A system for detecting a defect or discontinuity in media or at an interface of the media includes a signal generator; a transmission path coupled to the signal generator, wherein the transmission path is arranged along or through the media; a detection circuit for detecting a transmitted and a detected portion of a signal provided by the signal generator; and a circuit for analyzing the reflected portion and identifying a location of a discontinuity or defect in the media. A related method of detecting a defect or discontinuity in media or at an interface between the media includes establishing an electromagnetic energy path along or through the media; coupling electromagnetic energy into the path; detecting a reflected portion of the electromagnetic energy; and analyzing the detected portion so as to determine a position of the defect or discontinuity.