<html><head></head><body><div style="color:#000; background-color:#fff; font-family:標楷體, dfkai-sb;font-size:16px"> Dear RTK users and developers<div id="yui_3_16_0_ym19_1_1500189221235_25566" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">I am new to RTK. I have some trouble getting a proper reconstruction. I want to use EPID mounted on Elekta linear accelerator to get MV-CBCT images. I have 120 projection images (in his format) scanned over (0-357) degree of the phantom. The phantom is containing 5 rods of different materials (titanium, aluminum, acrylic, air and polyethylene). The measurement geometry is as bellow;</div><div id="yui_3_16_0_ym19_1_1500189221235_25567" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">- detector size= 1024*1024 pixels</div><div id="yui_3_16_0_ym19_1_1500189221235_25568" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">- size of each pixel=0.4mm</div><div id="yui_3_16_0_ym19_1_1500189221235_25569" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">-size of each pixel at the isocenter=0.25mm</div><div id="yui_3_16_0_ym19_1_1500189221235_25570" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">-source-to-detector distance=157cm</div><div id="yui_3_16_0_ym19_1_1500189221235_25571" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">-source-to-isocenter distance=100cm</div><div id="yui_3_16_0_ym19_1_1500189221235_25572" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">I used the rtkfdk as bellow;</div><div id="yui_3_16_0_ym19_1_1500189221235_25573" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">[sn@localhost workspace]$ rtkelektasynergygeometry --image_db MyIMAGE1.DBF --frame_db MyFRAME1.DBF --dicom_uid 1 -o</div><div id="yui_3_16_0_ym19_1_1500189221235_25574" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">elektaGeometry</div><div id="yui_3_16_0_ym19_1_1500189221235_25575" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">[sn@localhost workspace]$ rtkfdk --lowmem --geometry elektaGeometry --path img_1/ --regexp '.*.his' --output slice50.0.mha --verbose<br id="yui_3_16_0_ym19_1_1500189221235_25576">--spacing 0.25,0.25,0.25 --dimension 1024,1,1024 --origin -127.875,50,-127.875.</div><div id="yui_3_16_0_ym19_1_1500189221235_25577" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">I display .mha images with VV , it just show the central rod (air) and doesn't show the others ( although the projections are megavoltage, I get result from some other open-source software for CBCT). I attached the geometry file (frame and image.DBF) with the mail. I need your help to know what went wrong. </div><div id="yui_3_16_0_ym19_1_1500189221235_25578" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr"><span id="yui_3_16_0_ym19_1_1500189221235_25579" style="line-height:16px;">I really appreciate any help you can provide.</span></div><div id="yui_3_16_0_ym19_1_1500189221235_25580" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr"><br id="yui_3_16_0_ym19_1_1500189221235_25581"></div><div id="yui_3_16_0_ym19_1_1500189221235_25582" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">best regards.</div><div id="yiv3951132571yui_3_16_0_ym19_1_1500142672340_3650" style="color:#000;background-color:#fff;font-family:標楷體, dfkai-sb;font-size:16px;" dir="ltr">fateme.</div></div></body></html>