Figure 8

Qualitative example of grouping. The carotids in which no ligation was noticeable on computed tomography (CT) and/or clinical ultrasound were grouped into group A. When a narrowing was noticeable on computed tomography (and/or increased peak systolic velocity was measured at the ligation it was categorized as B. When almost complete ligation as observed on computed tomography and/or ultrasound it was categorized as group C.