interpolation routine as described at http://www.ajdesigner.com/phpinterpolation/bilinear_interpolation_equation.php
interpolation routine as described at
http://www.ajdesigner.com/phpinterpolation/bilinear_interpolation_equation.php
GarmanGroup/RADDOSE-3D,GarmanGroup/RADDOSE-3D,GarmanGroup/RADDOSE-3D,GarmanGroup/RADDOSE-3D