Can dynamic magnetic resonance imaging replace static magnetic resonance sequences in evaluation of temporomandibular joint dysfunction?

Kamel, Zeinab Sobhy Ahmed Sayed Ahmed; El-Shafey, Mohammad Hassan Rashad; Hassanien, Omar Ahmed; Nagy, Hanan Ahmad

doi:10.1186/s43055-020-00396-8

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…Magnetic resonance imaging modality was chosen for this study as it is considered the golden standard for TMJ imaging since the early 1990s by [18] then the early 2000s [19] and till 2021 it remains as the best imaging modality and the gold standard as documented by [20] . The standard MR imaging for TMJ as documented by [21] and [22] includes PD and T2-WI.…”

Section: Discussionmentioning

confidence: 99%

Dual-Echo magnetic resonance imaging pulse sequence in diagnosis of temporomandibular disorders

Marzaban

Zayet

Elleithy³

et al. 2022

ijhs

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Objective: This study was conducted to assess the diagnostic accuracy of different MRI pulse sequence dual-echo-PD in the diagnosis of temporomandibular disorders. Subjects and methods: Twenty seven patients (54 Temporomandibular joints) with painful joints or limited mouth opening or unexplained longstanding headache were enrolled in the study to examine the diagnostic accuracy of magnetic resonance imaging sequence dual-echo in delineation of the articular disc position, the disc morphology, and the cortical bone in comparison to the gold standard of MRI scanning sequence: proton density weighted images. Results: Dual-echo-PD weighted image showed 94.7% sensitivity and 96.3% diagnostic accuracy in identifying articular disc position. Dual-echo-PD showed no statistically significant difference than proton-density in delineation of disc morphology or cortical bone. Conclusions: The dual-echo imaging sequence can be used instead of using PD to delineate disc position, morphology, and cortical bone.

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Section: Discussionmentioning

confidence: 99%

Dual-Echo magnetic resonance imaging pulse sequence in diagnosis of temporomandibular disorders

Marzaban

Zayet

Elleithy³

et al. 2022

ijhs

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“…Dynamic and pseudo-dynamic TMJ MRI techniques was introduced by some researchers in 1987 [1]. According to Kamel et al, the dynamic MRI was evaluated as a contemporary diagnostic tool for examination of TMJ by comparing it to the static MRI by clinical findings and ability to diagnose various types of disc displacement, as well as for the assessment of the quality of the image by visibility of the important anatomical TMJ structures such as disc and condyle, and the presence of artifact [29]. Kamel et al concluded that dynamic MRI facilitated visualization of the articular disc during the entire pathway of jaw opening and closing as well as the dynamics of internal derangement and assessment of disc condyle relationship in a short time compared to static MRI.…”

Section: Introductionmentioning

confidence: 99%

A New Mechanical Mouth Opener for Dynamic Magnetic Resonance Imaging of the Temporomandibular Joint

Knezevic,

Boban

et al. 2023

JCM

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(1) Background: During the magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ), it is necessary to scan the joints in the closed- and open-jaw position, as well as in the maximally open-jaw position. In order to examine both joints in these positions, an MRI compatible mouth opener is required, which allows the articular surfaces to maintain their position stably. (2) Methods: In this study, we included 200 patients aged 18 to 65, with various levels of clinical severity. The mouth opener is made of polymethyl methacrylate and used for dynamic imaging of TMJ. It is in the form of an arrow, with incisures on upper and lower surfaces 1 mm apart and these match possible variations in jaw opening. All the patients were scanned with mouth opener and, immediately after this scanning, with syringe (20 ccm) as a standard device used for mouth opening in clinical setting. (3) Results: A total of 200 MR examinations of TMJs were performed and the mechanical mouth opener was successfully applied without artifacts in all patients. The mouth opener device proved to be adequate in case of MRI of the TMJ for different ranges of mouth opening with the proper protocol for provoked imaging, because the incisures are located at a distance of 1 mm and no objective artifacts were observed in any examination that degraded the diagnostic quality of the examination. (4) Conclusions: The design of the acrylate mouth opener is precisely defined, and it has a purpose in the MRI diagnosis of TMJ disorders.

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“…The rest of the redundant images not only slow down the progress of judgment, but also sometimes mislead doctors to a certain extent [ 20 ]. In addition, considering that the diagnosis of MRI images is highly subjective and mostly depends on the experience and professional knowledge of doctors, the lack of talents in this field is also a major reason for the low efficiency of diagnoses [ 21 ]. The low recognition rate of early diagnosis leads to more difficult later-stage treatment, forming a vicious circle [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

AI-Assisted Diagnosis and Decision-Making Method in Developing Countries for Osteosarcoma

Tang

Huang

et al. 2022

Healthcare

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Osteosarcoma is a malignant tumor derived from primitive osteogenic mesenchymal cells, which is extremely harmful to the human body and has a high mortality rate. Early diagnosis and treatment of this disease is necessary to improve the survival rate of patients, and MRI is an effective tool for detecting osteosarcoma. However, due to the complex structure and variable location of osteosarcoma, cancer cells are highly heterogeneous and prone to aggregation and overlap, making it easy for doctors to inaccurately predict the area of the lesion. In addition, in developing countries lacking professional medical systems, doctors need to examine mass of osteosarcoma MRI images of patients, which is time-consuming and inefficient, and may result in misjudgment and omission. For the sake of reducing labor cost and improve detection efficiency, this paper proposes an Attention Condenser-based MRI image segmentation system for osteosarcoma (OMSAS), which can help physicians quickly locate the lesion area and achieve accurate segmentation of the osteosarcoma tumor region. Using the idea of AttendSeg, we constructed an Attention Condenser-based residual structure network (ACRNet), which greatly reduces the complexity of the structure and enables smaller hardware requirements while ensuring the accuracy of image segmentation. The model was tested on more than 4000 samples from two hospitals in China. The experimental results demonstrate that our model has higher efficiency, higher accuracy and lighter structure for osteosarcoma MRI image segmentation compared to other existing models.

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Can dynamic magnetic resonance imaging replace static magnetic resonance sequences in evaluation of temporomandibular joint dysfunction?

Cited by 6 publications

References 25 publications

Dual-Echo magnetic resonance imaging pulse sequence in diagnosis of temporomandibular disorders

Dual-Echo magnetic resonance imaging pulse sequence in diagnosis of temporomandibular disorders

A New Mechanical Mouth Opener for Dynamic Magnetic Resonance Imaging of the Temporomandibular Joint

AI-Assisted Diagnosis and Decision-Making Method in Developing Countries for Osteosarcoma

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