. 2014 Dec 17;10:109–119. doi: 10.2142/biophysics.10.109

Table 1.

Summary of ΔT gradient formulae at various levels of IR laser power

Laser power (W)	ΔT gradient at 25°C (°C)	ΔT gradient at 37°C (°C)
3.09×10⁻¹	−0.668 ln(d/d₀)+4.57	−0.604 ln(d/d₀)+4.13
7.41×10⁻¹	−1.76 ln(d/d₀)+11.6	−1.48 ln(d/d₀)+9.84
1.20	−2.91 ln(d/d₀)+19.2	−2.23 ln(d/d₀)+15.2
1.66	−3.93 ln(d/d₀)+26.0	−2.83 ln(d/d₀)+19.6
2.14	−4.79 ln(d/d₀)+32.1	−3.38 ln(d/d₀)+23.6

Laser power values were those displayed on the controller. Square ROIs (n=51) were set as 5.38 μm×5.38 μm. ΔT gradients were measured three times at 25°C or twice at 37°C. d (in μm) is defined as the distance from the IR laser focal point to the center of the ROI. The unit in the logarithm was cancelled by setting d₀=1 (in μm).