Additionally , anatomical variations between the acquisition of the pre-operatively CT image and surgery are not accounted for .
Errors during the registration process might result in diversification from the optimal angulations of the C - arm and must be manually corrected .
Anatomical variations between the acquisition of the pre-operatively CT image and surgery are not accounted for .
Errors during the registration process might result in diversification from the optimal angulations of the C - arm and must be manually corrected .