Purpose: To explore the application of magnetic resonance imaging (MRI) T2 mapping technique in clinical practice through morphological and quantitative analysis of T2 mapping sequences in adolescents with temporomandibular disorders (TMDs) and control groups comprising healthy participants.
Patients and Methods: A total of 45 and 63 patients, who had articular disc displacement with and without reduction, respectively, were assigned to the experimental groups, and 57 participants with normal articular discs of the temporomandibular joint were considered as the control group. All participants in the three groups underwent MRI. T2 mapping was performed in the oblique sagittal plane. The regions of interest (ROIs) for the T2 relaxation time maps of the disc were selected manually. The performance of morphological and structural changes and quantitative parameters in MRI T2 mapping image artifacts were statistically compared.
Results: In the control group, the mean T2 value was 39.284 ± 5.634 ms, in the group of disc displacement with reduction, the mean T2 value was 33.634 ± 4.235 ms, and in the group of disc displacement without reduction, the mean T2 value was 30.982 ± 3.205 ms. The T2 mapping values of the experimental groups, together with different morphological structures, were significantly lower than were those of the control group.
Conclusion: MRI T2 mapping enables a more accurate evaluation of TMD severity. Sequentially, it helps provide a more reliable medical imaging basis for classifying diagnosis and evaluation in clinical practice.

Keywords: temporomandibular joint disorders, articular disc of temporomandibular joint, adolescents, magnetic resonance imaging


中文翻译：

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MRI T2映射图像在青少年颞下颌关节盘移位中的应用探讨

目的：通过对颞下颌关节紊乱病（TMDs）青少年和由健康参与者组成的对照组的 T2 映射序列的形态学和定量分析，探讨磁共振成像（MRI）T2 映射技术在临床实践中的应用。
患者和方法：试验组分别有关节盘移位伴复位和不复位的患者45例和63例，颞下颌关节盘正常的57例为对照组。三组的所有参与者都接受了MRI检查。T2 映射在斜矢状面进行。手动选择椎间盘 T2 弛豫时间图的感兴趣区域 (ROI)。对 MRI T2 映射图像伪影中的形态学和结构变化以及定量参数的表现进行了统计比较。
结果：对照组平均T2值为39.284±5.634 ms，椎间盘移位伴复位组平均T2值为33.634±4.235 ms，椎间盘移位未复位组平均T2值为30.982 ± 3.205 毫秒。实验组的T2映射值以及不同的形态结构显着低于对照组。
结论： MRI T2 映射能够更准确地评估 TMD 严重程度。进而为临床实践中的分类诊断和评价提供更可靠的医学影像依据。

关键词：颞下颌关节疾病，颞下颌关节盘，青少年，磁共振成像