In　order　to　quantify　residual　strains　in　aortic　arch,　curve　length　method　and　corresponding　computerized　measurement　of　vessel　images　are　presented.　White　rabbits　were　taken　as　an　example　in　the　experiment.　And　cross-sectional　configuration　parameters　of　aortic　arch,　such　as　semimajor/semi-minor　axis,　wall　thickness　of　arterial　wall　in　the　non-loaded　state,　and　inner/outer　curve　length,　wall　thickness　of　arterial　wall　in　the　zero-stress　state,　were　measured.　Subsequently　circumferential　residual　strains　of　aortic　arch　in　the　zero-stress　state　were　calculated.　As　results　of　the　experiment　and　calculation,　axial　distribution　of　residual　strains　in　inner　or　outer　walls　along　aortic　arch　is　consistent　well　with　the　opening　angle　distribution,　in　which　the　variation　magnitude　is　much　smaller　in　the　straight　section　than　in　the　curved　section.　Simultaneously,　not　only　the　opening　angle　but　also　residual　strains　aren＇t　the　function　of　circumferential　coordinate　θ,　which　means　that　circumferential　distributions　of　the　opening　angle　and　residual　strains　are　uniform.　Furthermore,　radial　distribution　of　circumferential　residual　strains　is　nonlinear,　and　the　radial　gradient　minimizes　at　the　arch　of　aorta　approximately.　©　2010　IEEE.