**5. Time period estimation**

The temperature is elevated in human tissues due to the absorption of power from EM fields. An irreversible damage of the tissue can take place due to the absorption of high power. The dielectric and thermal features of the proposed tissue model are used to evaluate the relationship between the temperature and the point SAR, it could be estimated considering the equation of heat (2) [25].

The SAR value is represented in the left side, so that the thermal distribution in tissues for a period of (Δt) can be determined.

It can rewrite Eq. (4) as:

$$\mathbf{F} = \mathbf{P}/\mathbf{A}.\tag{4}$$

It is worth to mention that the short time period is quite important in the treatment of the diseased tumor cells because of the generated heat does not dissipated to the surrounding healthy tissues, for this reason the calculated time period in this study does not possible unless using the laser either in pule mode or in chopped mode.
