Multi-slice real-time MRI of temporomandibular joint dynamics

Krohn, Sebastian; Joseph, Arun A.; Voit, Dirk; Michaelis, Thomas; Merboldt, Klaus‐Dietmar; Buergers, Ralf; Frahm, Jens

doi:10.1259/dmfr.20180162

Cited by 23 publications

(22 citation statements)

References 29 publications

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“…The accuracy of this strategy has been experimentally confirmed (18). For similar reasons, simultaneous dual-slice acquisitions (15) were realized in a frame-interleaved manner which keeps the temporal footprint short (i.e., here at 20 ms), whereas alternative spoke-interleaved acquisitions double the repetition interval and therefore also the measuring time. The chosen strategy further benefits from an improved signal-to-noise ratio due to the interleaved periods of free T1 relaxation.…”

Section: Dual-slice Real-time Mrimentioning

confidence: 82%

Simultaneous dual-plane, real-time magnetic resonance imaging of oral cavity movements in advanced trombone players

Iltis¹,

Heyne²,

Frahm³

et al. 2019

Quant. Imaging Med. Surg

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Background: This paper describes the use of real-time magnetic resonance imaging to simultaneously obtain magnetic resonance imaging (MRI) videos in both a sagittal and coronal plane during the performance of a musical exercise in five advanced trombone players. Methods: Dual-slice recordings were implemented in a frame-interleaved manner with 20 ms acquisitions per frame to achieve two interleaved videos at a rate of 25 frames per second. A customized MATLAB toolkit was used for the extraction of line profiles from MRI videos to quantify tongue movements associated with exercise performance from both perspectives. Results: Across all subjects, the analyses revealed precise coupling of vertical movements of the dorsal tongue surface (DTS), viewed from a sagittal perspective, with reduction in the vertical and horizontal dimensions of the air channel formed between the DTS and the hard palate, viewed from a coronal perspective. The cross-correlation between these movements was very strong (mean R=0.967). Conclusions: These results demonstrate the unique utility of this dual-slice technology in describing the coordination of complex tongue movements occurring in two planes (i.e., three directions) simultaneously, lending a deeper understanding of lingual motor control during trombone performance.

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Section: Dual-slice Real-time Mrimentioning

confidence: 82%

Simultaneous dual-plane, real-time magnetic resonance imaging of oral cavity movements in advanced trombone players

Iltis¹,

Heyne²,

Frahm³

et al. 2019

Quant. Imaging Med. Surg

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show abstract

“…In our experience, the approach of employing a parent for gentle immobilization of the child's head on the MRI table in cases of strong movement has proved to be safe and effective. Bearing in mind all well-known safety precautions, such as preventing contact with the radiofrequency receiver coil and avoiding closed loops and skin-to-skin contact [11], no adverse effects were observed in either the parents or the children.…”

Section: Discussionmentioning

confidence: 99%

Outpacing movement — ultrafast volume coverage in neuropediatric magnetic resonance imaging

Gräfe¹,

Roth²,

Weißer

et al. 2020

Pediatr Radiol

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Background Conventional MRI sequences are often affected in neuropediatric imaging by unavoidable movements. Therefore, children younger than 6 years usually have to be examined under sedation/anesthesia. A new real-time MRI technique with automatic slice advancement allows for motion-robust T2-weighted volume coverage of the whole brain within a few seconds in adults. Objective To evaluate to which extent the new volume coverage method can be used to visualize cerebrospinal fluid and reduce the need for anesthesia in children. Materials and methods We assessed 30 children ages 6 years and younger with suspected or proven hydrocephalus, hygroma or macrocephalus using volume coverage sequences with 20 slices per second in three planes. If necessary, a parent was placed in the bore together with the child for calming and gentle immobilization. We compared visualization of cerebrospinal fluid spaces and course of the shunt catheter in volume coverage sequences vs. fast spin-echo sequences. Results The clinical issue could be sufficiently assessed in all children with use of volume coverage sequences, whereas conventional fast spin-echo sequences performed moderately to poorly. Visualization of the tip of a shunt failed in 16% of volume coverage scans and 27% of turbo spin-echo scans. A subsequent examination under anesthesia was never necessary. None of the examinations had to be stopped prematurely. Conclusion The motion-robust volume coverage sequences with T2-type contrast can be used to avoid sedation of children in the evaluation of cerebrospinal fluid spaces, even in the presence of vigorous motion. For other indications and contrasts, the technique must still be evaluated.

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“…Obviously, magnetic resonance imaging will be important for information about the different characteristics of the soft and hard tissues of the TMJ [11] . We believe that other radiological investigations that are more accessible, less expensive and less difficult to interpret than magnetic resonance imaging should be considered.…”

Section: Biology and Diagnosismentioning

confidence: 99%

Future of minimally invasive surgery in temporomandibular joint pathology

Monje¹

2020

SDS

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Minimally invasive surgery (MIS) has experienced a surge in popularity over the past few decades. The main reason for this is the significant reduction of surgical trauma with the minimisation or even elimination of incisions. Temporomandibular joint pathology remains poorly understood and treatment is controversial. For this reason, application of MIS to temporomandibular joints (TMJ-MIS) could be an option for patients with failure of conservative management and where open treatment could be considered aggressive although TMJ-MIS itself is also considered controversial. In this paper, we will examine the different aspects of developing TMJ-MIS in the future: biology and diagnosis, diagnostic arthroscopy, surgical technique, knowledge and training, and different treatments.

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Multi-slice real-time MRI of temporomandibular joint dynamics

Abstract: The improved access to TMJ dynamics by multi-slice real-time MRI will contribute to more effective treatment of temporomandibular disorders.

Cited by 23 publications

References 29 publications

Simultaneous dual-plane, real-time magnetic resonance imaging of oral cavity movements in advanced trombone players

Simultaneous dual-plane, real-time magnetic resonance imaging of oral cavity movements in advanced trombone players

Outpacing movement — ultrafast volume coverage in neuropediatric magnetic resonance imaging

Future of minimally invasive surgery in temporomandibular joint pathology

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