This　article　presents　a　multipath　Lamb　wave　imaging　method　that　leverages　the　extra　reflections　present　in　the　recorded　ultrasonic　waveforms　for　structural　prognosis.　Under　the　ray　acoustic　approximation,　an　edge　behaves　like　a　mirror,　which　changes　the　propagation　path　of　a　wave　and　provides　more　views　of　the　damage　than　can　be　obtained　from　direct　scattering.　To　accommodate　for　these　extra　reflections,　the　scattering　path　of　each　wave　in　the　residual　signal　is　simplified　as　a　direct　scattering　path　from　an　actual　or　virtual　transmitter　(created　by　edge　mirroring)　to　the　damage,　and　then　back　to　an　actual　or　virtual　receiver　(created　by　edge　mirroring).　On　this　basis,　the　Gaussian　distribution　function　is　introduced　to　quantify　the　probabilities　at　each　spatial　node　in　relation　to　all　possible　damage　loci.　Through　fusing　the　images　obtained　from　all　individual　wave　packets,　the　structure　could　be　inspected　with　far　fewer　transducers　compared　to　conventional　elliptical　imaging.　Experimental　results　from　carbon　fiber-reinforced　polymer　laminates　and　aluminum　plate　are　provided　to　illustrate　the　effectiveness　of　the　imaging　method,　where　damage　is　correctly　detected　and　accurately　localized　even　with　a　single　transmitter-receiver　pair.