開口に伴う関節円板位置変化のMRIによる観察-矢状断MRIについて-

スポンサーリンク

概要

• 論文の詳細を見る

• Magnetic Resonance (MR) Imaging with surface coils is a proved method for assessment of internal derangements of the ternporomandibular joint and is rapidly surpassing arthrography and CT as the imaging method of choice.<BR>The major advantages of MR imaging in comparison with arthrography and CT are; 1. it is noninvasive, 2. it requires no ionizing radiation for image acquisition, 3. it permits direct visualization of the disk and joint structures.<BR>Examinations of the TMJ were performed on a 1.5 tesla imaging system (Magnetom, Simens Co.) using a Modulated Helmholtz type coil. 17 cm in diameter developed in Kameda General Hospital in order to increase signal to noise ratio in the area of bilateral TM.Js. The repetition time (TR) was 120 msec, the echo time (TE) was 15 msec, and field of view was 17 cm. The data matrix was 256×256. The following results were obtained:(Note: colon should be used)<BR>1. Sagital MRI of normal TMJ in the closed position: The image showed the normal biconcave lens-like configuration disk, with the posterior band in the superior position.<BR>2. Sagital MRI of normal TMJ in the open position: The disk was interposed between the condyle and tubercle.<BR>3. Disk displacement with reduction: The image showed anterior displacement of disk, with the jaw open the disk had normal relationship to the condylar head inferiorly and the tubercle superiorly.<BR>4. Disk displacement without reduction: The image showed the disk remains displaced anterior to the condylar head at all jaw positions.

• 社団法人 日本口腔外科学会の論文

著者

• 久木元 喜昭

  亀田総合病院歯科口腔外科

• 久木元 恭子

  亀田総合病院歯科口腔外科

関連論文

• MRIにおける金属アーチファクトの検討 (第一報)
• Research and development of MRI surface coil for TMJ MR imaging. Modulated helmholtz surface coil.:Modulated Helmholtz surface coil
• 開口に伴う関節円板位置変化のMRIによる観察-矢状断MRIについて-

スポンサーリンク