Use of fossil fuels and associated climate change have been constantly in the news recently carbon footprint is defined as "the total set of greenhouse gas emissions caused directly and indirectly by an individual, organization, event or product" 1 All of us can contribute in our own ways to help reduce the carbon foot print.

Energy expenditure in an average sized radiology departmentCT scannersI have looked at manufacturer specifications for latest 64 slice CT scanner. The average power demand is in the region of 20 to 30 KVA at 85% PF.For a scanner that is switched on at 8:00 am and switched off at 5:00 pm, his equates to an average consumption of 150 to 230 KWH of power per day or in other words the scanner uses energy that produces an equivalent of 2400 to 3700 tons of CO2...

Carbon trust UK; Carbon footprinting-An introduction for organisations CTV 033 16/08/2007Website of National Energy foundation UK; http://www.nef.org.uk/greencompany/co2calculator.htm