Feasibility of dynamic MRI for evaluating velopharyngeal insufficiency in children

Drissi, C.; Mitrofanoff, M.; Talandier, Chantal; Falip, C.; Couls, Vincent Le; Adamsbaum, C.

doi:10.1007/s00330-011-2069-7

Cited by 34 publications

(36 citation statements)

References 18 publications

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“…Cartesian TSE imaging with the ZOOM technique has been applied in the assessment of velopharyngeal closure [12,29,31] and has achieved up to 9 fps at 1.663.1 mm 2 in-plane resolution. We achieved 9 fps at 1.661.6 mm 2 in-plane resolution with consistently adequate or better image quality at 3 T and the highest quality images in 50% of cases at 1.5 T. The highest reported temporal resolution of 22 fps used in imaging the soft palate was achieved using a research only spiral imaging sequence [13,16].…”

Section: Discussionmentioning

confidence: 99%

“…An increasing number of research studies have used MRI to image the soft palate [10][11][12][13] and upper vocal tract [14][15][16][17]. In contrast to X-ray videofluoroscopy and nasendoscopy, MRI provides tomographic images in any plane with flexible tissue contrast.…”

mentioning

confidence: 99%

“…While such spin echo-based techniques are less susceptible to magnetic field inhomogeneity related signal dropout artefacts than other sequences, the frame rates achieved with these sequences are limited to 6 fps [31]. Gradient echo-based techniques have also been used to achieve similar temporal resolution [12,41,42] in the upper vocal tract, but are often used at much higher frame rates in other MRI applications such as cardiac imaging [43,44]. A number of gradient echo sequence variants exist.…”

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confidence: 99%

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Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Scott

Boubertakh²,

Birch³

et al. 2012

The British Journal of Radiology

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Objective: The objective of this study was to demonstrate soft palate MRI at 1.5 and 3 T with high temporal resolution on clinical scanners. Methods: Six volunteers were imaged while speaking, using both four real-time steady-state free-precession (SSFP) sequences at 3 T and four balanced SSFP (bSSFP) at 1.5 T. Temporal resolution was 9-20 frames s 21 (fps), spatial resolution 1.661.6610.0-2.762.7610.0 mm 3 . Simultaneous audio was recorded. Signal-to-noise ratio (SNR), palate thickness and image quality score (1-4, non-diagnostic-excellent) were evaluated. Results: SNR was higher at 3 T than 1.5 T in the relaxed palate (nasal breathing position) and reduced in the elevated palate at 3 T, but not 1.5 T. Image quality was not significantly different between field strengths or sequences (p5NS). At 3 T, 40% acquisitions scored 2 and 56% scored 3. Most 1.5 T acquisitions scored 1 (19%) or 4 (46%). Image quality was more dependent on subject or field than sequence. SNR in static images was highest with 1.961.9610.0 mm 3 resolution (10 fps) and measured palate thickness was similar (p5NS)

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Scott

Boubertakh²,

Birch³

et al. 2012

The British Journal of Radiology

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“…While isolated cleft lips are primarily an aesthetic problem, a cleft palate may impair the patient's speech, breathing or eating. 1 To detect anatomical deficits and functional impairments before secondary surgical intervention, imaging of velopharyngeal distance, closure, motor function and swallowing is mandatory. 2 Nasoendoscopy-the gold standard-to diagnose velopharyngeal insufficiency (VPI) explores the oropharynx cavity from the inside only.…”

Section: Introductionmentioning

confidence: 99%

“…It reveals little information about the thickness and role of the soft palate and velum for velopharyngeal closure to plan surgery. 1 Videofluoroscopy also permits "imaging while speaking." However, the radiation exposure limits its use, especially in children.…”

Section: Introductionmentioning

confidence: 99%

Dynamic 1.5-Tvs3-T true fast imaging with steady-state precession (trueFISP)-MRI sequences for assessment of velopharyngeal function

Sinko

Czerny

Jagsch

et al. 2015

Dentomaxillofacial Radiology

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Objectives: To compare the image quality of MRI scans produced with 1.5-and 3.0-T devices during functional test condition. Methods: 65 MRI scans obtained with 1.5-(n 5 43) or 3.0-T (n 5 22) true fast imaging with steady-state precession (trueFISP) sequences from patients with a history of a cleft palate were evaluated. Two experts assessed the MRI scans, independently of each other, and blinded to the MRI technique used. Subjective ratings were entered on a five-point Likert scale. The median planes of three anatomical structures (velum, tongue and pharyngeal wall) were assessed in three functional states (at rest, during phonation of sustained "e" and during articulation of "kkk"). In addition, MRI scans taken during velopharyngeal closure were evaluated. Results: Under blinded conditions, both observers (radiologist and orthodontist) independently rated the quality of 1.5-T scans higher than that of 3.0 T. Statistical analysis of pooled data showed that the differences were highly significant (p , 0.009) in 4 out of 10 test conditions. The greatest differences in favour of 1.5 T were observed for MRI scans of the velum. Conclusions: 1.5 T used with trueFISP may be preferable over 3.0-T trueFISP for the evaluation of the velopharyngeal structures in the clinical routine.

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Recommendations for real-time speech MRI

Lingala

Sutton

Miquel

et al. 2015

J. Magn. Reson. Imaging

127

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Real-time magnetic resonance imaging (RT-MRI) is being increasingly used for speech and vocal production research studies. Several imaging protocols have emerged based on advances in RT-MRI acquisition, reconstruction, and audio-processing methods. This review summarizes the state-of-the-art, discusses technical considerations, and provides specific guidance for new groups entering this field. We provide recommendations for performing RT-MRI of the upper airway. This is a consensus statement stemming from the ISMRM-endorsed Speech MRI summit held in Los Angeles, February 2014. A major unmet need identified at the summit was the need for consensus on protocols that can be easily adapted by researchers equipped with conventional MRI systems. To this end, we provide a discussion of tradeoffs in RT-MRI in terms of acquisition requirements, a priori assumptions, artifacts, computational load, and performance for different speech tasks. We provide four recommended protocols and identify appropriate acquisition and reconstruction tools. We list pointers to open-source software that facilitate implementation. We conclude by discussing current open challenges in the methodological aspects of RT-MRI of speech.

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Feasibility of dynamic MRI for evaluating velopharyngeal insufficiency in children

Abstract: Dynamic MRI is a non-invasive, rapid and repeatable method. It can be considered a complementary tool to endoscopy and fluoroscopy, particularly in children, for assessing VPI without any sedation or radiation exposure.

Cited by 34 publications

References 18 publications

Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Towards clinical assessment of velopharyngeal closure using MRI: evaluation of real-time MRI sequences at 1.5 and 3 T

Dynamic 1.5-Tvs3-T true fast imaging with steady-state precession (trueFISP)-MRI sequences for assessment of velopharyngeal function

Recommendations for real-time speech MRI

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