Fig. 4.

SPECT/CT hybrid images where the lymph flow is in blue/yellow. Normal uptake of 99mTc-Nanocoll® by inguinal and iliac lymph nodes on the right. Lack of visualization of left iliac and inguinal lymph nodes (yellow arrow heads in b) and the presence of dermal back flow (white arrows in pictures a, b, and c) to the left flank regions and left hemithorax in a patient with left inguinal lymphodenectomy for Hodgkin’s lymphoma. NB. The red marks are not significant but simply a method of centering the two image sources in order to provide the hybrid image