Slip-ring (CT)

Last revised by Andrew Murphy on 15 Mar 2021

Slip-ring functions to allow the transfer of electrical information and power between a rotating device and external components. They are used in helical CT and MRI scanners among other applications; in this setting, they allow image acquisition without progressive twisting of cables as the scanner rotates

A rotating circular conductor as opposed to a nonrotating conductive metallic strip to allow a complete circuit to be maintained despite device rotation. 

Specific functions of slip rings include:

  • transferring high voltage to power the rotating device 
  • transferring information to the rotating device (for example from a CT control room to the CT scanner) 
  • transferring information from the rotating device (for example from a CT detector array)

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