phase\u2010shift method for three\u2010dimensional shape measurement"],"prefix":"10.1002","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0239-4977","authenticated-orcid":false,"given":"Taku","family":"Sakamoto","sequence":"first","affiliation":[{"name":"Endoscopy Division National Cancer Center Hospital  Tokyo 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Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Satoru","family":"Nonaka","sequence":"additional","affiliation":[{"name":"Endoscopy Division National Cancer Center Hospital  Tokyo Japan"},{"name":"Division of Science and Technology for Endoscopy Exploratory Oncology Research and Clinical Trial Center National Cancer Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haruhisa","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Endoscopy Division National Cancer Center Hospital  Tokyo Japan"},{"name":"Division of Science and Technology for Endoscopy Exploratory Oncology Research and Clinical Trial Center National Cancer Center  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatsuya","family":"Nakamura","sequence":"additional","affiliation":[{"name":"Optical Engineering Olympus Medical Systems Corporation  Tokyo 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