<qa>  How many 2D images will be available for the middle two studies?The first and last echocardiogram will be complete studies with strain calculation and 3D volumes. The middle two studies after receiving at least a cumulative 240mgm2 of doxorubicin and at 6 months after the start of treatment will be limited studies consisting of seven 2D images PLAX, APLAX, 4CH, 2CH, SAX-base, SAX-mid, SAX-apex with strain calculation. 