Advanced search
1 file | 2.21 MB

Magnetic resonance imaging of third molars : developing a protocol suitable for forensic age estimation

(2017) ANNALS OF HUMAN BIOLOGY. 44(2). p.130-139
Author
Organization
Abstract
Background: Established dental age estimation methods in sub-adults study the development of third molar root apices on radiographs. In living individuals, however, avoiding ionising radiation is expedient. Studying dental development with magnetic resonance imaging complies with this requirement, adding the advantage of imaging in three dimensions. Aim: To elaborate the development of an MRI protocol to visualise all third molars for forensic age estimation, with particular attention to the development of the root apex. Subjects and methods:Ex vivo scans of porcine jaws and in vivo scans of 10 volunteers aged 17-25 years were performed to select adequate sequences. Studied parameters were T1 vs T2 weighting, ultrashort echo time (UTE), fat suppression, in plane resolution, slice thickness, 3D imaging, signal-to-noise ratio, and acquisition time. A bilateral four-channel flexible surface coil was used. Two observers evaluated the suitability of the images. Results: T2-weighted images were preferred to T1-weighted images. To clearly distinguish root apices in (almost) fully developed third molars an in plane resolution of 0.33 x 0.33 mm(2) was deemed necessary. Taking acquisition time limits into account, only a T2 FSE sequence with slice thickness of 2 mm generated images with sufficient resolution and contrast. UTE, thinner slice T2 FSE and T2 3D FSE sequences could not generate the desired resolution within 6.5 minutes. Conclusion: Three Tesla MRI of the third molars is a feasible technique for forensic age estimation, in which a T2 FSE sequence can provide the desired in plane resolution within a clinically acceptable acquisition time.
Keywords
Surface head coil, apical development, sub-adult, MRI, COMPONENTS, COIL

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 2.21 MB

Citation

Please use this url to cite or link to this publication:

Chicago
De Tobel, Jannick, Elke Hillewig, Stephanie Bogaert, Karel Deblaere, and Koenraad Verstraete. 2017. “Magnetic Resonance Imaging of Third Molars : Developing a Protocol Suitable for Forensic Age Estimation.” Annals of Human Biology 44 (2): 130–139.
APA
De Tobel, J., Hillewig, E., Bogaert, S., Deblaere, K., & Verstraete, K. (2017). Magnetic resonance imaging of third molars : developing a protocol suitable for forensic age estimation. ANNALS OF HUMAN BIOLOGY, 44(2), 130–139.
Vancouver
1.
De Tobel J, Hillewig E, Bogaert S, Deblaere K, Verstraete K. Magnetic resonance imaging of third molars : developing a protocol suitable for forensic age estimation. ANNALS OF HUMAN BIOLOGY. 2017;44(2):130–9.
MLA
De Tobel, Jannick, Elke Hillewig, Stephanie Bogaert, et al. “Magnetic Resonance Imaging of Third Molars : Developing a Protocol Suitable for Forensic Age Estimation.” ANNALS OF HUMAN BIOLOGY 44.2 (2017): 130–139. Print.
@article{8049255,
  abstract     = {Background: Established dental age estimation methods in sub-adults study the development of third molar root apices on radiographs. In living individuals, however, avoiding ionising radiation is expedient. Studying dental development with magnetic resonance imaging complies with this requirement, adding the advantage of imaging in three dimensions. 
Aim: To elaborate the development of an MRI protocol to visualise all third molars for forensic age estimation, with particular attention to the development of the root apex. 
Subjects and methods:Ex vivo scans of porcine jaws and in vivo scans of 10 volunteers aged 17-25 years were performed to select adequate sequences. Studied parameters were T1 vs T2 weighting, ultrashort echo time (UTE), fat suppression, in plane resolution, slice thickness, 3D imaging, signal-to-noise ratio, and acquisition time. A bilateral four-channel flexible surface coil was used. Two observers evaluated the suitability of the images. 
Results: T2-weighted images were preferred to T1-weighted images. To clearly distinguish root apices in (almost) fully developed third molars an in plane resolution of 0.33 x 0.33 mm(2) was deemed necessary. Taking acquisition time limits into account, only a T2 FSE sequence with slice thickness of 2 mm generated images with sufficient resolution and contrast. UTE, thinner slice T2 FSE and T2 3D FSE sequences could not generate the desired resolution within 6.5 minutes. 
Conclusion: Three Tesla MRI of the third molars is a feasible technique for forensic age estimation, in which a T2 FSE sequence can provide the desired in plane resolution within a clinically acceptable acquisition time.},
  author       = {De Tobel, Jannick and Hillewig, Elke and Bogaert, Stephanie and Deblaere, Karel and Verstraete, Koenraad},
  issn         = {0301-4460},
  journal      = {ANNALS OF HUMAN BIOLOGY},
  language     = {eng},
  number       = {2},
  pages        = {130--139},
  title        = {Magnetic resonance imaging of third molars : developing a protocol suitable for forensic age estimation},
  url          = {http://dx.doi.org/10.1080/03014460.2016.1202321},
  volume       = {44},
  year         = {2017},
}

Altmetric
View in Altmetric
Web of Science
Times cited: