Effect of interference of metallic objects on interpretation of T1-weighted magnetic resonance images in the maxillofacial region

Metallic objects produce artifacts on magnetic resonance (MR) images. However, studies on typical dental materials in this area are scant. This study was conducted to describe and measure the magnitude of such artifacts. Samples of various dental materials (dental gold, amalgam, stainless steel, tit...

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Bibliographic Details
Published in:Oral surgery, oral medicine, oral pathology, oral radiology and endodontics oral medicine, oral pathology, oral radiology and endodontics, 2000-06, Vol.89 (6), p.759-765
Main Authors: ABBASZADEH, K, HEFFEZ, L. B, MAFEE, M. F
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Bone Screws
Cattle
Crowns
Dental Alloys
Dental Implants
Dentistry
Face - anatomy & histology
Facial bones, jaws, teeth, parodontium: diseases, semeiology
Investigative techniques, diagnostic techniques (general aspects)
Jaw - anatomy & histology
Magnetic Resonance Imaging - methods
Magnetic Resonance Imaging - standards
Medical sciences
Muscles - anatomy & histology
Non tumoral diseases
Otorhinolaryngology. Stomatology
Otorhinolaryngology. Stomatology. Orbit
Radiodiagnosis. Nmr imagery. Nmr spectrometry
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Summary:Metallic objects produce artifacts on magnetic resonance (MR) images. However, studies on typical dental materials in this area are scant. This study was conducted to describe and measure the magnitude of such artifacts. Samples of various dental materials (dental gold, amalgam, stainless steel, titanium, silver-palladium, and vitallium) were embedded in bovine muscle and then subjected to T1-weighted MR imaging. The materials were of the typical morphology and composition encountered in routine maxillofacial practice. The MR artifacts were measured and compared with the original specimen measurements. All metallic objects were found to produce artifacts and to interfere with the interpretation of MR images. Artifacts were most pronounced in the central plane of the object. Gold produced the greatest artifact, and amalgam produced the least. Because metals commonly used in the maxillofacial region all produce artifacts on MR images, avoidance measures should be used to minimize the effect of these artifacts.
ISSN:1079-2104
1528-395X
DOI:10.1067/moe.2000.105942