Fig. 2

Step-by-step description of how signal intensities can be extracted from perfusion-weighted images using OsiriX Light®. First, the respective sequences must be opended using the 4D-Viewer (a). Second, a ROI is drawn around the anatomy of interest (small pink rectangle visible on (b)). Third, one choses from the PlugIn drop-down menu the item ‘ROI enhancement’ (b). Forth, a signal intensity-curve is generated for the ROI (c). The individual signal intensities can then be exported as a CSV file