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Area of Science:

  • Medical Imaging Technology
  • Sustainable Healthcare Practices
  • Energy Efficiency in Medical Devices

Background:

  • Traditional CT scanner energy saving strategies are impractical for short inter-examination idle periods.
  • This study addresses the need for efficient energy management during brief downtimes in CT imaging.

Purpose of the Study:

  • To evaluate the energy consumption savings of a rapid-reactivation CT scanner power save mode.
  • To assess the impact of this power save mode on CT technologist workflow.

Main Methods:

  • A Siemens SOMATOM X.ceed CT scanner was equipped with a power save mode activating after 5 minutes of inactivity.
  • Power consumption was monitored over 28 weeks, segmenting data into active, idle, and power save states.
  • Correlation between nonproductive time and power save usage was analyzed, and energy savings were calculated.

Main Results:

  • The power save mode accounted for 58.1% of nonproductive time, showing a strong correlation (r=0.81) with daily nonproductive time.
  • Mean power draw was lower in power save mode (1.6 kW) compared to idle state (2.1 kW).
  • Estimated energy savings ranged from 7.2% of total consumption to 20.7% of nonproductive consumption, with no reported workflow disruptions.

Conclusions:

  • The CT scanner power save mode effectively reduces energy consumption during inter-examination idle periods.
  • This mode offers a practical sustainability solution for CT scanners when full shutdowns are not feasible.
  • No workflow disruptions or technical issues were reported by CT technologists using the power save mode.