forgot the other places where ConvertImage was used, fixed
forgot the other places where ConvertImage was used, fixed

NicolasSchnitzler/medInria-public,aabadie/medInria-public,rdebroiz/medInria-public,aabadie/medInria-public,NicolasSchnitzler/medInria-public,NicolasSchnitzler/medInria-public,rdebroiz/medInria-public,aabadie/medInria-public,rdebroiz/medInria-public