Ultrashort echo time imaging of normal middle ear ossicles

A feasibility study

Koji Yamashita, T. Yoshiura, Hiwatashi Akio, H. Kamano, Hiroshi Honda

研究成果: ジャーナルへの寄稿記事

6 引用 (Scopus)

抄録

Objective: The aim of this study was to assess the feasibility of ultrashort echo time (UTE) imaging in the visualization of middle ear ossicles in normal subjects. Methods: 12 young adult volunteers (males/females=6/6, age 25-44 years, mean 30.3 years) with normal hearing levels underwent MRI studies using a 3.0T clinical unit with an eightchannel SENSE head coil. For each subject, the whole head was imaged using a threedimensional dual-echo UTE imaging sequence with radial trajectory and the following parameters: field of view, 240×240×240mm; matrix, 320×320; flip angle, 7° repetition time/ echo time (TE)1/TE2, 8.0ms/0.14 ms/1.8 ms; acquisition voxel size, 0.75×0.75×0.75mm; number of signals averaged, 1; imaging time, 27 min 20 s. Subsequently, subtraction images were obtained by subtracting long TE (1.8ms) images from short TE (0.14 ms) images. By using these three images, the visibility of the bilateral middle ear ossicles was evaluated. Moreover, as a reference for theUTE findings, CT images of the temporal bone were obtained in one volunteer. Results: In all subjects, the middle ear ossicles were clearly visualized as a high signal intensity spot surrounded by a signal void of air on short TE images bilaterally, while they were not visible in long TE images in any of the subjects. The subtraction images provided better contrast of the ossicles. Conclusion: We demonstrated the feasibility of UTE imaging of the middle ear ossicle in normal subjects.

元の言語英語
ページ(範囲)601-604
ページ数4
ジャーナルDentomaxillofacial Radiology
41
発行部数7
DOI
出版物ステータス出版済み - 10 1 2012

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Ear Ossicles
Feasibility Studies
Middle Ear
Volunteers
Head
Temporal Bone
Hearing
Young Adult

All Science Journal Classification (ASJC) codes

  • Otorhinolaryngology
  • Radiology Nuclear Medicine and imaging
  • Dentistry(all)

これを引用

Ultrashort echo time imaging of normal middle ear ossicles : A feasibility study. / Yamashita, Koji; Yoshiura, T.; Akio, Hiwatashi; Kamano, H.; Honda, Hiroshi.

:: Dentomaxillofacial Radiology, 巻 41, 番号 7, 01.10.2012, p. 601-604.

研究成果: ジャーナルへの寄稿記事

Yamashita, Koji ; Yoshiura, T. ; Akio, Hiwatashi ; Kamano, H. ; Honda, Hiroshi. / Ultrashort echo time imaging of normal middle ear ossicles : A feasibility study. :: Dentomaxillofacial Radiology. 2012 ; 巻 41, 番号 7. pp. 601-604.
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