Hybrid Modality Fusion of Planar Scintigrams and CT Topograms to Localize Sentinel Lymph Nodes in Breast Lymphoscintigraphy: Technical Description and Phantom Studies

Figure 1

Traditional breast lymphoscintigraphy technique with ⁵⁷Co-backlighting for localization. The four images on the left (A.I–A.IV) are emission images for a bi-lateral lymphoscintigraphic study. The current protocol for localizing sentinel nodes is to backlight the patient using a ⁵⁷Co sheet source to create a silhouette of the patient. The anterior (B.I), left lateral (B.II), and right lateral emission + ⁵⁷Co transmission images (B.III) are shown on the right.