Heart Valve Prostheses and Annuloplasty Rings Many heart valve prostheses and annuloplasty rings have been evaluated for MR safety, especially with regard to the presence of magnetic field interactions associated with exposure to MR systems operating at field strengths of as high as 3-Tesla.2.35-Tesla.
Imaging in Breast Implant Rupture In the early 20th century, many cosmetic breast prosthetic techniques and materials were used for implants; these included polyvinyl alcohol prostheses, paraffin injections, and injections of free silicone. All of these techniques and materials had notable drawbacks and for the most part were abandoned.