Merck
CN

Artefacts caused by dental filling materials in MR imaging.

Acta radiologica (Stockholm, Sweden : 1987) (1995-05-01)
B Vikhoff, S Ribbelin, B Köhler, S Ekholm, H Borrman
摘要

An investigation regarding possible artefacts from dental filling materials in MR imaging is presented including 9 types of such materials from various manufacturers. Freshly extracted teeth were prepared and the filling materials were handled according to manufacturers' instructions. The teeth were encapsulated into a gel phantom based on de-ionized water, Ni (NO3)2 and polysaccharide agarose powder. The investigation was performed with a standard head coil and a 1.5 T MR unit. Images acquired with various combinations of parameters from different sequences were visually analysed regarding possible artefacts. The investigation showed that only one of the materials caused significant artefacts. The gel phantom was found to be a valuable means for examination of artefacts from small samples, and can be recommended as a standard technique for this purpose.

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Sigma-Aldrich
硝酸镍(II) 六水合物, 99.999% trace metals basis
Sigma-Aldrich
硝酸镍(II) 六水合物, purum p.a., crystallized, ≥97.0% (KT)
Sigma-Aldrich
硝酸镍(II) 六水合物, crystals
Sigma-Aldrich
硝酸镍(II) 六水合物, puriss. p.a., ≥98.5% (KT)