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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><div><div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'>Dear CASToR users,<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'>I’ve generated an attenuation map of the phantom using DICOM images (CT) in MATLAB. I managed to save the linear attenuation coefficients (cm^-1) in interfile (.hdr header and .img data) format. Then, I fed these files in castor reconstruction using ‘-atn atten_map.hdr’ command. But I could not able to perform the attenuation correction correctly. Attached is the screenshot of errors that generated during the reconstruction. Do I have to convert the attenuation map data in castor file format?<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'>Any help will be appreciated. Thank you.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'>Regards,<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#1D2228'>Ashok<o:p></o:p></span></p></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>