<div dir="ltr"><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small"><br>Dear Gaters,<br>I have a problem.<br>I want to simulate the sensitivity of the PET. I am using the NEMA NU 2-2007.<br>I use a source F-18 inside five cylinders. Therefore, I have it, the following: <br>--------<br>PHANTOM:<br>--------<br><br>#    CYLINDER 5<br>/gate/world/daughters/name                   phantom5<br>/gate/world/daughters/insert                 cylinder<br>/gate/phantom5/setMaterial                   Air<br>/gate/phantom5/vis/setColor                  grey<br>/gate/phantom5/geometry/setRmax              0.955 cm<br>/gate/phantom5/geometry/setRmin              0.83 cm<br>/gate/phantom5/geometry/setHeight            70 cm<br>/gate/phantom5/placement/setTranslation      0 0 0 mm<br><br>/gate/phantom5/attachPhantomSD<br><br>#    CYLINDER 4<br>/gate/phantom5/daughters/name                 phantom4<br>/gate/phantom5/daughters/insert               cylinder<br>/gate/phantom4/setMaterial                    Air<br>/gate/phantom4/vis/setColor                   blue<br>/gate/phantom4/geometry/setRmax               0.795 cm<br>/gate/phantom4/geometry/setRmin               0.67 cm<br>/gate/phantom4/geometry/setHeight             70 cm<br>/gate/phantom4/placement/setTranslation       0 0 0 mm<br><br>/gate/phantom4/attachPhantomSD<br><br>#    CYLINDER 3<br>/gate/phantom4/daughters/name                 phantom3<br>/gate/phantom4/daughters/insert               cylinder<br>/gate/phantom3/setMaterial                    Air<br>/gate/phantom3/vis/setColor                   yellow<br>/gate/phantom3/geometry/setRmax               0.635 cm<br>/gate/phantom3/geometry/setRmin               0.51 cm<br>/gate/phantom3/geometry/setHeight             70 cm<br>/gate/phantom3/placement/setTranslation       0 0 0 mm<br><br>/gate/phantom3/attachPhantomSD<br><br>#    CYLINDER 2<br>/gate/phantom3/daughters/name                 phantom2<br>/gate/phantom3/daughters/insert               cylinder<br>/gate/phantom2/setMaterial                    Air<br>/gate/phantom2/vis/setColor                   green<br>/gate/phantom2/geometry/setRmax               0.475 cm<br>/gate/phantom2/geometry/setRmin               0.35 cm<br>/gate/phantom2/geometry/setHeight             70 cm<br>/gate/phantom2/placement/setTranslation       0 0 0 mm<br><br>/gate/phantom2/attachPhantomSD<br><br>#    CYLINDER 1<br>/gate/phantom2/daughters/name                 phantom1<br>/gate/phantom2/daughters/insert               cylinder<br>/gate/phantom1/setMaterial                    Air<br>/gate/phantom1/vis/setColor                   red<br>/gate/phantom1/geometry/setRmax               0.32 cm<br>/gate/phantom1/geometry/setRmin               0.195 cm<br>/gate/phantom1/geometry/setHeight             70 cm<br>/gate/phantom1/placement/setTranslation       0 0 0 mm<br><br>/gate/phantom1/attachPhantomSD<br><br>--------<br>SOURCE:<br>--------<br>/gate/source/addSource                     F18CylinderSource<br>/gate/source/F18CylinderSource/setActivity         50. becquerel<br>/gate/source/F18CylinderSource/gps/particle         e+<br>/gate/source/F18CylinderSource/setForcedUnstableFlag     true<br>/gate/source/F18CylinderSource/setForcedHalfLife     6586 s<br>/gate/source/F18CylinderSource/gps/energytype         Fluor18<br>/gate/source/F18CylinderSource/gps/shape        Annulus<br>/gate/source/F18CylinderSource/gps/type         Volume<br>/gate/source/F18CylinderSource/gps/radius0        0.1 cm<br>/gate/source/F18CylinderSource/gps/radius        0.3 cm<br>/gate/source/F18CylinderSource/gps/halfz        35 cm<br><br>/gate/source/F18CylinderSource/gps/angtype         iso<br>/gate/source/F18CylinderSource/gps/mintheta        0. deg<br>/gate/source/F18CylinderSource/gps/maxtheta        180. deg<br>/gate/source/F18CylinderSource/gps/minphi        0. deg<br>/gate/source/F18CylinderSource/gps/maxphi        360. deg<br>/gate/source/F18CylinderSource/gps/centre         0. 0. 0. cm<br>/gate/source/list<br><br><br>According to the photo, emissions occur only in the center of the source. But i think that events should be seen throughout the source continuously and uniformly. Can you do it?<br clear="all"></div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><pre>LORENA VÁZQUEZ CANELAS<br>-- <br>LRI - Datación (Despacho Técnicos)<br>Calle Espejo, s/n, 37008 - Salamanca (Spain)<br>TEL: +34 923 294930 ext:4932 email: <a href="mailto:lorena.vazquez@usal.es" target="_blank">lorena.vazquez@usal.es</a><br>web: <a href="http://campus.usal.es/%7Elri/" target="_blank">http://campus.usal.es/~lri/</a></pre></div></div></div></div></div></div></div></div></div></div>
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