A vaso-occlusive device is introduced in a cavity of a patient's vasculature, such as an aneurysm, after which an external energy source, such as a MRI machine is activated to heat the vaso-occlusive device to assist in forming a thrombus or embolism within the treatment site, to release and/or activate...http://www.google.es/patents/US7789891?utm_source=gb-gplus-sharePatente US7789891 - External activation of vaso-occlusive implants
