Ultrashort echo time imaging of normal middle ear ossicles

A feasibility study

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)601-604
Number of pages4
JournalDentomaxillofacial Radiology
Volume41
Issue number7
DOIs
Publication statusPublished - Oct 1 2012

Fingerprint

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)

Cite this

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

In: Dentomaxillofacial Radiology, Vol. 41, No. 7, 01.10.2012, p. 601-604.

Research output: Contribution to journalArticle

Yamashita, Koji ; Yoshiura, T. ; Akio, Hiwatashi ; Kamano, H. ; Honda, Hiroshi. / Ultrashort echo time imaging of normal middle ear ossicles : A feasibility study. In: Dentomaxillofacial Radiology. 2012 ; Vol. 41, No. 7. pp. 601-604.
@article{bef597168ffe4d23a3c67c40374ec094,
title = "Ultrashort echo time imaging of normal middle ear ossicles: A feasibility study",
abstract = "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.",
author = "Koji Yamashita and T. Yoshiura and Hiwatashi Akio and H. Kamano and Hiroshi Honda",
year = "2012",
month = "10",
day = "1",
doi = "10.1259/dmfr/23423376",
language = "English",
volume = "41",
pages = "601--604",
journal = "Dentomaxillofacial Radiology",
issn = "0250-832X",
publisher = "British Institute of Radiology",
number = "7",

}

TY - JOUR

T1 - Ultrashort echo time imaging of normal middle ear ossicles

T2 - A feasibility study

AU - Yamashita, Koji

AU - Yoshiura, T.

AU - Akio, Hiwatashi

AU - Kamano, H.

AU - Honda, Hiroshi

PY - 2012/10/1

Y1 - 2012/10/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84866595566&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866595566&partnerID=8YFLogxK

U2 - 10.1259/dmfr/23423376

DO - 10.1259/dmfr/23423376

M3 - Article

VL - 41

SP - 601

EP - 604

JO - Dentomaxillofacial Radiology

JF - Dentomaxillofacial Radiology

SN - 0250-832X

IS - 7

ER -