1. Energy consumption of new and old GE MRI models
Geraldine Tran MD1, Maria Pamatmat MPH1, Craig Devincent RT1, Gail Lee MS2, Alastair Martin PhD1
1 Department of Radiology and Biomedical Imaging, University of California, San Francisco, California
2 Office of Sustainability, University of California, San Francisco, California
Introduction
US health care is large producer of carbon emissions through the world
2nd most energy-intensive building
7th largest producer of CO2 worldwide
10% of CO2 generated in country
200,000 annual deaths in US related to air pollution
Radiology is major energy consumer within healthcare center
Federal agencies focused on sustainability in imaging equipment
Opportunities for energy savings due to variability of function and nighttime consumption
Radiology top 2 energy consumer at UCSF
UCSF MRI Inventory: 17 clinical, 2 research
Objectives
Describe energy usage of UCSF’s MRI machines
Compare energy usage of new GE Premier with older models
Identify areas for energy conservation
Methods
Results
Results
Conclusion
GE Signa Premier may be more energy efficient than older models
Standby uses least amount of energy and should be maximized
Energy usage differences could be due to:
Improvements in engineering
Location
Water chillers for MR750 and HDx are remote and several stories from their magnets which may create longer and higher pressure circuits for cooling system
Next steps:
Analyze exam types across all 3 GE scanners
Investigate scanners designed for energy efficiency
Promote standby mode usage when appropriate
GE Signa Premier 3T
GE Discovery MR750 3T
GE HDx 3T
2018
Software 27x
Outpatient
2009
Software 26x
Inpatient/outpatient
2005
Software 23x
Outpatient
Power measured at 1 sec intervals over 4-10 hours a day
Area under curve (AUC) estimated power (kwh)
Equation:
“y” kw * “x” hours = “power” kwh