Hepatic cancer is one of the most common solid cancers in the world. As surgery of hepatic cancer is seldom applicable, different solutions have been found to cure this disease. One of these is Liver Radiofrequency Ablation that consists in a needle insertion inside the liver parenchyma in order to reach the tumour and in an injection of a radiofrequency current to cause tumour cell necrosis for hyperthermia. The correct needle placement task is really difficult. The Augmented Reality can help the surgeon to place the needle as best as possible; the application can also help the surgeon during preoperative planning because it offers various visualization modality of 3D models of the patient’s organs obtained from the medical images.