Kinetic magnetic resonance imaging analysis of swallowing: a new approach to pharyngeal function

Foucart, Jean‐Michel; Carpentier, Pierre; Pajoni, D; Rabischong, P.; Pharaboz, C

doi:10.1007/bf01628116

Cited by 33 publications

(10 citation statements)

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“…The successful identification of the swallowing phases has been previously described in dynamic swallowing studies using the turbo‐FLASH image acquisition combined with an oral positive‐contrast agent by Foucart et al and Suto et al (5, 6). They obtained good spatial resolution of the involved oropharyngeal structures during contrast propulsion with a temporal resolution of 0.2 second/slice and 0.3 second/slice, respectively.…”

Section: Discussionmentioning

confidence: 79%

Evaluation of the anatomical and functional properties of deglutition with various kinetic high‐speed MRI sequences

Anagnostara

Stoeckli

Weber

et al. 2001

Magnetic Resonance Imaging

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We evaluated various fast MR sequences for obtaining anatomical and dynamic functional information during deglutition. Seven healthy volunteers underwent MRI of the oropharynx during swallowing of an oral positive-contrast agent. Single-slice imaging was performed in the median sagittal plane while subjects were in a supine position. Twenty serial images were obtained using EPI, FLASH, and turbo-FLASH sequences. The dynamic (movement-related) information and the anatomical resolution of the soft tissues were evaluated during deglutition. The FLASH sequence provided high-quality images at rest. During swallowing, however, the images were significantly degraded by movement artifacts and had inferior temporal resolution. The EPI evidenced better temporal resolution, but was degraded by strong distortions and movement arti- Index terms: fast MRI; dynamic MRI; swallowing; pharyngeal physiology; degluition DEGLUTITION IS THE COMPLEX COORDINATED AC-TIVITY of multiple voluntarily and involuntarily contracted muscles of the oropharynx, the larynx, and the upper digestive pathway. The motion of the involved anatomical structures while swallowing is very rapid: the mean duration of the oral and pharyngeal phases during bolus propulsion is approximately 1 second (1). The evaluation of the functional properties of the anatomical structures involved in swallowing has been severely impeded by the low temporal resolution of conventional, spin-echo, magnetic resonance imaging (MRI) sequences. Recent advances with ultra-fast MRI sequences now provide the opportunity to image softtissue motion with "near" real-time temporal resolution.Various high-speed MRI techniques, such as echoplanar imaging (EPI) and turbo-fast low-angle shot (turbo-FLASH), have been used to obtain dynamic images of soft tissues during physiological motion (2-4). The application of these sequences to the oropharynx and the upper digestive pathway to evaluate deglutition function has resulted in images with a satisfactory spatial and temporal resolution. The rapid swallowing motion can be adequately evaluated dynamically, with good recognition of the involved anatomical structures, in acquisition times below 1 second. Better delineation of the oropharyngeal apparatus can be achieved with the application of an oral positive-contrast agent as a food bolus substitute.The aim of the present study was to evaluate the ability of various available high-speed MRI sequences to dynamically image the deglutition process, and to determine which sequence provided the best dynamic (movement-related) information and anatomical resolution of the oropharyngeal soft tissues involved in each of the swallowing phases. The value of this technique as a diagnostic tool will be discussed in the context of the routinely used radiographic and endoscopic techniques. METHODSSeven healthy volunteers (five males and two females, age range: 25-35 years) with no history of oropharyngeal diseases participated in the study. A 1.5 T superconducting MRI system (Gyroscan ACS-NT, Philips Medical S...

