TITLE:
Connections between the Specific Absorption Rate and the Local Temperature
AUTHORS:
Oliver Szasz, Gyula Szigeti, Andras Szasz
KEYWORDS:
Thermal, Non-Thermal, Athermal, SAR, Non-Equilibrium, Dissipation, Hysteresis
JOURNAL NAME:
Open Journal of Biophysics,
Vol.6 No.3,
June
30,
2016
ABSTRACT: The specific
absorption rate (SAR) characterises the energy intake from outside energy
sources. Dominantly, the dosing of electromagnetic radiation uses the SAR,
defining the absorbed power in unit mass, measured in W/kg. Ionisation
radiation creates a certain distortion in the DNA, which is the goal of
radiation in oncology. The dose in this case counts the time duration of the
actual SAR, and uses the absorbed energy instead of the absorbed power,
measured by Gy (=J/kg). The ionising rate is the desired result, and the
developed temperature is only an unwanted side effect. In the case of
non-ionising radiation, the same characterisation is used for completely
opposite goals. There, the direct interest
is the temperature increase, and the excitation processes other than temperature
increasing energy consumptions are neglected. Our objective in this work is to
clarify the connections of SAR and developed
temperature, and discussing the actual debates about non-ther-mal
energy absorption.