We　developed　ECT　systems　using　high-sensitivity　magnetic　sensors　with　small　size;　and　used　the　systems　to　evaluate　a　titanium　alloy　sample　prepared　by　a　3D　laser　printer.　The　magnetic　sensor　was　constructed　using　an　amorphous　wire　with　the　diameter　of　0.1　mm　and　the　length　of　5　mm.　The　magnetic　field　resolution　was　about　30　pT/√Hz.　For　the　ECT　system,　a　small　excitation　coil　was　also　wrapped　around　the　amorphous　wire,　and　the　excitation　frequency　was　chosen　to　be　100　kHz.　The　image　of　the　scanning　result　shows　that　the　ECT　method　was　able　to　detect　the　positions　of　flaws　in　the　test　sample.　We　also　compared　the　results　with　that　of　traditional　ECT　system　with　inductive　coil　probe.　©　2019　The　authors　and　IOS　Press.　All　rights　reserved.