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Section: Discussionmentioning

confidence: 79%

Evaluation of the anatomical and functional properties of deglutition with various kinetic high‐speed MRI sequences

Anagnostara

Stoeckli

Weber

et al. 2001

Magnetic Resonance Imaging

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“…Cine‐MRI, or kinetic MRI, produces a series of anatomic images with periodic motion. Recently, dynamic MRI techniques have been used to evaluate in different area of the body during physiological movements (6, 9, 19, 32, 33). Ultra‐fast MRI of deglutition is a new and promising dynamic diagnostic modality, which has the advantages of non‐invasiveness, absence of radiation exposure and capability of imaging soft‐tissue anatomy during motion in a multiplanar mode.…”

Section: Discussionmentioning

confidence: 99%

“…MRI technique gives a great number of data, not obtainable by any other instrumental examination at the same time (21). So, high‐speed kinetic MRI could be declared as a reliable and powerful tool for evaluating the anatomical and physiological characteristics of deglutition (19, 32, 33, 37) and that turbo‐FLASH acquisition currently provides the best anatomical and functional information for the evaluation of the swallowing act (19, 21). In addition to assessing the swallowing process, it can identify other soft‐tissue anomalies, such as enlarged adenoids, tumours in the maxillary sinuses and facial‐muscle movements.…”

Section: Discussionmentioning

confidence: 99%

“…The system was equipped with magnetic field gradients capable of a maximum strength of 33 mT m −1 and maximum slew rate of 160 T m −1 per seconds. To increase the signal intensity of the oropharynx and to observe the soft‐tissue motion during bolus propulsion (32), a water bolus was used in the current study. The EG subjects were instructed to take 10ml of water into their mouth by pushing through a syringe and hold the whole volume in front of their tongue until the swallow command of the MRI technician.…”

Section: Methodsmentioning

confidence: 99%

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Effect of complete denture wearing on deglutition time: a cine‐magnetic resonance imaging study

Gökçe

Akın

et al. 2011

J of Oral Rehabilitation

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Purpose of the study was to evaluate the effect of complete denture wearing on deglutition time (DT), hyoid bone and larynx movements in edentulous patients with real-time balanced turbo field echo cine-magnetic resonance imaging. Subjects were examined by cine-magnetic resonance imaging in supine position during swallowing water. Two sets of images for 23 edentulous (with/without wearing complete dentures) and one for 23 dentulous patients were obtained. Radiographic outputs representing three consecutive deglutition stages (oral, pharyngeal and oesophageal) were provided to perform measurements. Deglutition time significantly increased when edentulous patients wore their dentures (mean 0·75 s increased to 1·17 s), whereas dentulous patients' DT was about 0·91 s (P ≤ 0.05). The duration of deglutition is crucial because prolonged pharyngeal transit times increases the risk of aspiration. Within the limitations of the study, complete denture wearing could increase the shortened DT of the edentulous patients.

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“…The introduction of the Herbst appliance which utilizes anterior mandibular repositioning 1 ("bite-jumping") has been blamed for increasing the risk of developing TMD. 1,2 However, there are clinically insignificant structural bony changes to the TMJ detected after treatment with these appliances using traditional cephalometric analysis. 3,4 In the past, researchers were limited to cephalometric analysis on lateral and frontal headfilms.…”

Section: Introductionmentioning

confidence: 99%

A proposed method for evaluation of morphological changes in the condyle and glenoid fossa by cone beam computed tomography

Munn¹

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The difficulty with three-dimensional analyses remains with the myriad of data that is possible to derive from a volume. The goal of this study is to report 3D changes in the temporomandibular joint in a reliable and quantifiable way. The approach included plotting specific referents on the mandibular condyle and tracking them in magnitude (mm) and direction (°) on a reference plane after superimposing the cone beams threedimensionally on the inferior alveolar nerve canal and the lower contour of the third molar tooth germ. Two sets of measurements were compared for reliability and each measurement showed varied correlation. Linear measurements tended to be more reliable than component and angular measurements. Angular measurements were generally the least reliable. The varied reliability results are likely due to the difficulty in superimposing limited field of view (FOV) cone beam radiographs because of inadequate structures that are able to be superimposed.

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Kinetic magnetic resonance imaging analysis of swallowing: a new approach to pharyngeal function

Cited by 33 publications

References 1 publication

Evaluation of the anatomical and functional properties of deglutition with various kinetic high‐speed MRI sequences

Evaluation of the anatomical and functional properties of deglutition with various kinetic high‐speed MRI sequences

Effect of complete denture wearing on deglutition time: a cine‐magnetic resonance imaging study

A proposed method for evaluation of morphological changes in the condyle and glenoid fossa by cone beam computed tomography

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