Abstract: Due to the small amount of effective information of conventional medical images, the reference to conventional medical images will affect the judgment of the tumor condition, resulting in low clinical effect of tumor radiotherapy. Therefore, medical image fusion technology is proposed and applied to tumor radiotherapy. This paper uses medical equipment to collect the initial medical image of the patient, pre-processes the medical image through grayscale, negative image and histogram. After the registration space transformation of the medical image, the reference image and the floating image are imported into the registration space to ensure that the mapping point  coincides with the origin of the pixel to realize the registration processing of multi-modal medical images. The fusion operator is used to fuse each level and coefficient of the medical image to obtain the reconstructed medical fusion image. The medical image fusion result is output and  applied in tumor radiotherapy to determine the location of the target area and adjust the radiation dose so as to achieve radiotherapy for patients. The experimental results show that the application of medical image fusion technology to the actual tumor radiotherapy work can effectively improve the clinical treatment effect of tumors and has high application value.

Key words: medical image, image fusion technology, tumor treatment, radiotherapy