Thresholds for perceiving metallic taste at high magnetic field
Thresholds for perceiving metallic taste at high magnetic field
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DOI：
10.1002/jmri.21153
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发表时间：
2007-11-01
影响因子：
4.4
通讯作者：
Gowland, Penny A.
中科院分区：
文献类型：
--
作者：
Cavin, Ian D.;Glover, Paul M.;Gowland, Penny A.
目的：进行初步表征的金属味的影响，观察到一些工人移动时，周围的MRI scanner.Materials和方法：共有21名受试者进行控制的运动中的杂散场的7-T扫描仪。磁通量的变化率记录在研究过程中使用一个定制的三轴线圈单元连接到一个data logger.Results：相对正常的运动可以产生2 T/秒的切换字段。在21名受试者中，有12名检测到金属味，但受试者之间感知金属味的阈值差异很大，检测到这种味道的最小dB/dt值为1.3 T/秒。阈值也取决于运动的方向。结论：这项研究表明，50%的受试者将感知到金属味的头部晃动的时间为1.5秒（磁场在前/后方向）造成的dB/dt为2.3 +/- 0.3 T/秒。牙齿填充物的存在不是金属味道感觉的要求。
Purpose: To perform an initial characterization of the metallic taste effect observed by some workers when moving around an MRI scanner.Materials and Methods: A total of 21 subjects performed controlled movements in the stray field of a 7-T scanner. Rates of change of magnetic flux were recorded during the study using a custom-built three-axis coil unit connected to a data logger.Results: Relatively normal movements could generate switched fields of 2 T/second. Of the 21 subjects, 12 detected, a metallic taste, but the threshold at which it was perceived varied greatly between subjects, with the minimum dB/dt value at which such a taste was detected being 1.3 T/second. The threshold also depended on the direction of movement.Conclusion: This study indicates that 50% of subjects will perceive a metallic taste for head shaking with a period of 1.5 seconds (magnetic field in an anterior/posterior direction) causing a dB/dt of 2.3 +/- 0.3 T/second. The presence of dental fillings is not a requirement for the sensation of metallic taste.