Electromagnetic Navigation System for CT-Guided Biopsy

of ablation regions of unablated tumor, often is needed for optimal lesion depiction. Thus mental registration is needed between the anatomic information acquired with offline modalities (such as contrast-enhanced CT, MRI, and PET/CT) and the guiding modali-ty findings. As procedures become more complex, synthesis of the requisite informa-tion becomes more challenging. Various de-vices have been developed to assist in this spatial navigation. Electromagnetic tracking is one potential method of acquiring spatial navigation infor-mation in real time that is based on reconstruc-tion of and interaction with datasets of previ-ously acquired images [2–12]. This method can enable accurate positioning of therapeu