-my $RS_NDet = FilterToNumber($in{'RS_NDet'});
-my $RS_NRot = FilterToNumber($in{'RS_NRot'});
-my $RS_NRay = FilterToNumber($in{'RS_NRay'});
-my $RS_RotAngle = FilterToNumber($in{'RS_RotAngle'});
-$error .= "Raysum NDet must be between 5 and 1800<br>" if ($RS_NDet < 5 || $RS_NDet > 1800);
-$error .= "Raysum NRot must be between 5 and 2048<br>" if ($RS_NRot < 5 || $RS_NRot > 2048);
-$error .= "Raysum RotAngle must be between 0.1 and 2<br>" if ($RS_RotAngle < 0.1 || $RS_RotAngle > 2);
+my $PJ_NDet = FilterToNumber($in{'PJ_NDet'});
+my $PJ_NRot = FilterToNumber($in{'PJ_NRot'});
+my $PJ_NRay = FilterToNumber($in{'PJ_NRay'});
+my $PJ_RotAngle = FilterToNumber($in{'PJ_RotAngle'});
+$error .= "Projection NDet must be between 5 and 1800<br>" if ($PJ_NDet < 5 || $PJ_NDet > 1800);
+$error .= "Projection NRot must be between 5 and 2048<br>" if ($PJ_NRot < 5 || $PJ_NRot > 2048);
+$error .= "Projection RotAngle must be between 0.1 and 2<br>" if ($PJ_RotAngle < 0.1 || $PJ_RotAngle > 2);