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**Anser EMT** ========= An open-source electromagnetic tracking platform ================================================ **Purpose** ------- Electromagnetic tracking is the gold-standard for instrument tracking and navigation in the clinical setting without visual line-of-sight. While clinical platforms exist for interventional bronchoscopy and neurosurgical navigation, the limited flexibility and high costs of electromagnetic tracking (EMT) systems for research investigations mitigate against a better understanding of the technology's characterisation and limitations. The aim of the Anser project is to provide an open-source implementation for electromagnetic tracking with particular application to image-guided interventions. The system is compatible with commercially available EMT sensors as well as the Open Network Interface for Image-Guided Therapy (OpenIGTLink) for easy communication with visualisation toolkits such as MITK and 3D Slicer. @[youtube](