PLoS ONE (Jan 2021)

Comprehensive assessments of the open mouth dynamic maneuver and metal artifact reduction algorithm on computed tomography images of the oral cavity and oropharynx.

  • Yun Jung Bae,
  • Tae Eun Kim,
  • Byung Se Choi,
  • Woo-Jin Jeong,
  • Se Jin Cho,
  • Sung Hyun Baik,
  • Leonard Sunwoo,
  • Jae Hyoung Kim

DOI
https://doi.org/10.1371/journal.pone.0248696
Journal volume & issue
Vol. 16, no. 3
p. e0248696

Abstract

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ObjectivesTo determine the optimal utility of the open mouth maneuver and Metal Artifact Reduction for the Orthopedic Implants (O-MAR) technique for CT of the oral cavity and oropharynx.MethodsBetween July 2017 and May 2019, 59 subjects who underwent both conventional and open mouth head and neck CT scans were included in this retrospective study. All images were reconstructed using the O-MAR algorithm. With conventional CT with/without the O-MAR (CTc_O/CTc) and open mouth CT with/without O-MAR (CTo_O/CTo), one reader measured the noise level in multiple anatomic regions of the oral cavity and oropharynx. Visual scores for the streak artifact and overall subjective image quality were assessed by two independent readers.ResultsFor the mobile tongue, retromolar trigone, and palatine tonsil, the mean noise was significantly lower, and the mean visual scores were significantly higher, with CTo than with CTc or CTc_O (all, P ConclusionsThe open mouth maneuver and O-MAR technique can have different influences on the CT image quality according to the anatomical subsites of the oral cavity and oropharynx.