+Geometry:<br>
+<INPUT type="radio" name="geometry" value="parallel" checked>Parallel<br>
+<INPUT type="radio" name="geometry" value="equiangular">Equiangular<br>
+<INPUT type="radio" name="geometry" value="collinear">Collinear<br>
+<p>
+Number of Detectors: <input type="text" name="PJ_NDet" size="4" value="367"><p>