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Artifact on MR imaging by a dental magnetic attachment keeper: Preliminary study on a new keeper removable phantom
Author(s) -
Ogura Ichiro,
Sugawara Yoshihiro,
Nagata Kazuhiro,
Watanabe Mitsuhiro
Publication year - 2019
Publication title -
oral science international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.256
H-Index - 13
eISSN - 1881-4204
pISSN - 1348-8643
DOI - 10.1002/osi2.1007
Subject(s) - imaging phantom , artifact (error) , magnetic resonance imaging , dicom , nuclear medicine , materials science , biomedical engineering , medicine , computer science , radiology , computer vision
Aims Dental magnetic attachments with satisfactory retentive force and stability are now commercially available for dental treatment. The aim of this study was to investigate a new phantom for evaluation of the artifact on magnetic resonance ( MR ) imaging by a dental magnetic attachment keeper. Material and Methods We developed a new keeper removable phantom for evaluation of the artifact on MR imaging. A keeper was inserted in an acrylic pole in a PET bottle. The keeper from acrylic pole of the phantom was removable. The keeper with saline solution in the PET bottle with a head and neck coil underwent MR imaging at our university hospital. We measured the real size (unit: mm) of artifact of the phantom with the keeper using a DICOM viewer. Furthermore, the size of artifact of a patient's image with the same three keepers in the mouth was measured on the image using the DICOM viewer, too. Results In MR images of the phantom with a keeper, the maximum size of artifact on axial T1‐weighted, T2‐weighted and STIR images were 78 mm, 85 mm, and 67 mm, respectively. Regarding MR images of the patient with three keepers, the maximum size of artifact on axial T1‐weighted, T2‐weighted and STIR images were 106 mm, 111 mm and 100 mm, respectively. Conclusions We investigated a new keeper removable phantom for evaluation of the artifact on MR imaging. The phantom can be used to evaluate the artifact on MR imaging by a dental magnetic attachment keeper.