<input type="radio" name="IR_Backproj" value="table">Trig Table<br>
<input type="radio" name="IR_Backproj" value="diff">Difference<br>
<input type="radio" name="IR_Backproj" value="diff2">Difference Optimized<br>
-<input type="radio" name="IR_Backproj" value="idiff2" checked>Difference Optimized (integer math)<br>
+<input type="radio" name="IR_Backproj" value="idiff2">Difference Optimized (integer math)<br>
+<input type="radio" name="IR_Backproj" value="idiff3" checked>Difference Highly-optimized (integer math)<br>
</td></tr></table>
<p>
<input type="submit" value="Simulate"><input type="reset" value="clear fields">