Based　on　a　guided　wave　technique　and　a　dispersive　waveform　prediction　method,　this　paper　presents　a　method　which　can　be　used　to　image　defects　in　pipes.　According　to　this　method,　a　non-axis　symmetrical　end　loading　transducer　can　be　used　to　excite　an　L　(0,　2)　mode　and　receive　its　echo　at　one　end　of　the　pipe.　By　rotating　the　said　transducer　with　a　specific　space　in　the　circumferential　direction　of　said　end　and　then　operating　the　said　transducer,　twenty-four　received　signals　can　be　obtained　so　as　to　image　and　locate　those　defects.　Finally,　we　concluded　that　it　is　effective　to　image　and　recognize　defects　in　two　kinds　of　pipes　including　a　one-holed　pipe　and　a　two-partially-circumferential-notched　pipe　using　the　presented　method.　Copyright　©　2006　by　ASME.