  Supernova Remnants (SNRs) exhibit spectra featured by synchrotron radio
emission arising from the relativistic electrons, and high-energy emission from
both leptonic (Bremsstrahlung and Inverse Compton) and hadronic processes
(${\pi}^0$ mesons decay) which are a direct signature of cosmic rays
acceleration. Thanks to radio single-dish imaging observations obtained in
three frequency bands (1.6, 7, 22 GHz) with the Sardinia Radio Telescope
(www.srt.inaf.it), we can model different SNR regions separately. Indeed, in
order to disentangle interesting and peculiar hadron contributions in the
high-energy spectra (gamma-ray band) and better constrain SNRs as cosmic rays
emitters, it is crucial to fully constrain lepton contributions first through
radio-observed parameters. In particular, the Bremsstrahlung and Inverse
Compton bumps observed in gamma-rays are bounded to synchrotron spectral slope
and cut-off in the radio domain. Since these parameters vary for different SNR
regions and electron populations, spatially-resolved radio spectra are then
required for accurate multi-wavelength modelling.
