  We calculate the first quantum corrections to the masses of solitons in
imaginary-coupling affine Toda theories using the semi-classical method of
Dashen, Hasslacher and Neveu. The theories divide naturally into those based on
the simply-laced, the twisted and the untwisted non-simply-laced algebras. We
find that the classical relationships between soliton and particle masses found
by Olive {\em et al.\ }persist for the first two classes, but do not appear to
do so naively for the third.
