Primary Observation by Measuring Magnetic Resonance Artifacts Caused by Metallic Dental Materials
- VernacularTitle:口腔用金属材料的磁共振伪影的检测
- Author:
Chun XIE
;
Liying YU
;
Yi ZHOU
;
Jiang LIN
- Publication Type:Journal Article
- From:
Fudan University Journal of Medical Sciences
2001;28(2):124-126
- CountryChina
- Language:Chinese
-
Abstract:
PurposeTo evaluate the existence and extent of magnetic resonance(MR) artifacts caused by frequently used metallic dental materials and to compare the influence of different MRI sequences on artifacts.MethodsA total of 22 kinds and 25 metallic dental samples were tested with 1.5 T MR imager and gradient-echo sequence. Spin-echo and fast spin-echo were added to parts of these samples. Results Of all the 25 metallic dental samples, 11 including gold, amalgam, and silver point did not produce artifact. Titanium alloy and porcelain product fused in metal had mild artifacts. Whereas the remaining 12 samples such as the retention pin and pivot pin showed severe artifacts. Artifacts produced by retention pin, nickel chromium crown and so on were less severe on fast spin-echo. ConclusionsAttention should be paid to some of the metallic dental materials, which could cause severe MR artifacts and image degradation, when undergoing face,jaw and head MR examination. Artifacts can be alleviated by using proper metallic materials or choosing proper imaging sequence and parameters.
