PMID- 33735379
OWN - NLM
STAT- MEDLINE
DCOM- 20220404
LR  - 20220405
IS  - 1460-2210 (Electronic)
IS  - 0141-5387 (Linking)
VI  - 43
IP  - 6
DP  - 2021 Dec 1
TI  - Cephalometry without complex dedicated postprocessing in an oriented magnetic 
      resonance imaging dataset: a pilot study.
PG  - 614-621
LID - 10.1093/ejo/cjaa066 [doi]
AB  - OBJECTIVES: Magnetic resonance imaging (MRI) enables a 3D-volume-imaging without 
      ionizing radiation. Therefore, it was the aim of this study to present a 
      post-processing-free method for cephalometric analysis of a MRI-dataset and to 
      examine whether there is a significant difference between cephalometric analysis 
      of conventional 2D cephalograms and MRI scans. METHODS: One MRI scan each was 
      performed on three cadaver heads using a 3T-MR-scanner. Cephalometric analysis 
      was conducted directly on the 3D dataset. All reference points were projected 
      onto a virtual sagittal plane that was perpendicular to the Frankfort horizontal 
      plane. Double-sided points were averaged. Cephalometric angles were measured from 
      the projected points. Results were compared with cephalometric measurements on 
      conventional lateral cephalometric radiographs (LCRs). The cephalometric analysis 
      was performed by five raters. RESULTS: 390-angle measurements were obtained. The 
      inter-rater reliability was high [intraclass correlation coefficients (ICCs) >/= 
      0.74 for all angles]. Differences between the measurements on the cephalograms 
      and MRI scans ranged between -0.91 degrees  (-1.88 degrees , 0.07 degrees ) and 0.97 degrees  (-0.63 degrees , 2.57 degrees ) on 
      average and were equivalent with respect to a margin of [-2 degrees , 2 degrees ] in all angles 
      except L1-Me-Tgo (Bonferroni-Holm-corrected P < 0.05 in all angles except 
      L1-Me-Tgo). The best match was found for the SNA angle. CONCLUSION: The clinical 
      comparability of the MRI- and LCR-based cephalometry could be stated. Using MRI 
      in orthodontics would reduce radiation exposure and the risk of stochastic 
      radiation damage, which is of importance especially in younger patients.
CI  - (c) The Author(s) 2021. Published by Oxford University Press on behalf of the 
      European Orthodontic Society. All rights reserved. For permissions, please email: 
      journals.permissions@oup.com.
FAU - Marz, Karoline
AU  - Marz K
AD  - Department of Orthodontics and Orofacial Orthopedics, 
      Friedrich-Alexander-University Erlangen-Nurnberg, Germany.
FAU - Chepura, Taras
AU  - Chepura T
AD  - Department of Orthodontics and Orofacial Orthopedics, 
      Friedrich-Alexander-University Erlangen-Nurnberg, Germany.
FAU - Plewig, Blanka
AU  - Plewig B
AD  - Department of Orthodontics and Orofacial Orthopedics, 
      Friedrich-Alexander-University Erlangen-Nurnberg, Germany.
FAU - Haddad, Daniel
AU  - Haddad D
AD  - Magnetic Resonance and X-ray Imaging Department of the Development Centre X-ray 
      Technology EZRT, Division of Fraunhofer Institute for Integrated Circuits IIS, 
      Wurzburg, Germany.
FAU - Weber, Daniel
AU  - Weber D
AD  - Magnetic Resonance and X-ray Imaging Department of the Development Centre X-ray 
      Technology EZRT, Division of Fraunhofer Institute for Integrated Circuits IIS, 
      Wurzburg, Germany.
FAU - Schmid, Matthias
AU  - Schmid M
AD  - Institute for Medical Biometry, Informatics and Epidemiology (IMBIE), Faculty of 
      Medicine, University of Bonn, Germany.
FAU - Hirschfelder, Ursula
AU  - Hirschfelder U
AD  - Department of Orthodontics and Orofacial Orthopedics, 
      Friedrich-Alexander-University Erlangen-Nurnberg, Germany.
FAU - Golz, Lina
AU  - Golz L
AD  - Department of Orthodontics and Orofacial Orthopedics, 
      Friedrich-Alexander-University Erlangen-Nurnberg, Germany.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Eur J Orthod
JT  - European journal of orthodontics
JID - 7909010
SB  - IM
MH  - Cephalometry/methods
MH  - Humans
MH  - *Imaging, Three-Dimensional/methods
MH  - *Magnetic Resonance Imaging/methods
MH  - Pilot Projects
MH  - Reproducibility of Results
EDAT- 2021/03/19 06:00
MHDA- 2022/04/05 06:00
CRDT- 2021/03/18 17:46
PHST- 2021/03/19 06:00 [pubmed]
PHST- 2022/04/05 06:00 [medline]
PHST- 2021/03/18 17:46 [entrez]
AID - 6178327 [pii]
AID - 10.1093/ejo/cjaa066 [doi]
PST - ppublish
SO  - Eur J Orthod. 2021 Dec 1;43(6):614-621. doi: 10.1093/ejo/cjaa066.