Dual-energy CT after radiofrequency ablation of liver, kidney, and lung lesions: a review of features

Insights into Imaging

Table 3 Early and long-term findings after RF ablation of lung lesions in successful and unsuccessful results, with the added value of the DECT technique

		Early findings	Long-term findings
Successful	General findings	Partial or circumferential ground-glass opacification surrounding the treated tumour	Reduction in size
Successful	Added value of DECT	Vanishing of the iodine uptake in the treated tumour, with a clear delineation of the avascular zone on the iodine-coded images	Shrinkage of the avascular zone
Unsuccessful	General findings	Lack of ground-glass opacification around a part of the tumour is not decisive of success	Centrally located enhancements - Enhancement not already present immediately after the RF ablation Growth of the ablation zone Change from ground-glass to solid opacity
Unsuccessful	Added value of DECT	Improved contrast of iodine in the lesion on the 40-keV and iodine-coded images ‘Enhancing’ of a part of the tumour on the 40-keV compared to the water map image	Internal iodine uptake in the ablation zone