Functional evaluation of swallowing in patients with tongue cancer before and after surgery using high-speed continuous magnetic resonance imaging based on T2-weighted sequences

Nishimura, Shun; Tanaka, Tatsurou; Oda, Masafumi; Habu, Manabu; Kodama, Masaaki; Yoshiga, Daigo; Osawa, Kenji; Kokuryo, Shinya; Miyamoto, Ikuya; Kito, Shinji; Wakasugi-Sato, Nao; Matsumoto-Takeda, Shinobu; Joujima, Takaaki; Miyamura, Yuichi; Hitomi, Suzuro; Yamamoto, Noriaki; Uehara, Masataka; Sasaguri, Masaaki; Ono, Kentaro; Yoshioka, Izumi; Tominaga, Kazuhiro; Morimoto, Yasuhiro

doi:10.1016/j.oooo.2017.09.012

Cited by 4 publications

(3 citation statements)

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“…This normally results from the elevation of the larynx to the tongue and the anterior movement of the hyoid bone by contraction of the mouth floor and submental musculature. 28 It was remarkable that the no-motor group with a resected tongue base presented a significantly accelerated decrease in this value during the pharyngeal phase. We thought that this might be explained by the contraction of the mouth floor and the submental muscle as a compensatory mechanism for the impaired swallowing function of those in the nomotor group.…”

Section: Discussionmentioning

confidence: 96%

“…Regarding the tongue mobility index, the relative length of the mouth floor (RM/RC) showed a decreasing pattern, especially with an accelerated decrease from the oral preparatory to pharyngeal phase. This normally results from the elevation of the larynx to the tongue and the anterior movement of the hyoid bone by contraction of the mouth floor and submental musculature 28 . It was remarkable that the no‐motor group with a resected tongue base presented a significantly accelerated decrease in this value during the pharyngeal phase.…”

Section: Discussionmentioning

confidence: 99%

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Swallowing analysis in hemi‐tongue reconstruction using motor‐innervated free flaps: A cine‐magnetic resonance imaging study

et al. 2023

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Background This study aimed to explore the outcomes of motor‐innervated free flaps in hemi‐tongue reconstruction by assessing the tongue mobility through midsagittal images from cine‐magnetic resonance imaging. Methods In this retrospective study, 47 patients who underwent tongue reconstruction following hemi‐glossectomy and 10 control subjects without any surgical history were included. Patients were classified into two groups: the motor and no‐motor innervation group. Various spatial parameters related to tongue mobility that were acquired from midsagittal sections were compared during consecutive swallowing phases. Results Overall, the motor group showed improved functional swallowing scale compared with the no‐motor group. In case of tongue base resection, the motor group showed improved mobility of the tongue base during pharyngeal phase, whereas the no‐motor group showed increased laryngeal elevation for compensatory movement. Conclusion The tongue reconstruction with motor‐innervated free flaps may facilitate swallowing capacity in patients with a hemi‐tongue defect combined with tongue base resection.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Swallowing analysis in hemi‐tongue reconstruction using motor‐innervated free flaps: A cine‐magnetic resonance imaging study

et al. 2023

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“…Dynamic and real-time MRI (rtMRI) of the upper vocal tract can provide an insight into the disease and help treatment planning. It has, for example, been used to study speech particularly in patients with repaired cleft palate and velopharyngeal insufficiency (e.g., [23][24][25][26]), while swallow studies have been used to study normal deglutition (e.g., [27,28]), including breastfeeding swallow [29] and a variety of conditions, particularly tongue reconstruction post-cancer [30][31][32][33].…”

Section: Overview Of Dynamic and Rtmri: Sequences And Acquisition Strategiesmentioning

confidence: 99%

Realistic Dynamic Numerical Phantom for MRI of the Upper Vocal Tract

et al. 2020

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Dynamic and real-time MRI (rtMRI) of human speech is an active field of research, with interest from both the linguistics and clinical communities. At present, different research groups are investigating a range of rtMRI acquisition and reconstruction approaches to visualise the speech organs. Similar to other moving organs, it is difficult to create a physical phantom of the speech organs to optimise these approaches; therefore, the optimisation requires extensive scanner access and imaging of volunteers. As previously demonstrated in cardiac imaging, realistic numerical phantoms can be useful tools for optimising rtMRI approaches and reduce reliance on scanner access and imaging volunteers. However, currently, no such speech rtMRI phantom exists. In this work, a numerical phantom for optimising speech rtMRI approaches was developed and tested on different reconstruction schemes. The novel phantom comprised a dynamic image series and corresponding k-space data of a single mid-sagittal slice with a temporal resolution of 30 frames per second (fps). The phantom was developed based on images of a volunteer acquired at a frame rate of 10 fps. The creation of the numerical phantom involved the following steps: image acquisition, image enhancement, segmentation, mask optimisation, through-time and spatial interpolation and finally the derived k-space phantom. The phantom was used to: (1) test different k-space sampling schemes (Cartesian, radial and spiral); (2) create lower frame rate acquisitions by simulating segmented k-space acquisitions; (3) simulate parallel imaging reconstructions (SENSE and GRAPPA). This demonstrated how such a numerical phantom could be used to optimise images and test multiple sampling strategies without extensive scanner access.

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