Fig. 4.

Gamma and beta probe counts versus tumor size. A comparison between intraoperative counts obtained by the probes and the respective tumor sizes. This count is directly proportional to the degree of isotopic radiation emitted by the tissue being measured. As described, this number is easily calibrated to TBR after dividing it by the background’s value. A direct correlation was seen, confirming the higher uptake detected on the larger sized tumors. Calculated R² resulted in 0.48 and 0.43 for gamma and beta probes, respectively