Orthodontic appliances and MR image artefacts : An exploratory in vitro and in vivo study using 1.5-T and 3-T scanners

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Sonesson, MikaelMalmö universitet,Malmö University,Odontologiska fakulteten (OD) (author)

Orthodontic appliances and MR image artefacts : An exploratory in vitro and in vivo study using 1.5-T and 3-T scanners

Article/chapterEnglish2021

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Korean Academy of Oral and Maxillofacial Radiology,2021
13 s.

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LIBRIS-ID:oai:lup.lub.lu.se:9144696a-ae23-4453-ba82-110c7da34206
https://lup.lub.lu.se/record/9144696a-ae23-4453-ba82-110c7da34206URI
https://doi.org/10.5624/isd.20200199DOI
https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-42095URI

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Language:English
Summary in:English

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Purpose: The aim of this study was to assess the artefacts of 12 fixed orthodontic appliances in magnetic resonance images obtained using 1.5-T and 3-T scanners, and to evaluate different imaging sequences designed to suppress metal artefacts. Materials and Methods: In vitro, study casts of 1 adult with normal occlusion were used. Twelve orthodontic appliances were attached to the study casts and scanned. Turbo spin echo (TSE), TSE with high readout bandwidth, and TSE with view angle tilting and slice encoding for metal artefact correction were used to suppress metal artefacts. Artefacts were measured. In vivo, 6 appliances were scanned: 1) conventional stainless-steel brackets; 2) nickelfree brackets; 3) titanium brackets; 4) a Herbst appliance; 5) a fixed retainer; and 6) a rapid maxillary expander. The maxilla, mandible, nasopharynx, tongue, temporomandibular joints, and cranial base/eye globes were assessed. Scores of 0, 1, 2, and 3 indicated no artefacts and minor, moderate, and major artefacts, respectively. Results: In vitro, titanium brackets and the fixed retainer created minor artefacts. In vivo, titanium brackets caused minor artefacts. Conventional stainless-steel and nickel free brackets, the fixed retainer, and the rapid maxillary expander caused major artefacts in the maxilla and mandible. Conventional stainless-steel and nickel-free brackets caused major artefacts in the eye globe (3-T). TSE with high readout bandwidth reduced image artefacts in both scanners. Conclusion: Titanium brackets, the Herbst appliance, and the fixed retainer caused minor artefacts in images of neurocranial structures(1.5-T and 3-T) when using TSE with high readout bandwidth.(Imaging Sci Dent 20200199)

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Odontologi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Dentistry hsv//eng
MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Radiologi och bildbehandling hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Radiology, Nuclear Medicine and Medical Imaging hsv//eng
Artifacts
Magnetic Resonance Imaging
Orthodontic Appliances
Skull
Artifacts

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Al Qabandi, FahadMalmö universitet,Malmö University,Odontologiska fakulteten (OD) (author)
Månsson, SvenLund University,Lunds universitet,Medicinsk strålningsfysik, Malmö,Forskargrupper vid Lunds universitet,Medical Radiation Physics, Malmö,Lund University Research Groups,Lund Univ, Skane Univ Hosp, Dept Translat Med, Med Radiat Phys, Malmo, Sweden.(Swepub:lu)ront-sma (author)
Abdulraheem, SalemMalmö universitet,Malmö University,Al Jahra Specialized Dental Center,Odontologiska fakulteten (OD),Department of Orthodontics, Al-Jahra Specialty Dental Center, Ministry of Health, Kuwait(Swepub:mau)ae1168 (author)
Bondemark, LarsMalmö universitet,Malmö University,Odontologiska fakulteten (OD)(Swepub:mau)odlabo (author)
Hellén-Halme, KristinaMalmö universitet,Malmö University,Odontologiska fakulteten (OD)(Swepub:mau)odkrhe (author)
Malmö UniversityOdontologiska fakulteten (OD) (creator_code:org_t)

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In:Imaging Science in Dentistry: Korean Academy of Oral and Maxillofacial Radiology512233-78222233-7830

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By the author/editor: Sonesson, Mikael; Al Qabandi, Faha ...; Månsson, Sven; Abdulraheem, Sal ...; Bondemark, Lars; Hellén-Halme, Kr ...

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Dentistry

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