Piezoelectric　transducer　arrays　are　utilized　in　Structural　Health　Monitoring　systems　as　a　means　for　excitation　and　sensing　of　elastic　waves.　Anomalies　of　propagating　waves　have　enabled　to　develop　damage　detection　algorithms.　Depending　on　actuation-sensing　strategies　these　algorithms　can　be　classified　as　pitch-catch　and　pulse-echo.　Despite　many　signal　processing　methods　such　as　delay-sum,　time-reversal,　probability-based　diagnostic　imaging,　etc.　the　spatial　damage　information　provided　by　the　actuator-sensor　paths　to　reconstruct　the　damage　image　is　limited.　A　novel　strategy　based　on　Lamb　wave　focusing　is　proposed　in　order　to　increase　damage　imaging　resolution.　In　the　proposed　method　all　actuators　are　used　at　the　same　time　exciting　specially　designed　waveforms　so　that　inspect　one　specific　point　of　the　structure.　Damage　map　is　created　by　applying　appropriate　signal　processing.　It　uses　dispersion　curve　of　selected　Lamb　wave　mode　for　dispersion　compensation.　The　dispersion　curve　is　acquired　by　using　laser　scanning　Doppler　vibrometer.　The　damage　indicator　is　calculated　based　on　the　energy　of　compensated　signals　registered　by　sensors.　It　is　shown　that　apart　from　high　energy　level　at　excitation　point,　energy　is　concentrated　exactly　in　the　damaged　region.　An　example　of　crack　detection　and　visualization　in　an　aluminum　plate　is　shown　confirming　the　accuracy　of　the　proposed　method.　Also　the　proposed　method　is　compared　to　well-established　delay-and-sum　algorithm.　(C)　2018　The　Authors.　Published　by　Elsevier　Ltd.