Measurement Layers (Overlays)

OsiriX and Horos Course · MPR and Centerline

In this video I show a simple and very useful tip in OsiriX: besides the traditional rulers and measurements, you can build a publication-ready image using annotation layers (overlays). The idea is to import/use PNG images with a transparent background (for example, an arrow) and position them over the axial slice. This way, you can: insert arrows, icons or markers anywhere in the image, adjust size and position freely, choose images of any color/style, and save/export the image with these annotations already in place, ready for a class, article or report. Practical tip: PNG is better than JPEG for this purpose because it allows a transparent background, leaving the marker "floating" over the image without a white square behind it.