Cine-MRT des Kiefergelenks im Vergleich zur konventionellen MRT und Achsiographie

Beer, Ambros J.; Kolk, Anja G. van der; Neff, Andreas; Hof, N.; Treumann, Thomas; Ej, Rummeny

doi:10.1055/s-2004-813039

Cited by 11 publications

References 5 publications

(7 reference statements)

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Dynamic near‐real‐time magnetic resonance imaging for analyzing the velopharyngeal closure in comparison with videofluoroscopy

Beer

Hellerhoff

Zimmermann

et al. 2004

Magnetic Resonance Imaging

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Purpose:To demonstrate the feasibility of dynamic magnetic resonance imaging (MRI) with near-real-time temporal resolution ("real-time MRI") for analyzing the velopharyngeal closure in comparison with multiview videofluoroscopy. Materials and Methods:Seven patients (three females and four males, 5-21 years old, mean age ϭ 11.3 years) with suspected velopharyngeal insufficiency, and one healthy volunteer were examined with videofluoroscopy and real-time MRI using a turbo-spin-echo (TSE) sequence (TR ϭ 170 msec, TE ϭ 21 msec, slice thickness ϭ 6 mm, six images per second). Imaging was done during phonation in all three image planes. The results were analyzed by two radiologists in comparison with videofluoroscopy as the standard of reference for overall image quality and the pattern of velopharyngeal closure.Results: Real-time MRI correctly depicted the pattern of velopharyngeal closure in correspondence to videofluoroscopy in all cases. Concerning the movement of the pharyngeal walls, real-time MRI falsely depicted a general movement of the dorsal pharyngeal wall in one case, whereas videofluoroscopy showed no movement. In one patient, real-time MRI provided additional information by showing an asymmetric movement of the lateral pharyngeal walls that could not be depicted by videofluoroscopy due to technical limitations. Concerning image quality, the coronal plane was more difficult to evaluate with real-time MRI compared to videofluoroscopy. The axial plane was easier to analyze in real-time MRI compared to videofluoroscopy. Conclusion:Real-time MRI has the potential to depict the pattern of velopharyngeal closure in close correlation with videofluoroscopy, and may deliver additional information in selected cases.

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Dynamic near‐real‐time magnetic resonance imaging for analyzing the velopharyngeal closure in comparison with videofluoroscopy

Beer

Hellerhoff

Zimmermann

et al. 2004

Magnetic Resonance Imaging

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Temporomandibular Joint Imaging in Health and Disease

Jaju¹,

Jaju²,

Pushkarna³

et al. 2021

Temporomandibular Joint Disorders

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Visualization of the articular disk of the temporomandibular joint in near-real-time MRI: feasibility study

et al. 2004

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While static MRI of the TMJ is the method of choice to evaluate the articular disk (AD), dynamic MRI so far has failed to display the AD. The capability of a modified True-FISP sequence to visualize the AD in dynamic near-real-time imaging (NRTI) was evaluated. Twelve healthy subjects and 17 patients were investigated. Besides static routine imaging, sagittal NRTI of both TMJs was performed with a True-FISP sequence at 1.5 T with TE/TR=1.84/3.68 ms. Two temporal resolutions (250/500 ms) were tested. The quality of the visualization of the AD was rated on a four-point scale (1= very good to 4= poor visualization) by two observers in consensus. ADs of the volunteers were visualized with high quality in all stages of movement (score: 1.69). In patients with internal derangement, disk-motion was clearly depicted, including fast reposition movements. Due to degenerative changes of the AD, the quality of the depiction in patients was slightly lower (score: 2.4). According to the preliminary results of this feasibility study, the suggested NRTI True-FISP sequence is capable of visualizing the entire motion of the AD of the TMJ in normal and pathologic stages with high quality. Further studies are needed to prove the clinical usefulness of this new technique.

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Cine-MRT des Kiefergelenks im Vergleich zur konventionellen MRT und Achsiographie

Abstract: Real-time MRI of the TMJ is comparable to axiography in its accuracy and is a useful adjunct to conventional static MRI.

Cited by 11 publications

References 5 publications

Dynamic near‐real‐time magnetic resonance imaging for analyzing the velopharyngeal closure in comparison with videofluoroscopy

Dynamic near‐real‐time magnetic resonance imaging for analyzing the velopharyngeal closure in comparison with videofluoroscopy

Temporomandibular Joint Imaging in Health and Disease

Visualization of the articular disk of the temporomandibular joint in near-real-time MRI: feasibility study

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