 In patients with CT features of IA on the Diagnostic CT see No. 2 above and who have been commenced on antifungal chemotherapy, two followup, lowdose CTs without iv contrast will be performed at 10 days and 4 weeks after the diagnostic CT. These CT studies will not only allow us to evaluate the serial changes on CT but also determine the potential relationships between the initial CT features, haematological factors and outcome. 