Department of Orthodontics and Radiology, University of São Paulo City (UNICID), São Paulo, SP, Brazil.
Department of Diagnosis and Surgery, São José dos Campos Dental School, São Paulo State University (UNESP), São José dos Campos, SP, Brazil.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2019 Jun;127(6):552-559. doi: 10.1016/j.oooo.2018.11.015. Epub 2018 Dec 2.
The aim of this study was to investigate the effect of enhancement filters on magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ).
In total, 66 MRI scans of the TMJ were analyzed without filtration and with the application of 2 filters: Sharpen 1 and Sharpen 2 (OnDemand software). Two dentomaxillofacial radiologists examined the original and filtered images individually. Intra- and interobserver concordance was measured by using generalized estimating equations. The observers evaluated the subjective image quality and the visibility of 3 components of the TMJ: disk, condyle, and articular eminence. The images were ranked on a 4-point scale, from poor to excellent. The image quality of all filtered images was compared by using the χ test and Bonferroni correction for multiple comparisons.
Intra- and interobserver concordance was good. The images filtered with Sharpen 1 and Sharpen 2 provided better definition of the structures compared with nonfiltered images, providing the highest scores for subjective image quality for all structures (P < .0001).
The use of enhancement filters led to improved subjective quality and may improve the diagnostic efficacy of MRI in TMJ evaluation.
本研究旨在探讨增强滤波器对颞下颌关节（TMJ）磁共振成像（MRI）的影响。
共分析了 66 例 TMJ 的 MRI 扫描，分别在不滤过和应用 Sharpen 1 和 Sharpen 2 两种滤波器（OnDemand 软件）的情况下进行。两名口腔颌面放射科医生分别单独检查原始图像和过滤图像。使用广义估计方程测量观察者内和观察者间的一致性。观察者评估了 TMJ 的 3 个组成部分（盘、髁突和关节突）的主观图像质量和可见度。图像按 4 分制评分，从差到优。使用 χ 检验和 Bonferroni 多重比较校正比较所有过滤图像的图像质量。
观察者内和观察者间的一致性良好。与非过滤图像相比，Sharpen 1 和 Sharpen 2 过滤后的图像对结构的定义更好，为所有结构提供了最高的主观图像质量评分（P <.0001）。
使用增强滤波器可提高主观质量，并可能提高 MRI 在 TMJ 评估中的诊断效果。
