Parameters for Diffusion Weighted Magnetic Resonance Imaging for Temporomandibular Joint
| Autor: | Takamichi Otonari, Mai Ohkubo, Takuya Harada, Tsukasa Sano, Mamoru Wakoh, Mika Yamamoto |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Temporomandibular Joint medicine.diagnostic_test Echo-Planar Imaging Image quality business.industry Mandibular Condyle Magnetic resonance imaging General Medicine Steady-state free precession imaging Temporomandibular joint Diffusion Magnetic Resonance Imaging Nuclear magnetic resonance medicine.anatomical_structure Signal-to-noise ratio (imaging) Synovial Fluid medicine Spin echo Humans Diffusion (business) Nuclear medicine business Diffusion MRI |
| Zdroj: | The Bulletin of Tokyo Dental College. 47:5-12 |
| ISSN: | 0040-8891 |
| Popis: | The purpose of this study was to determine optimum diffusion parameters for diffusion weighted imaging (DWI) techniques, including echo planer imaging (EPI), single-shot fast spin echo (SSFSE), and steady-state free precession (SSFP) in Magnetic Resonance Imaging (MRI) of the Temporomandibular Joint (TMJ). A polyethylene tube with distilled water was individually positioned at the external acoustic meatus foramen in each of three volunteers with normal healthy TMJs. Images were obtained using three types of DWI at differing diffusion parameters, b-factors, and diffusion moment. Signal intensity and imaging ability for various anatomical structures, including the distilled water, were evaluated from each image. The details of the anatomical structures of the TMJ were unidentifiable in the images produced with EPI and SSFSE, but were identifiable on the SSFP images. A diffusion moment value from 100 mT/m(*)msec to 150 mT/m(*)msec for SSFP, in particular, restrained the signal intensity of the water, thereby protecting the comparably high image quality of the TMJ structure. In conclusion, only SSFP is capable of allowing interpretation of emerging pathologic conditions in the TMJ region, when used with a diffusion moment set at between from approximately 100 mT/m(*)msec to 150 mT/m(*)msec. |
| Databáze: | OpenAIRE |
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