A system for monitoring, directing and controlling the dose of radiation in a medical procedure for irradiating a specific region of a patient's body. In its generic form, the system includes at least one sensor being implantable within, or in proximity to, the specific region of the patient's body,...http://www.google.com/patents/US6431175?utm_source=gb-gplus-sharePatent US6431175 - System and method for directing and monitoring radiation
System and method for directing and monitoring radiation