ABSTRACT
IMPORTANCE: Magnetic resonance imaging (MRI) has the advantage of imaging swallow function at any anatomical level without changing the position of patient, which can provide detailed information than modified barium swallow, by far the gold standard of swallow evaluation. OBJECTIVE: To investigate the use of real-time MRI in the evaluation of swallow function of patients with tongue cancer. DESIGN, SETTING, AND PARTICIPANTS: Real-time MRI experiments were performed on a Signa Excite HD 1.5-T scanner (GE Healthcare), with gradients capable of 40-mT/m (milli-Tesla per meter) amplitudes and 150-mT/m/ms (mT/m per millisecond) slew rates. The sequence used was spiral fast gradient echo sequence. Four men with base of tongue or oral tongue squamous cell carcinoma and 3 age-matched healthy men with normal swallowing participated in the experiment. INTERVENTIONS: Real-time MRI of the midsagittal plane was collected during swallowing. Coronal planes between the oral tongue and base of tongue and through the middle of the larynx were collected from 1 of the patients. MAIN OUTCOMES AND MEASURES: Oral transit time, pharyngeal transit time, submental muscle length change, and the distance change between the hyoid bone and anterior boundary of the thyroid cartilage were measured frame by frame during swallowing. RESULTS: All the measurable oral transit and pharyngeal transit times of the patients with cancer were significantly longer than the ones of the healthy participants. The changes in submental muscle length and the distance between the hyoid bone and thyroid cartilage happened in concert for all 60 normal swallows; however, the pattern differed for each patient with cancer. To our knowledge, the coronal view of the tongue and larynx revealed information that has not been previously reported. CONCLUSIONS AND RELEVANCE: This study has demonstrated the potential of real-time MRI to reveal critical information beyond the capacity of traditional videofluoroscopy. Further investigation is needed to fully consider the technique, procedure, and standard scope of applying MRI to evaluate swallow function of patients with cancer in research and clinic practice.
Subject(s)
Carcinoma, Squamous Cell/diagnosis , Deglutition Disorders/diagnosis , Echo-Planar Imaging/methods , Image Interpretation, Computer-Assisted , Tongue Neoplasms/diagnosis , Aged , Carcinoma, Squamous Cell/radiotherapy , Carcinoma, Squamous Cell/surgery , Case-Control Studies , Deglutition/physiology , Deglutition Disorders/etiology , Follow-Up Studies , Humans , Male , Middle Aged , Pilot Projects , Postoperative Complications/diagnosis , Reference Values , Risk Assessment , Tongue Neoplasms/radiotherapy , Tongue Neoplasms/surgeryABSTRACT
Research on motor aging has focused on visuomotor effects in limb musculature, with few comparisons across effectors or feedback modalities. The authors examined steady fine force control in oral and manual effectors under visual and auditory feedback in 13 young (19-23 years old) and 13 older (60-77 years old) participants, hypothesizing that force variability would increase with aging (a) more in the finger than the lip and (b) for both feedback modalities. The magnitude of variability increased with age for both visuomotor and audiomotor tasks but age-related differences were greater in the lip than the finger. These results point to increased variability as a potential early marker of changing motor function (prior to loss of strength) that extends beyond the visuomotor system.
