Principles of the magnetic resonance imaging movie method for articulatory movement

Yoshida, Midori; Honda, Eiichi; Ozawa, Erika; Inoue-Arai, Maristela Sayuri; Ohmori, Hidenobu; Moriyama, Keiji; Ono, Takashi; Kurabayashi, Tohru; Yoshihara, Hozumi; Nunthayanon, Kulthida

doi:10.1007/s11282-018-0347-7

Cited by 7 publications

(8 citation statements)

References 37 publications

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“…GREs have some variations and are typically classified into coherent type and incoherent type (see the list of GRE acronyms from different vendors in the Supplementary Materials). The former type refers to steady‐state free‐precession (SSFP) and balanced SSFP sequences that utilize the effect of residual transverse magnetization, such as fast imaging with steady‐state precession (FISP) and true FISP, while the latter, such as fast low‐angle shot (FLASH), spoils the transverse magnetization 14,35 …”

Section: Dynamic Real‐time Mrimentioning

confidence: 99%

“…Apart from the balanced SSFP sequence, spoiled GRE was also utilized in dynamic MRI and exhibited good performance regarding anatomical visibility, diagnostic confidence, and TMJ function in both healthy volunteers and TMD patients 14,42 . However, as a bilaterally coupled joint, the movement of both TMJs can affect and interact with each other, especially in pathological conditions; therefore, it is necessary to simultaneously image the movement of both sides for better evaluation of TMD by multislice dynamic MRI.…”

Section: Dynamic Real‐time Mrimentioning

confidence: 99%

“…With the development of MRI hardware and techniques in recent decades, the image quality has significantly improved and real dynamic imaging has become possible in MRI of TMD. 13,14 More important, quantitative and functional evaluation of multiple biochemical properties of TMJ structures has become feasible, and has been preliminarily investigated by applying various MRI sequences and sophisticated postprocessing algorithms, [15][16][17] thereby providing a better understanding of TMJ structures and a better comprehension of its disorders. Moreover, using the novel technique of zero echo time (ZTE), the comparable diagnostic value of osseous abnormalities in TMJ has also been achieved in MRI.…”

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confidence: 99%

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MRI of Temporomandibular Joint Disorders: Recent Advances and Future Directions

Xiong

Zheng

Tang

et al. 2020

Magnetic Resonance Imaging

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Temporomandibular joint disorders (TMDs) are a prevalent disease covering pain and dysfunction of temporomandibular joints and masticatory muscles, which can be detrimental to quality of life. Magnetic resonance imaging (MRI) is a powerful and noninvasive tool for the imaging and understanding of TMD. With the recent technical development of dynamic and quantitative MRI techniques, including diffusion‐weighted imaging, T2 mapping, and ultrashort/zero echo time, it is now feasible in TMD imaging and has been preliminarily investigated with promising results. In this review we will discuss the recent advances of MRI techniques in TMD and its future directions, and hope to highlight the scientific potential and clinical value of novel MRI techniques in diagnosing and treating TMD. Level of Evidence 4 Technical Efficacy Stage 3

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Section: Dynamic Real‐time Mrimentioning

confidence: 99%

Section: Dynamic Real‐time Mrimentioning

confidence: 99%

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confidence: 99%

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MRI of Temporomandibular Joint Disorders: Recent Advances and Future Directions

Xiong

Zheng

Tang

et al. 2020

Magnetic Resonance Imaging

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“…In this study, children’s elbow articular cartilage showed equisignal or slightly higher signal on FS-T2WI and FS-PDWI, while there was obvious high signal on the 3D-FS-FSPGR/3D-FSPGR sequence, and the endochondral fracture lines were low signal in this sequence. Although the 3D-FS-FSPGR/3D-FSPGR sequence is not sensitive to ligament damage and is susceptible to metal artifacts and motion artifacts [ 24 ], it is sensitive to articular cartilage fractures. This sequence can provide a reliable basis for the selection of treatment options for children with HLCFs in clinical practice.…”

