<div dir="ltr"><div><div><div><div><div><div>Hi,<br></div>Yes, I confirm. You should be able to check with simple voxelized geometries. This is not specific to FFDA, see<br><a href="http://wiki.opengatecollaboration.org/index.php/Users_Guide_V7.2:Voxelized_Source_and_Phantom#Example_of_voxelized_phantom_description_macro">http://wiki.opengatecollaboration.org/index.php/Users_Guide_V7.2:Voxelized_Source_and_Phantom#Example_of_voxelized_phantom_description_macro<br></a>You can manually edit this file to create another range of values with another material, e.g., append<br></div>2210 5000 G4_Ti<br></div>Database is here: <a href="http://geant4.cern.ch/UserDocumentation/UsersGuides/ForApplicationDeveloper/BackupVersions/V9.3/html/apas09.html">http://geant4.cern.ch/UserDocumentation/UsersGuides/ForApplicationDeveloper/BackupVersions/V9.3/html/apas09.html</a><br></div>You can also use materials in the Gate material database (see Gate wiki for more info).<br></div>Best regards,<br></div>Simon<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 13, 2017 at 4:52 PM, Shiras Abdurahman <span dir="ltr"><<a href="mailto:shiraska@gmail.com" target="_blank">shiraska@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div><br></div><div>I am using FFDA for CT projection simulation from voxelized phantoms. I utilize ICRP_HUmaterials.db <wbr>for material description and a separate text file called cylinder.mat to map HU to material (/gate/patient/geometry/<wbr>setHUToMaterialFile). The content of the text file is given below:</div><div><div>-10 10 Vacuum</div><div>10 1010 G4_WATER </div><div>1010 2210 G4_BONE_COMPACT_ICRU </div></div><div>For a volume which contains air, water, and bone, I set the corresponding voxels with HU values 0, 1000 and 2000. Could you please confirm whether these values are correct? I would also like to add objects which represent Titanium implants. So what should I do in this regard?</div><div><br></div><div>With regards,</div><div>Shiras</div><div><br></div></div>
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