In 3 central lung cancer patients the received data of Bioplasm machine with spectral-entropic analysis provided precise detection of space-occupying lesion. The following factor drew attention: detection accuracy of pathological foci at Bioplasm machine research, as a rule, exceeded the values received at PET procedure. Important advantage of Bioplasm machine method is the absence of a signal from heart which may “conceal” tumoral formations at PET.