<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1468998012223_4747"><span id="yui_3_16_0_ym19_1_1468998012223_4851">Hi Barbara,</span></div><div id="yui_3_16_0_ym19_1_1468998012223_4747"><span><br></span></div><div id="yui_3_16_0_ym19_1_1468998012223_4747" dir="ltr">The problem always occurs when you are simulating a pixelated SPECT scanner. At this situation, the projection output is unfortunately buggy. I would suggest using either ASCII or ROOT outputs in order to create the projection images.</div><div id="yui_3_16_0_ym19_1_1468998012223_4747" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1468998012223_4747" dir="ltr">Hope this helps!</div><div></div><div id="yui_3_16_0_ym19_1_1468998012223_4789"> </div><div class="signature" id="yui_3_16_0_ym19_1_1468998012223_4749"><div id="yui_3_16_0_ym19_1_1468998012223_4788"><span style="font-size: small;" id="yui_3_16_0_ym19_1_1468998012223_4828">Hojjat </span></div><div id="yui_3_16_0_ym19_1_1468998012223_4753"><u style="color:rgb(34, 34, 34);font-family:arial, helvetica, sans-serif;font-size:small;background-color:rgb(255, 255, 255);"></u></div></div></div></body></html>