Given these conflicting results, we tried to ascertain
whether RT truly influences the atherosclerotic process.
To do so, we studied a group of lymphoma patients using
echo-colour Doppler, in two different times, that is, soon
after RT and again 2 years later. We used echo-colour
Doppler for these reasons: (1) it is safe (De Groot 2008); (2)
it is reproducible (De Groot 2008); and (3) it can find the
precocious changes in the artery wall and their modifications
after therapy (Crouse et al. 2007).