Table 2.

Polynomial coefficients.

$f\left(x\right)$; $x=\text{kVp}$	$a{x}^2$	$bx$	c
Output (mR/mAs @ 1 m)	$4.95\times {10}^{-4}\pm 20.2\%$	$7.90\times {10}^{-2}\pm 23.2\%$	$-2.86\pm 27.6\%$
Tissue HVL $\left(15\times 15\text{\hspace{0.5em}cm}\right)$	$-2.22\times {10}^{-4}$	$6.29\times {10}^{-2}$	$6.24\times {10}^{-1}$
Tissue HVL $\left(35\times 35\text{\hspace{0.5em}cm}\right)$	$1.83\times {10}^{-4}$	$6.50\times {10}^{-2}$	$6.76\times {10}^{-1}$