Three possible methods for inserting volumetric ROIs
["LabelROIs"] - This is a straightforward but logistically cumbersome way of placing volumetric ROIs in ["tkmedit"].
["SegmentationROIs"] - A more useful method within ["tkmedit"] for those interested in repeatedly placing multiple ROIs in a particular volume.
["LineWriterHelperROIs"] - A newer dev ["tkmedit"] tool that allows for sequentially numbered ROIs with a customizable stem. A drawback is these ROIs are only linear, with a one-voxel line width.