<div>Hello all,<br></div><div><br></div><div>I'm one newbie for ITK/RTK. I have some programming experience, but for image processing is totally new for me. <br></div><div><br></div><div>I have 3 basic questions:<br></div><div><br></div><div>1. when I run example for reconstructing Elekta CBCT sequence from <a href="https://wiki.openrtk.org/index.php/RTK/Examples/ElektaReconstruction">https://wiki.openrtk.org/index.php/RTK/Examples/ElektaReconstruction</a>.<br></div><p style="margin: 0.5em 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="background-color:rgb(255, 255, 255)"><span style="font-family:sans-serif"><span style="font-size:14px"><span style="color:rgb(108, 166, 217)">. Reconstruct elekta-data using RTK applications such as rtkfdk algorithm. In this case, we reconstruct just one axial slice (29.5) of the whole volume:</span></span></span></span><span style="color:rgb(108, 166, 217)"><br></span></p><pre style="font-family: monospace, monospace; color: rgb(0, 0, 0); background-color: rgb(248, 249, 250); border: 1px solid rgb(234, 236, 240); padding: 1em; white-space: pre-wrap; line-height: 1.3; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color:rgb(108, 166, 217)"> rtkfdk \
--lowmem \
--geometry elektaGeometry \
--path img_1.3.46.423632.135428.1351013645.166/ \
--regexp '.*.his' \
--output slice29.5.mha \
--verbose \
--spacing 0.25,0.25,0.25 \
--dimension 1024,1,1024 \
--origin -127.875,29.5,-127.875</span> <br></pre><div class="protonmail_signature_block"><div class="protonmail_signature_block-user protonmail_signature_block-empty"><br></div><div class="protonmail_signature_block-proton">In this step, only one <span style="background-color:rgb(255, 255, 255)"><span style="font-family:sans-serif"><span style="font-size:14px"><span style="color:rgb(34, 34, 34)">axial slice is reconstructed to *.mha file. My question is that can I reconstruct all slices as one 3D image file?</span></span></span></span><br></div><div class="protonmail_signature_block-proton"><br></div><div><span style="background-color:rgb(255, 255, 255)"><span style="font-family:sans-serif"><span style="font-size:14px"><span style="color:rgb(34, 34, 34)">2. I have two kV-kV images, they are orthogonal. Can I use RTK to reconstruct 3D image? If yes, one guideline or example is welcome.</span></span></span></span><br></div><div><br></div><div><span style="background-color:rgb(255, 255, 255)"><span style="font-family:sans-serif"><span style="font-size:14px"><span style="color:rgb(34, 34, 34)">3. Could someone please share me some free test dataset for radiotherapy CBCT IGRT purpose including PlanCT and CBCT sequence? I want to use these data for reconstruction and registration with ITK and RTK?</span></span></span></span><br></div><div><br></div><div>Much appreciated for responses.</div><div><br></div><div>George Woods</div><div class="protonmail_signature_block-proton"><br></div><div class="protonmail_signature_block-proton">Sent with <a href="https://protonmail.com" target="_blank">ProtonMail</a> Secure Email.<br></div></div><div><br></div><div><br></div>