I agree with Christine and I have only had Echos. I asked my onco about it recently since it seems alot of folks on this site get mugas (and Sloan - my occassional second opinion Dr - uses muga).
Muga is more accurate (according to my onco) but it does use radiation. However, it is a completely objective test with an exact score. An echo is read and interpreted by a doctor and has a subjective side to it. This is why the LVEF is given in a range (as Christine wrote "60-65"). Therefore, my onco said that if it was an older or sick person, he would do a muga so he could make the best opinion on therapy for that person but in general, an echo is sufficient.
Hope this helps
Becky
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