3 Tesla turbo‐FLASH magnetic resonance imaging of deglutition

Amin, Milan R.; Lazarus, Cathy L.; Pai, Vinay; Mulholland, Thomas; Shepard, Timothy F.; Branski, Ryan C.; Wang, Edwin Y.

doi:10.1002/lary.22496

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…Utilizing this technology, we were able to produce excellent image quality with a temporal resolution of 113 ms, with good visualization of the tongue base and pharyngeal constrictors during swallowing in axial planes. 19 In the current study, we expand on our previous work by demonstrating the inherent feasibility and reliability of the technique to characterize pharyngeal and UES movements in normal, healthy adults. Our data demonstrate that spatial and temporal measurements of pharyngeal wall movement can be reliably performed and show a definable pattern at both the C2 and UES levels.…”

Section: Discussionmentioning

confidence: 80%

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Dynamic Magnetic Resonance Imaging of the Pharynx during Deglutition

Amin¹,

Achlatis²,

Lazarus³

et al. 2013

Ann Otol Rhinol Laryngol

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Objectives To utilize dynamic magnetic resonance imaging (dMRI) to visualize the pharynx and upper esophageal segment in normal, healthy controls. Methods A 3-T scanner with a 4-channel head coil and a dual-channel neck coil was employed to obtain hsMRI images of subjects swallowing liquids and pudding. Thirty sequential images were acquired over 3300ms for each swallow. Imaging was performed in the midsagittal and axial plane at the level of the oropharynx and pharyngoesophageal segment. Axial images were then analyzed for variables related to alterations in pharyngeal and UES area during swallowing as well as temporal measures related to these structures. Results All subjects tolerated the study protocol without complaint. Changes in pharyngeal wall luminal area and temporal measurements were consistent within and between subjects. Inter- and intra-rater reliability for the measurement tool was excellent. Conclusions dMRI of the swallow sequence is both feasible and reliable and may eventually compliment currently-used diagnostic modalities as it adds substantive information.

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Section: Discussionmentioning

confidence: 80%

“…Utilizing this technology, we were able to produce excellent image quality with a temporal resolution of 110ms, with good visualization of the tongue base and pharyngeal constrictors during swallowing in the axial and sagittal planes. (19)…”

Section: Discussionmentioning

confidence: 99%

Dynamic Magnetic Resonance Imaging of the Pharynx during Deglutition

Amin¹,

Achlatis²,

Lazarus³

et al. 2013

Ann Otol Rhinol Laryngol

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show abstract

“…Our group previously described dynamic magnetic resonance imaging (dMRI) as a technique that allows examination of the swallow sequence with improved visualization of these structures in the axial plane during normal swallow in healthy patients. 11,12 Further study demonstrated good intraexaminer and interexaminer reliability for measurements of the pharyngeal area. 13 Although a limitation of dMRI includes supine positioning and a theoretically increased risk of aspiration, studies have shown that bolus transport to the UES and timing of muscle activation are not changed by the supine position.…”

Section: Introductionmentioning

confidence: 81%

Magnetic Resonance Imaging of the Effortful Swallow

Fritz

Cerrati

Fang

et al. 2014

Ann Otol Rhinol Laryngol

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“…The study could not differentiate patient subgroups with PD stages (H&Y 1, 1.5, 2 and 2.5) or patients with and without dysphagia risk-signs. Dynamic MRI constraints in swallowing assessment are: (a) supine position in some cases, it may be awkward or unnatural position for water-intake (b) it may not fully represent actual situation, though it has been reported as noninterfering with assessment 28,53,54 ; (c) may not be feasible in medically unstable, disoriented, or uncooperative patients like VFS and FEES; (d) objectifying the overlapping phases of swallowing; (e) patients with MRI contraindications cannot be evaluated.…”

Section: Discussionmentioning

confidence: 99%

Subtle oromotor signs in early Parkinson’s disease before clinical manifestations of dysphagia

Gudwani

Upadhyay

Sharma

et al. 2021

Preprint

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Background: Swallowing is complex phenomena comprising oral (preparatory and pre-swallow positioning), oropharyngeal, pharyngeal and esophageal phases. The timing of these phases is controlled by brain stem pattern generators including reflex for oropharyngeal propulsion and transit. Dysphagia in Parkinson's disease (PD) commonly observed at late stages with aspiration, pneumonia and hospitalization. Objective: Can subtle oromotor signs (if any) be observed for planning early interventions in PD Methods: The present study investigated oromotor function in fourteen early PD (onset ≤2years; H&Y ≤2.5) with dynamic MRI using saline (water) bolus and compared with seven age-matched healthy controls. Results: All the patients with PD were non-symptomatic for dysphagia by self-reporting, and on clinical assessment (Part-II MDS-UPDRS, Swallowing disturbance questionnaire, SDQ and Clinical assessment of dysphagia in neurodegeneration, CADN). Qualitatively MR images visualized, differences in PD compared to healthy controls for tongue-wave, velar-closure or release, bolus placement, oropharyngeal reflex-initiation, transit-time, epiglottic-closure-coordination and post-swallow oral or pharyngeal residue. Descriptive analysis showed higher variability of velar-closure, oropharyngeal- and pharygoesophageal-transit time in patient with PD. Group analysis (two-sample) show significant difference for velar-closure. Conclusion: Multiple lingual-waves, reverse-tongue thrust, with delayed velar control attributed to incoordinated muscular rhythm. Variable oropharyngeal transit time (0.64 to 2.25 msec) in PD ascribed to brainstem degenerative changes. Findings imply that subtle observable early oromotor signs as pre-clinical manifestation when evaluated with non-invasive, non-contrast dynamic MRI support early intervention, to prevent late-stage aspiration episodes and consequent hospitalizations.

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3 Tesla turbo‐FLASH magnetic resonance imaging of deglutition

Abstract: MRI of swallowing using the described technique is reliable and provides a unique evaluation of the swallowing sequence.

Cited by 11 publications

References 27 publications

Dynamic Magnetic Resonance Imaging of the Pharynx during Deglutition

Dynamic Magnetic Resonance Imaging of the Pharynx during Deglutition

Magnetic Resonance Imaging of the Effortful Swallow

Subtle oromotor signs in early Parkinson’s disease before clinical manifestations of dysphagia

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