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Eur J Radiol. 2018 Jan;98:90-99. doi: 10.1016/j.ejrad.2017.10.024. Epub 2017 Oct 31.

Qualitative and semi-quantitative assessment of temporomandibular joint MRI protocols for juvenile idiopathic arthritis at 1.5 and 3.0T.

Author information

1
Department of Diagnostic Imaging, Hospital Sant Joan de Deu, University of Barcelona, Av. Sant Joan de Deu, 2, 08950 Esplugues de Llobregat, Barcelona, Spain. Electronic address: emilioinarejos@gmail.com.
2
Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, University of Toronto, 686 Bay Street, Toronto, ON M5G1A4, Canada. Electronic address: mirkamal.tolend@sickkids.ca.
3
Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, 270 Rama 6 Rd, Rajthevi, Bangkok, 10400, Thailand; Department of Medical Imaging, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON M5G1X8, Canada. Electronic address: thitiporn.pho@mahidol.ac.th.
4
Department of Medical Imaging, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON M5G1X8, Canada. Electronic address: jennifer.stimec@sickkids.ca.
5
PRI - Pediatric Rheumatology Research Institute, Achtern Dieck 9, 24576 Bad Bramstedt, Germany. Electronic address: tzaribachev@pri-research.com.
6
Department of Orthodontics and Orofacial Orthopedics, Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University of Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany. Electronic address: bernd.koos@med.uni-tuebingen.de.
7
Division of Rheumatology, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON M5G1X8, Canada. Electronic address: lynn.spiegel@sickkids.ca.
8
Department of Family and Community Medicine, University of Toronto, 500 University Ave, Toronto, ON M5G1V7, Canada. Electronic address: rahim.moineddin@utoronto.ca.
9
Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, University of Toronto, 686 Bay Street, Toronto, ON M5G1A4, Canada; Department of Medical Imaging, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON M5G1X8, Canada. Electronic address: andrea.doria@sickkids.ca.

Abstract

OBJECTIVE:

Temporomandibular joints (TMJs) frequently develop silent inflammatory and osteochondral changes in children with juvenile idiopathic arthritis. Data-driven recommendations for TMJ imaging protocol are needed to reduce measurement error and scanning time. This study compares the impact of different protocols, imaging coils, and magnet strength on the reliability of image assessment and the subjective quality of images.

MATERIALS AND METHODS:

Three groups of bilateral TMJ MR studies were retrospectively collected from two institutions, including 24 1.5T and 19 3.0T studies using dedicated TMJ surface coils, and 23 1.5T studies with head coil. Post-contrast sequences were re-compiled from the full protocol to create minimum protocol studies for the three groups. Two radiologists and two non-radiologists first scored the three minimum protocol images according to pre-specified definitions, then scored the full protocol images. Minimum-to-full protocol agreement, inter-reader agreement, and subjective item visibility scores were assessed.

RESULTS:

With dedicated TMJ dual surface coils, minimum-vs-full protocol agreement was moderate to good (0.5-0.8 intraclass correlation coefficients or kappa) for most items, and was not influenced by the magnet strength. Inter-reader reliability was more significantly influenced by the imaging coil and reader's training background than by protocol length or magnet strength differences. Sagittal and coronal planes weighted on PD, T2 Fat Suppressed and T1 Fat Suppressed -postcontrast adequately visualized all the different features, whereas the axial plane was more limited to visualizing synovium.

CONCLUSION:

Inter-reader reliability and qualitative measure of image quality improved more consistently with the coil offering the higher resolution, rather than increased magnet strength.

KEYWORDS:

1.5 and 3.0T magnets; Juvenile idiopathic arthritis; MRI protocols; Reliability; Temporomandibular joints

PMID:
29279176
DOI:
10.1016/j.ejrad.2017.10.024
[Indexed for MEDLINE]

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