Create spherical ROI</td>
<td><code>spherical_roi()</code></td>
</tr>
<tr class="even">
<td>Extract time-series</td>
<td><code>series()</code>, <code>series_roi()</code></td>
</tr>
<tr class="odd">
<td>Smooth image</td>
<td><code>gaussian_blur()</code></td>
</tr>
<tr class="even">
<td>Resample image</td>
<td><code>resample()</code></td>
</tr>
<tr class="odd">
<td>Coordinate conversion</td>
<td><code>coord_to_grid()</code>, <code>grid_to_coord()</code></td>
</tr>
<tr class="even">
<td>Create mask</td>
<td><c