Lung cancer is one of the common types of cancer in the world. It is hard to detect cancer and the affected level at an early stage. CT and MRI help us to detect this type of cancers at an early stage. Fusion of a CT and MRI images can be done for obtaining best results. However, in previous works, this method of diagnosis has not been carried out. In this proposed work combining of CT and MRI images can be done and the level of cancer in the lungs can be identified. Image fusion is used to identify the common features between the two images this can be used to improve the quality of the images for easy identification.