Cinematic study of temporomandibular joint motion using ultra-fast magnetic resonance imaging.

摘要: Magnetic Resonance Images (MRI) of the temporomandibular joint (TMJ) are usually performed to study opening/closing movements mandible and have up now been pseudodynamic step-by-step images simulating condylar motion by post-processing reconstruction. The aim this was: 1. optimize a TMJ cine-imaging method give better clinical result than methods; 2. develop an ultra-fast MRI Gradient Echo (GE) sequence for purpose; 3. analyze in sagittal, coronal para-axial planes during border mandibular displacements chewing. Both TM joints were studied six asymptomatic volunteers. involved compromise between in-plane resolution, slice thickness, signal-to-noise ratio time resolution. Routine use was found be GE pulse providing three per second with isometric voxel resolution approximately two millimeters ridge. This did not allow visualization disk. Using enabled real simultaneous displacement observation space therefore contributed functional diagnosis pathologic motions.