Figure 8.

Dual tracer imaging using ¹¹¹ n-WBC and ^99mTc-sulfur colloid. Planar ¹¹¹In-WBC (a,b) and ^99mTc-sulfur colloid (c,d) images from a 62-year-old male with diabetes with a left foot abscess. There is spatial and intensity discordance in activity from the radionuclides. Anterior (a) and lateral (b) ¹¹¹In-WBC images show focus of increased activity in the left mid foot. Anterior (c) and lateral (d) ^99mTc-sulfur colloid images show diffuse activity throughout the mid and hind foot, suggesting the development of Charcot foot. Axial and sagittal ¹¹¹In-WBC SPECT/CT (e) localized activity to an abscess in the plantar aspect of the left mid foot. Osteomyelitis was excluded.