Abstract
Recently, magnetic attachments for implants have been reported to be useful. However, keepers of magnetic attachments have produced metal artifacts on magnetic resonance (MR) imaging in the head and neck regions. The purpose of this study was to evaluate metal artifacts on MR imaging using Magnetic Attachments of a Cap Shape (MACS) removable keepers, in a phantom study and in clinical cases.
The following results were obtained:
1. In the phantom study, the dimensions of metal artifacts were 11.3 centimeters with a keeper,and almost none without a keeper.
2. In clinical case, diagnostic imaging in the head and neck regions was impossible with keepers, and possible without keepers. These results suggested that MACS is useful for MR imaging in the oral region, because it has a removable keeper.
