Real-time tracking of rectal tumours during colorectal cancer surgery

Interventions: Use of an electromagnetic navigation system to improve insight and orientation during pelvic surgery. Primary outcome(s): The primary outcome of this study was feasibility. Feasibility was defined as successful completion of the whole investigational workflow resulting in continuous delivery of interpretable navigation data for rectal surgery. Study Design: N/A: single arm study, Open (masking not used), N/A , unknown, Other