Comparison of MRI artifacts caused by Ni-Cr alloy fixed prostheses on different field-strength magnets
- VernacularTitle:不同磁场强度下镍铬合金固定修复体MRI伪影的比较
- Author:
chen-ying, SHAO
;
li-ying, YU
;
chun, XIE
;
jiang, LIN
- Publication Type:Journal Article
- Keywords:
artifact;
MRI;
field strength;
Ni-Cr alloy;
prosthesis
- From:Journal of Shanghai Jiaotong University(Medical Science)
2006;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the influence of different field-strength magnets(1.5 T and 3.0 T)on MRI artifacts caused by Ni-Cr alloy fixed prostheses.Methods The crown,bridge and upper denture fixed prostheses with different thickness were produced by Ni-Cr alloy as test samples,and were one by one put on the centre of water phantom for MR scanning with different field-strength magnets(1.5 T and 3.0 T).The artifact areas on these two field-strength magnets were measured and statistically compared.The plastic prostheses with the same shape and thickness as the test samples were served as controls.Results Ni-Cr alloy fixed prostheses could cause MRI artifacts,and the artifact areas increased with the mass of prostheses.However,no artifact area was found in controls.Compared with those on 1.5 T magnet,the MRI artifact areas significantly increased on 3.0 T magnet(P
