The doctors use a handheld gamma ray counter to find which ones absorbed it.
2.
The specimens had earlier been dated at 45, 000 years using a gamma ray counter.
3.
They found that if the gamma ray counter picked up a signal, the procedure was 97 percent accurate at pinpointing all the cancerous nodes.
4.
Using a hand-held gamma ray counter and visual observation of the trail of dye, surgeons can locate the " hot spot " _ the lymph node that is first in line to absorb cancer cells from the tumor.
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