Figure 2.

Comparison of lumen-oriented and wall-oriented therapies per year. Line shows the five-year average for lumen-oriented (blue) and wall-oriented (red) therapies, and the corresponding shadow shows the number of publications for each strategy per year. For most years, publications of lumen-oriented strategies outnumber wall-oriented strategies. In recent years, wall-oriented strategies became more popular, which is shown by the light-red peaks (i.e., in 2018) and the consistent rise of the red line. Introduction of Guglielmi detachable coils (black arrow) and the first publications (*) for a new treatment concept in a clinical setting, in 1992 (lumen) and in 2013 (wall), respectively.