an></a></p>
<p>In the folder <code class="docutils literal notranslate"><span class="pre">reference</span></code>, create the folder <code class="docutils literal notranslate"><span class="pre">longitudinal</span></code>, and for each image copy:</p>
<ul class="simple">
<li><p>The baseline image: <code class="docutils literal notranslate"><span class="pre">BL_prep.mha</span></code></p></li>
<li><p>The baseline femur mask: <code class="docutils literal notranslate"><span class="pre">BL_prep_f.mha</span></cod