THE PURPOSE: The purpose of this research consisted in monitoring of brightness 
temperature of the suspension of follicular thyroid carcinoma cells during the 
necrosis of these cells in superhigh frequency (SHF) range.
METHODS: The monitoring of the change in the ratio between brightness 
temperatures TSHF and TIR values during the necrosis of these cells. The object 
of study was follicular thyroid carcinoma cells suspension prepared with use of 
Versene solution and 0.25% trypsin solution. The cells were precipitated by 
centrifugation and re-suspended in culture medium. The measurements of 
brightness temperatures were carried out with use of radiothermoimeter. SHF 
range was 3.4-4.2 GHz, and infrared (IR) range was 8-13 mm. The temperature of 
the suspension was maintained at 37.5°С.
RESULTS: It was found that upon the necrosis in the suspension of cells, an 
increase in brightness temperature in 3.4-4.2 GHz range (SHF range) occurs, 
while brightness temperature of the medium in the IR range does not change.
CONCLUSION: The monitoring of necrosis of follicular thyroid carcinoma cells was 
carried out by SHF-radiothermometry. It was shown that during the necrosis the 
change of non-equilibrium state of cell medium occurs, that results in the 
change in the ratio between TSHF and TIR. During the necrosis, the brightness 
temperature in SHF range (TSHF) increases.