-Filter for Backprojection:<br>
-<input type="radio" name="IR_Filter" value="abs_bandlimit" checked>Abs*Bandlimit<br>
-<input type="radio" name="IR_Filter" value="abs_cos">Abs*Cosine<br>
-<input type="radio" name="IR_Filter" value="abs_hamming">Abs*Hamming<br>
-<input type="radio" name="IR_Filter" value="shepp">Shepp-Logan<br>
-<input type="radio" name="IR_Filter" value="bandlimit">Bandlimit<br>
-<input type="radio" name="IR_Filter" value="hamming">Hamming<br>
-<input type="radio" name="IR_Filter" value="cos">Cosine<br>
-<input type="radio" name="IR_Filter" value="sinc">Sinc<br>
-<input type="radio" name="IR_Filter" value="triangle">Triangle<p>