Magnetic resonance imaging of the temporomandibular joint Value of pseudodynamic images

Ren, Yan-Fang; Westesson, Per‐Lennart; Isberg, Annika

doi:10.1016/s1079-2104(96)80158-2

Cited by 21 publications

(10 citation statements)

References 21 publications

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“…On the other hand, the medio-lateral displacement of the TMJ disc was difficult to be estimated because of the mid-sagittal images of mandibular condyle in FIESTA-MRI. The similar situation was also mentioned by a previous report [18]. While we did not observe this form of internal derangement, we intended to further evaluate the efficacy of this protocol in detecting the rotational or sideways displacement.…”

Section: Discussionsupporting

confidence: 78%

Dynamic MR imaging of temporomandibular joint: an initial assessment with fast imaging employing steady-state acquisition sequence

Sun

Dong

Tao

et al. 2015

Magnetic Resonance Imaging

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Section: Discussionsupporting

confidence: 78%

Dynamic MR imaging of temporomandibular joint: an initial assessment with fast imaging employing steady-state acquisition sequence

Sun

Dong

Tao

et al. 2015

Magnetic Resonance Imaging

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“…Hence, to optimize the CNR efficiency, what needs to be optimized in the numerical simulations is the expression in Eq. [3] divided by HTR.…”

Section: Theorymentioning

confidence: 99%

“…Its crucial role in mastication and speech production underline the importance of this joint, necessitating an understanding of its complex anatomy and familiarity with commonly encountered pathology (2). Currently, MR imaging is accepted as the most accurate means of noninvasive evaluation of the soft tissues of the joint (3)(4)(5)(6)(7).…”

mentioning

confidence: 99%

Optimizing MR signal contrast of the temporomandibular joint disk

Carl¹,

Sanal

Diaz

et al. 2011

Magnetic Resonance Imaging

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Purpose: To use a tissue specific algorithm to numerically optimize UTE sequence parameters to maximize contrast within temporomandibular joint (TMJ) donor tissue. Materials and Methods:A TMJ specimen tissue block was sectioned in a true sagittal plane and imaged at 3 Tesla (T) using UTE pulse sequences with dual echo subtraction. The MR tissue properties (PD, T 2 , T 2 *, and T 1 ) were measured and subsequently used to calculate the optimum sequences parameters (repetition time [TR], echo time [TE], and y).Results: It was found that the main contrast available in the TMJ could be obtained from T 2 (or T 2 *) contrast. With the first echo time fixed at 8 ms and using TR ¼ 200 ms, the optimum parameters were found to be: y % 60 , and TE2 % 15 ms, when the second echo is acquired using a gradient echo and y % 120 , and TE2 % 15 ms, when the second echo is acquired using a spin echo. Conclusion:Our results show that MR signal contrast can be optimized between tissues in a systematic manner. The MR contrast within the TMJ was successfully optimized with facile delineation between disc and soft tissues.

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“…Diagnosis of TMD using MR imaging is performed clinically [25–29]. However, the focus of conventional MRI has been on the diagnosis of disc displacement and synovial effusion; in general, their performance in the detection of osteoarthritis of the TMJ has been poor [19].…”

Section: Introductionmentioning

confidence: 99%

“…However, the focus of conventional MRI has been on the diagnosis of disc displacement and synovial effusion; in general, their performance in the detection of osteoarthritis of the TMJ has been poor [19]. While techniques have been introduced to improve visualization of the TMJ anatomy [25, 27], significant challenges remain due to the fibrocartilaginous nature of TMJ soft tissues and their intrinsically short T2 properties as well as susceptibility artifacts due to subjacent mastoid air cells. In many clinical MRIs, TMJ discs exhibit low signals, making their evaluation challenging.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of quantitative UTE MRI to the biomechanical property of the temporomandibular joint disc

et al. 2014

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Purpose To quantify MR properties of discs from cadaveric human temporomandibular joints (TMJ) using quantitative conventional and ultrashort time-to-echo magnetic resonance imaging (UTE MRI) techniques and to corroborate regional variation in the MR properties with that of biomechanical indentation stiffness. Methods This study was exempt from the institutional review board approval. Cadaveric (four donors, two females, 74±10.7 years) TMJs were sliced (n=14 slices total) sagittally and imaged using quantitative techniques of conventional spin echo T2 (SE T2), UTE T2*, and UTE T1rho. The discs were then subjected to biomechanical indentation testing, which is performed by compressing the tissue with the blunt end of a small solid cylinder. Regional variations in MR and indentation stiffness were correlated. TMJ of a healthy volunteer was also imaged to show in vivo feasibility. Results Using the ME SE T2 and the UTE T1rho techniques, a significant (each p<0.0001) inverse relation between MR and indentation stiffness properties was observed for the data in the lower range of stiffness. However, the strength of correlation was significantly higher (p<0.05) for UTE T1rho (R2=0.42) than SE T2 (R2=0.19) or UTE T2* (R2=0.02, p=0.1) techniques. Conclusion The UTE T1rho technique, applicable in vivo, facilitated quantitative evaluation of TMJ discs and showed a high sensitivity to biomechanical softening of the TMJ discs. With additional work, the technique may become a useful surrogate measure for loss of biomechanical integrity of TMJ discs reflecting degeneration.

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Magnetic resonance imaging of the temporomandibular joint Value of pseudodynamic images

Cited by 21 publications

References 21 publications

Dynamic MR imaging of temporomandibular joint: an initial assessment with fast imaging employing steady-state acquisition sequence

Dynamic MR imaging of temporomandibular joint: an initial assessment with fast imaging employing steady-state acquisition sequence

Optimizing MR signal contrast of the temporomandibular joint disk

Sensitivity of quantitative UTE MRI to the biomechanical property of the temporomandibular joint disc

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