Development of TMJ coil specialized for 3.0 tesla superconductive MR scanner
Grant-in-Aid for Scientific Research (B)
|Allocation Type||Single-year Grants|
|Research Institution||Osaka University|
MURAKAMI Shumei Osaka University, Graduate School of Dentistry, Associate Professor, 大学院・歯学研究科, 助教授 (00263301)
KAKIMOTO Naoya Osaka University, Graduate School of Dentistry, Research Assistant, 大学院・歯学研究科, 助手 (50324794)
NAKATANI Atsutoshi Osaka University, Graduate School of Dentistry, Research Assistant, 大学院・歯学研究科, 助手 (50362679)
|Project Period (FY)
2002 – 2004
Completed(Fiscal Year 2004)
|Budget Amount *help
¥11,900,000 (Direct Cost : ¥11,900,000)
Fiscal Year 2004 : ¥1,300,000 (Direct Cost : ¥1,300,000)
Fiscal Year 2003 : ¥2,400,000 (Direct Cost : ¥2,400,000)
Fiscal Year 2002 : ¥8,200,000 (Direct Cost : ¥8,200,000)
|Keywords||temporomandbular joint / MRI / superconductive / TMJ dysfunction / coil / 超高磁場MRI / 画像診断|
To develop a surface coil for TMJ specialized for 3.0-T superconductive MR scanner. And to utilize the developed surface coil to cadaver, volunteer.
And to evaluate the performance and capability of the surface coil and develop the adequate sequence for TMJ in 3.0-T MR scanner
Materials and Methods
We made a surface coil for TMJ specialized for 3.0-T superconductive MR scanner considering the inverter circuit and capacitor.
Then, we applied the surface coil to cadavers and volunteers.
In the cadavers study, acquired images were compared with sectional materials from cadavers and images scanned by 1.5-T MR scanner.
In the volunteers study, acquired images were compared with images scanned by 1.5-T MR scanner in signal to noise ratio and contrast ratio.
Results and Conclusion
In the cadavers study, acquired images were more coincident to the sectional materials from cadavers and than the images scanned by 1.5-T MR scanner. In the acquired images, the bone marrow structures and running of the masticators muscles were clearer and more precisely than the images scanned by 1.5-T MR scanner.
In the volunteers study, signal to noise ratio of the acquired images were higher than the images scanned by 1.5-T MR scanner. The contrast ratio, however, was not always higher than the images scanned by 1.5-T MR scanner.
With using this coil in 3.0-T MR scanner, the scanning time will be shortened and signal to noise ratio will be higher than the lower tesla MR scanner, but contrast ratio, especially the contrast between the articular disk and the lateral pterygoid muscle will be low if we use the conventional sequenced for TMJ. So we have to develop a new sequence for TMJ in usage of this coil.
Research Products (13results)