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

• Published in: PloS one Vol. 16; no. 3; p. e0248696
• Main Authors: Bae, Yun Jung, Kim, Tae Eun, Choi, Byung Se, Jeong, Woo-Jin, Cho, Se Jin, Baik, Sung Hyun, Sunwoo, Leonard, Kim, Jae Hyoung
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 18.03.2021; Public Library of Science (PLoS)
• Subjects: Algorithms; Biology and Life Sciences; Burning; Burning mouth syndrome; Cancer; Computed tomography; Computer programs; CT imaging; Cysts; Data analysis; Drafting software; Dysphagia; Editing; Engineering and Technology; Evaluation; Field of view; Head; Head & neck cancer; Head and neck; Image analysis; Image processing; Image quality; Inflammation; Lichen planus; Lipoma; Lymphadenopathy; Lymphoma; Magnetic resonance imaging; Medical imaging; Medicine and Health Sciences; Metastases; Methodology; Methods; Mouth; Neck; Odor; Odors; Oral cavity; Oral surgery; Oropharyngeal cancer; Oropharynx; Otolaryngology; Pharyngitis; Physiological aspects; Prostheses; Radiology; Reduction (metal working); Research and Analysis Methods; Salivary gland; Salivary glands; Skin diseases; Software; Squamous cell carcinoma; Surgery; Throat cancer; Tomography; Tongue; Visualization; South Korea
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0248696

To 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. Between 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. For 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 < 0.001). The mean visual scores were higher with CTo_O than with CTo for the mobile tongue and palatine tonsil (all, P < 0.001). Contrarily, for the mouth floor and tongue base, the mean noise was significantly higher with CTo_O than with CTc or CTc_O, and the mean visual scores were significantly higher with CTc than with CTo or CTo_O (all, P < 0.001). The 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.