Section: Discussionmentioning

confidence: 99%

Clinical value of MRI in evaluating and diagnosing of humeral lateral condyle fracture in children

et al. 2021

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Background Humeral lateral condyle fractures (HLCFs) are common paediatric fractures. Radiographs are hard to accurately evaluate and diagnose the damage of articular epiphyseal cartilage in HLCFs. Methods 60 children who should be suspected to be HLCFs in clinical practice from Dec 2015 to Nov 2017 were continuously included as the first part patients. Subsequently, 35 HLCFs patients with complete follow-up information who had no obvious displacement on radiograph were the second part patients. The sensitivity and specificity of radiograph and MRI in diagnosing of HLCFs and their stability were calculated respectively. Calculated the sensitivity and specificity of each scan sequence of MRI in diagnosing of HLCFs osteochondral fractures. The degree of fracture displacement was measured respectively. Compared the ratio of surgical treatment, secondary fracture displacement and complications between the stable fracture group and the unstable fracture group on MRI in part 2 patients. Results Sensitivity of diagnosing HLCFs by MRI was significantly higher than radiograph (100.00% vs. 89.09%, P = 0.03). Sensitivity of diagnosing integrity of trochlear cartilage chain by MRI was 96.30%, which was significantly higher than that by radiograph (62.96%, P < 0.01). The sensitivity of cartilage sensitive sequence (3D-FS-FSPGR/3D-FSPGR) was different with FS-PDWI and FS-T2WI (P = 0.01 and P = 0.02, respectively). The degree of HLCFs displacement by MRI was higher than radiograph (P < 0.05). In the unstable fracture group, 5 cases (45.45%) had a fracture displacement of more than 2 mm on MRI, which was significantly higher than that in stable fracture group (0.00%, P < 0.01). Conclusions MRI is superior to the radiograph of elbow joint in evaluating and diagnosing children HLCFs and their stability. The coronal 3D-FS-FSPGR/3D-FSPGR sequence is a significant sequence for diagnosing osteochondral fractures in HLCFs. MRI can provide important clinical value for treatment decisions of HLCFs without significant displacement.

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“…In contrast, magnetic resonance imaging (MRI) is non-invasive and can exhibit the teeth and soft tissues using a contrast agent; a modified technique, such as an MRI movie, can delineate the dynamic movement of the organs and tissues. [7][8][9][10][11][12] is method has made it possible not only to observe the articulation but also to measure the relationship between the teeth and the tongue, which is currently unknown. Nunthayanon et al [11] have reported the positional differences in the articulatory organs during pronunciation between Japanese and ai females with a normal occlusion using an MRI movie.…”

Section: Introductionmentioning

confidence: 99%

Preliminary study of articulatory characteristics in open bite subjects revealed by 3T magnetic resonance imaging movies

Ozawa

Honda

Tomizato

et al. 2021

APOS

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Objectives: Previous studies have reported that articulatory dysfunction accompanied by a certain type of malocclusion can be improved by orthodontic treatment. We developed a 3-T magnetic resonance imaging (MRI) movie method with tooth visualization that can display the dynamic movement of articulation without radiation exposure. To the best of our knowledge, there is currently no report on the possible differences in articulatory movement between subjects with a normal occlusion and those with malocclusion using the 3T MRI movie method. Thus, the objective of this study was to examine the articulatory difference between subjects with a normal occlusion and those with an open bite using an MRI movie. Materials and Methods: Twenty healthy adult females, ten with a normal occlusion and ten with an anterior open bite were recruited. The overbite of the open bite subjects was zero or smaller, and all of them exhibited a tongue-thrusting habit during swallowing. A turbo spin echo image with a contrast medium was used to visualize the anterior teeth, and articulatory movement during articulation of the vowel-consonant-vowel syllable (/asa/) was scanned. The difference in tongue movement between subjects with a normal occlusion and those with an open bite was compared by measuring seven variables. Moreover, the distance between the incisal edge and the tongue apex during articulation of /s/ and the speech duration were compared. Furthermore, frequency analysis on /s/ by fast Fourier transform power spectrum was performed. Results: The tongue apex of the open bite subjects moved more anteriorly than that of the normal subjects. However, there was no significant difference in the phonetic analysis between subjects with a normal occlusion and those with an open bite. Conclusion: The 3-T MRI movie was an efficient method to quantify articulatory tongue movements. Although there was a difference in tongue movement during swallowing between subjects with a normal occlusion and those with an open bite, the difference in the articulatory tongue movements was minimal, suggesting it could be a functional compensation.

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Principles of the magnetic resonance imaging movie method for articulatory movement

Cited by 7 publications

References 37 publications

MRI of Temporomandibular Joint Disorders: Recent Advances and Future Directions

MRI of Temporomandibular Joint Disorders: Recent Advances and Future Directions

Clinical value of MRI in evaluating and diagnosing of humeral lateral condyle fracture in children

Preliminary study of articulatory characteristics in open bite subjects revealed by 3T magnetic resonance imaging movies

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