Dual radionuclide subtraction imaging of vertebral disc infection using an 111In-labelled leucocyte scan and a 99mTc-tin colloid scan.

Interpretation of the posterior view of an 111In-labelled leucocyte scan is difficult when infection is suspected in that region of the spine overlaid by the left lobe of the liver. A case is reported of the successful localisation of infection in this region by combining an 111In-labelled leucocyte scan with a 99mTc-tin colloid scan in a dual radionuclide subtraction technique.