Muon bremsstrahlung photons converted in front of the DELPHI main tracker (TPC) in dimuon events at LEP1 were studied in two photon kinematic ranges: 0.2{Egamma .le. 1 GeV and transverse momentum with respect to the parent muon pT { 40 MeV/c, and 1{Egamma .le. 10 GeV and pT { 80 MeV/c.