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• W2035341745 abstract "Dysphagia following oropharyngeal cancer (OPC) treatment significantly contributes to morbidity and correlates with a decreased quality of life. The purpose of this study was to test the applicability of real-time (rt) MRI on the evaluation of swallowing of patients after OPC treatment. Six adult males after OPC treatment were recruited. Modified Barium Swallow (MBS) and two MRI sequences were used for swallow evaluation: single-slice (ss) rt-MRI and multi-slice (ms) rt-MRI. For the msrt-MRI slice-interleaving technique was used. Swallow task was 5 mL barium paste for MBS and 5 mL blueberry yogurt for MRI. Seven MRI slices of interest were prescribed and their geometries were saved: (1) Mid-sagittal, (2) axial on the vocal fold, (3) axial on the soft palate level, (4) axial on the base of the tongue (BOT), (5) axial on the middle of epiglottis, (6) coronal on the tongue body, and (7) coronal on the vocal fold. Six pairs of the mid-sagittal and slice #2-7 were imaged during the subject's swallows using the msrt-MRI pulse sequences. On MBS lateral view and midsagittal plane of ssrt-MRI, oral transit time (OTT), pharyngeal transit time (PTT), hyoid and laryngeal elevations were measured. Other immeasurable swallow events were evaluated on both MBS and MRI. Although each of the six patients has different OTTs and PTTs, the measured results of OTTs tended to be longer on MBS than on MRI (0.76 s vs 0.67 s, p = 0.32); the measured results of PTTs tended to be shorter on MBS than on MRI (0.62 s vs 0.71 s; p= 0.24). However, neither of the comparison showed statistical significance. Similarly, hyoid and laryngeal elevations were equivalent on MBS and MRI (1.53 cm vs 1.57 cm, p = 0.56; 0.87 cm vs 0.96 cm, p= 0.75). Besides similar swallow events observed on both MBS and ssrt-MRI, msrt-MRI had provided us the opportunity to disclose hidden pathology never reported previously. Extreme unilateral posterior pharyngeal wall movement was noticed to compensate ipsilateral BOT disfiguration due to transoral robotic surgery. Bilateral pharyngeal mobility was observed to assist “bolus squeezing” at the level of BOT due to incomplete contact of BOT and posterior pharyngeal wall. Vocal fold adduction was visualized and the duration was observed to be longer than the entire swallow sequence. MRI has its limitations on swallow evaluation, such as the cost and the need for swallowing to be evaluated in supine position. However, this study indicated that MRI has the potential to provide valuable information of swallow pathology that the current gold standard evaluation tool, MBS, cannot provide. The hidden pathologies that this study reported have the potential to influence OPC treatment planning and create novel rehabilitation maneuvers." @default.
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• W2035341745 date "2014-02-01" @default.
• W2035341745 modified "2023-09-27" @default.
• W2035341745 title "Swallow Function of Oropharyngeal Cancer Patients Using MRI" @default.
• W2035341745 doi "https://doi.org/10.1016/j.ijrobp.2013.11.123" @default.
• W2035341745 hasPublicationYear "2014" @default.
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