High-resolution morphologic and ultrashort time-to-echo quantitative magnetic resonance imaging of the temporomandibular joint

作者：Bae Won C; Tafur Monica; Chang Eric Y; Du Jiang; Biswas Reni; Kwack Kyu Sung; Healey Robert; Statum Sheronda; Chung Christine B^*

来源：Skeletal Radiology, 2016, 45(3): 383-391.

DOI：10.1007/s00256-015-2305-3

• Temporomandibular joint
• Ultrashort echo time (UTE)
• Magnetic resonance imaging

Objective To implement high-resolution morphologic and quantitative magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) using ultrashort time-to-echo (UTE) techniques in cadavers and volunteers.
Methods This study was approved by the institutional review board. TMJs of cadavers and volunteers were imaged on a 3-T MR system. High-resolution morphologic and quantitative sequences using conventional and UTE techniques were performed in cadaveric TMJs. Morphologic and UTE quantitative sequences were performed in asymptomatic and symptomatic volunteers.
Results Morphologic evaluation demonstrated the TMJ structures in open-and closed-mouth position. UTE techniques facilitated the visualization of the disc and fibrocartilage. Quantitative UTE MRI was successfully performed ex vivo and in vivo, reflecting the degree of degeneration. There was a difference in the mean UTE T2* values between asymptomatic and symptomatic volunteers.
Conclusions MRI evaluation of the TMJ using UTE techniques allows characterization of the internal structure and quantification of the MR properties of the disc. Quantitative UTE MRI can be performed in vivo with short scan times.

• 出版日期2016-3