ArticleJournal of medical radiation sciences2025
Switch It Off! Carbon, Financial and Health Service Impacts of Switching Off a Computed Tomography Scanner: A Quality Improvement Study.
Article in Journal of medical radiation sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Authors and funding
6 authors.
Funding
Abstract
introductionMedical imaging has been identified as a carbon hotspot in health care, and demand for imaging services is increasing. This study investigated switching off a surplus computerised tomography (CT) scanner when not clinically required as a possible simple and scalable intervention to reduce healthcare emissions.
methodsThis before-after quality improvement study introduced a 'Switch it off' intervention where radiography staff switched off the power to a surplus CT scanner after hours (17:00-08:00) for 7 days ('intervention period': 07/7/2023-13/07/2023). Using a power data logger, power consumption (kilowatt hours, KWh) during the intervention period was compared to 7 days without the switch-off practice ('control period': 24/07/2023-31/07/2023). Financial and carbon emission impacts were calculated based on energy consumption. All CT radiographers working in the department were invited to undertake a pre and post intervention survey. Differences in quantitative data pre- and postintervention were analysed using chi-squared test for independent proportions. Free text survey responses were summarised into themes.
resultsCompared with energy use in the control period (433.96 kWh), there was a reduction in 139.79 kWh during the intervention period (294.17 kWh): 32% relative reduction. Extrapolation to 12 months found potential savings of 7280 kWh in energy use, $1381 to the hospital budget, and 5.5 T CO
conclusionIdentifying and switching off surplus CT scanners in low use times is a simple and scalable intervention that can achieve significant power, financial and carbon savings with little to no impact on clinical workflow.
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