{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T19:49:50Z","timestamp":1789760990300,"version":"4.0.1"},"reference-count":42,"publisher":"Oxford University Press (OUP)","issue":"8","license":[{"start":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T00:00:00Z","timestamp":1698105600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,11,1]]},"abstract":"<jats:sec>\n                  <jats:title>Objectives:<\/jats:title>\n                  <jats:p>Different factors can affect the discrepancy between the gray value (GV) measurements obtained from CBCT and the Hounsfield unit (HU) derived from multidetector CT (MDCT), which is considered the gold-standard density scale. This study aimed to explore the impact of region of interest (ROI) location and field of view (FOV) size on the difference between these two scales as a potential source of error.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Three phantoms, each consisting of a water-filled plastic bin containing a dry dentate human skull, were prepared. CBCT scans were conducted using the NewTom VGi evo system, while MDCT scans were performed using Philips system. Three different FOV sizes (8 \u00d7 8\u2009cm, 8 \u00d7 12\u2009cm, and 12 \u00d7 15\u2009cm) were used, and the GVs obtained from eight distinct ROIs were compared with the HUs from the MDCT scans. The ROIs included dental and bony regions within the anterior and posterior areas of both jaws. Statistical analyses were performed using SPSS v. 26.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>The GVs derived from CBCT images were significantly influenced by both ROI location and FOV size (p &amp;lt; 0.05 for both factors). Following the comparison between GVs and HUs, the anterior mandibular bone ROI represented the minimum error, while the posterior mandibular teeth exhibited the maximum error. Moreover, the 8 \u00d7 8\u2009cm and 12 \u00d7 15\u2009cm FOVs resulted in the lowest and highest degrees of GV error, respectively.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>The ROI location and the FOV size can significantly affect the GVs obtained from CBCT images. It is not recommended to use the GV scale within the posterior mandibular teeth region due to the potential for error. Additionally, selecting smaller FOV sizes, such as 8 \u00d7 8\u2009cm, can provide GVs closer to the gold-standard numbers.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1259\/dmfr.20230187","type":"journal-article","created":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T12:34:45Z","timestamp":1698150885000},"source":"Crossref","is-referenced-by-count":28,"title":["Assessment of CBCT gray value in different regions-of-interest and fields-of-view compared to Hounsfield unit"],"prefix":"10.1093","volume":"52","author":[{"given":"Atiye","family":"Yadegari","sequence":"first","affiliation":[{"name":"Department of Pediatric Dentistry, School of Dentistry, Hamadan University of Medical Sciences , Hamadan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaser","family":"Safi","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillofacial Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences , Tehran, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soheil","family":"Shahbazi","sequence":"additional","affiliation":[{"name":"Dental Research Center, Shahid Beheshti University of Medical Sciences , Tehran, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sahar","family":"Yaghoutiazar","sequence":"additional","affiliation":[{"name":"Department of Pediatric Dentistry, School of Dentistry, Hamadan University of Medical Sciences , Hamadan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mitra","family":"Ghazizadeh Ahsaie","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillofacial Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences , Tehran, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2023,10,24]]},"reference":[{"key":"2024011814550779500_b1","first-page":"390","article-title":"Applications of CBCT in dental 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