Applications of spectral CT calcium suppression for percutaneous bone tumor ablation procedures.

Two cases are presented in which spectral CT calcium suppression was perceived as beneficial for percutaneous cryoablation of bone tumors. Cases include cryoablation of a lytic sacral/iliac bone metastasis and cryoablation of recurrent pigmented villonodular synovitis (PVNS) at the posterior aspect of the right knee. Calcium suppression images have a potential role in the visualization of bone lesions for treatment planning and the visualization of ice ball growth for treatment monitoring.