  Tanihata {\it et al.} determined matter radii $r_{m}(\sigma_{\rm I})$ for
$^{4,6,8}$He from interaction cross sections $\sigma_{\rm I}$ of
$^{4,6,8}$He+$^{12}$C scattering at 790 MeV per nucleon, using the optical
limit of the Glauber model. Lu {\it et al.} determined proton radii $r_{p}({\rm
AIS})$ for $^{4,6,8}$He with the atomic isotope shifts (AIS). We investigate
whether the Love-Franey $t$-matrix folding model is good for
$^{4,6,8}$He+$^{12}$C scattering at 790 MeV per nucleon.
