Rapid disinfection of radiology treatment rooms using an autonomous ultraviolet germicidal irradiation robot

Published:January 19, 2022DOI:


      • A disinfection procedure using an autonomous UVC robot was evaluated.
      • Each robotic disinfection procedure lasted less than 10 minutes.
      • The mean UVC dose across 12 sample locations was found to be 13.01±4.36 mJ/cm2.
      • The robotic procedure led to greater bioburden reduction than manual disinfection.
      • Findings indicate that automated disinfection procedures could cut turnaround times.



      Ultraviolet germicidal irradiation (UVGI) technologies have emerged as a promising adjunct to manual cleaning, however, their potential to shorten cleaning times remains unexplored.


      A <10-minute disinfection procedure was developed using a robotic UVGI platform. The efficacy and time to perform the UVGI procedure in a CT scan treatment room was compared with current protocols involving manual disinfection using biocides. For each intervention, environmental samples were taken at 12 locations in the room before and after disinfection on seven distinct occasions.


      The mean UVC dose at each sample location was found to be 13.01 ± 4.36 mJ/cm2, which exceeded published UVC thresholds for achieving log reductions of many common pathogens. Significant reductions in microbial burden were measured after both UVGI (P . 001 ) and manual cleaning (P . 05 ) conditions, with the UVGI procedure revealing the largest effect size (r = 0.603).


      These results support the hypothesis that automated deployments of UVGI technology can lead to germicidal performance that is comparable with, and potentially better than, current manual cleaning practices.


      Our findings provide early evidence that the incorporation of automated UVGI procedures into cleaning workflow could reduce turnaround times in radiology, and potentially other hospital settings.

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