<div dir="ltr"><div>Dear RTK users,<br>
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<div><span><a href="http:///" target="_blank"><span id="m_7836846548026165834goog_1289246637"></span></a><a href="https://github.com/SimonRit/RTK/archive/v1.4.0.zip">RTK v1.4.0</a> has just been <span><span class="m_7836846548026165834gmail-il">released</span></span>,
about 17 months after RTK v1.3.0. This should be the last release before a more significant RTK re-factoring to become an ITK external module (see <a href="https://github.com/SimonRit/RTK/tree/RTK-ExternalModule">RTK-ExternalModule GitHub branch</a>).<br>
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<span class="m_7836846548026165834gmail-il">Release</span> notes:</div></div></div></div></div></div></div></div></div></div><div>* Many SimpleRTK improvements, including a large update based on SimpleITK 0.10.0<br>* Continuous integration: improved TravisCI, added CircleCI and AppVeyorCI<br>* Added ITK style git hooks.<br>* Improvement of geometric phantoms, added Forbild capability<br>* Geometry for Bioscan NanoSPECT/CT<br>* Better description of geometry, with doxygen drawings<br>
* Parallel geometry for rtk::<wbr>JosephForwardProjectionImageFi<wbr>lter<br><div class="m_7836846548026165834gmail-m_3488594052243581790gmail-yj6qo m_7836846548026165834gmail-m_3488594052243581790gmail-ajU"><div id="m_7836846548026165834gmail-m_3488594052243581790gmail-:g5i" class="m_7836846548026165834gmail-m_3488594052243581790gmail-ajR"><img class="m_7836846548026165834gmail-m_3488594052243581790gmail-ajT" src="https://ssl.gstatic.com/ui/v1/icons/mail/images/cleardot.gif">* Support for cylindrical detectors:<br></div></div>
- limited to iterative<br>
- not using displaced detectors<br>
- ray based projectors can handle any radius<br>
- voxel-based back projectors (CPU and CUDA) can only handle source-centered cylindrical detectors<br>
* Several methods for spectral CT reconstruction:<br>
- forward model<br>
- material decomposition of projections<br>
- aberrant pixels removal<br>
- regularized multi-channel reconstruction (nuclear TV regularization)<br>
* Geometry options for jaw collimation<br>
* Ray-based iterators to seamlessly handle all rays of a stack of projections<br>* Updates on Varian Xim geometry reading and projections processing<br></div>* Updates on medPhoton Ora reading and projections processing<br><div>
* Varian HNC reader<br>
* Method to generate an RTK geometry from calibration matrices<br><br>Many thanks to all contributors<span>, in
alphabetical order for this <span class="gmail-il">release</span></span>: Ali Uneri, Andreas Gravgaard Andersen, Bernhard Froehler, Brent van der Heyden, Cyril Mory, David Kügler, Fabien Momey, Hans Johnson, Jerome Lesaint, Julien Jomier, Kiran Joshi, Lotte Schyns, Lucas Gandel, Sébastien Brousmiche, Simon Rit, Thibault Notargiacomo and Thomas Baudier.<br><br>As usual, be aware that we don't focus on <span>releases</span> since
we have a <a href="http://github.com/SimonRit/RTK" target="_blank">public github repository</a> that we try
to keep stable. I still recommend the use <span class="gmail-il">of</span> the master
HEAD over <span>releases</span> to enjoy the
new <span class="gmail-il">RTK</span> developments before their <span><span class="gmail-il">release</span></span>.
We still have a few on-going projects for which we will
use and enhance <span class="gmail-il">RTK</span>.<br><br>
Simon (for the <span class="gmail-il">RTK</span> consortium)<br></div></div>