<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Hi Gaters,<br>Sorry for so many questions.<br>I send you this code to find out if it could be well.<br>I'm doing the simulation of image quality according to NEMA says.<br>My big problem is knowing activity values that have to put in the spheres and background to reconstruct the image.<br>As hot lesions i have: 10, 13, 17 and 22 mm spheres, then, their areas respectively will be: 0.523, 1.150, 2.572 and 5.575 cc.<br>According to NEMA NU 2-2007, the hot lesions shall be filled with a concentration of N times that of the background. <br>Therefore, for N = 8, i have: A-sphere = (1/8).A-background = (1/8).5,3 kBq/cc= 0,6625 kBq/cc.<br>For 10mm sphere, i will have: A-sphere = 0,6625 kBq/cc . 0,523cc = 0,346 kBq. <br>Is this correct?? But, the concentration of background??<br><br>Thank you very much in advance!<br><br><br><pre dir="ltr" data-fulltext="" class="tw-data-text vk_txt tw-ta tw-text-small" data-placeholder="Traducción" id="tw-target-text" style="text-align: left; height: 72px;"><br></pre><br><br><pre dir="ltr" data-fulltext="" class="tw-data-text vk_txt tw-ta tw-text-medium" data-placeholder="Traducción" id="tw-target-text" style="text-align: left; height: 72px;"><br></pre><br> </div></body> </html>