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Craniofacial Center, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital and Chang Gung University, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, TaiwanCraniofacial Research Center, Chang Gung Memorial Hospital, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, TaiwanDepartment of Oral and Maxillofacial Surgery, Tokyo Women's Medical University School of Medicine, 8-1 Kawada-cho, Shinjyuku-ku, Tokyo, 167-8666, Japan
Craniofacial Center, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital and Chang Gung University, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, TaiwanDr. Edmund Chan's Clinic, Unit 602-3, Manning House, 48 Queen's Road Central, Central, Hong Kong
Craniofacial Center, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital and Chang Gung University, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, TaiwanCraniofacial Research Center, Chang Gung Memorial Hospital, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, Taiwan
Craniofacial Center, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital and Chang Gung University, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, TaiwanCraniofacial Research Center, Chang Gung Memorial Hospital, 5 Fu-Shin Street, Kwei Shan, Taoyuan 333, Taiwan
Computed tomography (CT) of the head and neck has become essential for craniofacial
evaluation, planning, and treatment of patients with dentofacial deformities. Its
usefulness is not limited to 3-dimensional cephalometry and computer-aided simulation
of operations, but is also crucial in the evaluation of the pharyngeal airway, particularly
in those with retrognathia and obstructive sleep apnoea. Observing the oropharyngeal
soft tissue structures, including the tongue, soft palate, and uvula, helps to better
understand the narrowed airway.
The similar density of the tongue and the soft tissues of the palate makes their
differentiation difficult without proper contrast, (Fig. 1) so we devised a simple technique to improve it on CT.
Fig. 1Plane computed tomogram (without contrast) of a 22-year-old woman with obstructive
sleep apnoea, (sagittal (A) and coronal (B) sections). The pharyngeal airway was narrowed,
with the oral cavity crowded by the soft palate and tongue.
☆This study was supported by Chang Gung Research Fund (CMRPG3A1361∼3). The authors thank Prof. Tomohiro Ando (Tokyo Women's Medical University) for giving the first author (R.S.) a great opportunity for study in Chang Gung Memorial Hospital.
