Systems and methods for imaging a body cavity and for guiding a treatment element within a body cavity are provided. A system may include an imaging subsystem having an imaging device and an image processor that gather image data for the body cavity. A mapping subsystem may be provided, including a mapping...http://www.google.com/patents/US20030093067?utm_source=gb-gplus-sharePatent US20030093067 - Systems and methods for guiding catheters using registered images
