This invention pertains a system and methods for ablation treatment of tissues. The invention aims to aid healthcare professionals in completely treating all the target tissues by fusing computer generated information highlighting which tissues have been treated and which not to images of the tissues. The systems and methods integrate seamlessly with current image-guided procedures and do not require tracking systems to gather the position of the ablation device, as the position and orientation of the device are identified from images. The invention aims also to improve estimates of the ablation volumes associated to an ablation device by identifying from images the true geometry of devices that might deform during the deployment in tissues the invention aims to improve estimates of the ablation volumes by using information about the ablation process and about the status of tissues which can be collected from the control system of the ablation device.
