Liver questions

Has anyone had their onc. say that the liver tumors may be dieing but not shrinking? My ct scan showed two nodules slightly larger and two slightly smaller. The lumpy bumpys in my belly had melted away. So, I am just wondering if my Dr. is giving me lipservice or if this is what he really thinks. He said that in the beginning my tumors had a good bit of necrosis in the center and that it turns to liquid and expands making the tumors appear larger on scan. He wants me to do a pet scan after treatment 7 to see if it is lit up the same or has faded. Anyone been told this before and if so was it true? God Bless, Patti