Metal artifact reduction algorithm

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Metal artifact reduction (MAR) algorithms are used to improve CT image quality in patients with metalware, however, can be affected by novel artifacts . There are a number of commercially-available algorithms (in 2019) :

  • iterative MAR (iMAR) - Siemens
  • MAR for orthopedic implants (O-MAR) - Philips
  • single-energy MAR (SEMAR) - Toshiba/Canon
  • SmartMAR - GE

Practical points

  • images obtained with and without MAR should be reviewed together with multiplanar reformats to avoid misinterpreting newly created artifacts