An Improved Medical Image Registration Method
نویسندگان
چکیده
Image registration is a necessary pre-processing step before quantitative analysis of brain MR data. A novel variational optical flow approach for image registration is proposed in this paper. The advantages of our method are as follows. We coupled bias correction and optical flow image registration within the unified variational framework. We could recover the corrected target image through the estimated bias field. Experiments on synthetic and real brain images demonstrate the advantages of our method.
منابع مشابه
A Novel Subsampling Method for 3D Multimodality Medical Image Registration Based on Mutual Information
Mutual information (MI) is a widely used similarity metric for multimodality image registration. However, it involves an extremely high computational time especially when it is applied to volume images. Moreover, its robustness is affected by existence of local maxima. The multi-resolution pyramid approaches have been proposed to speed up the registration process and increase the accuracy of th...
متن کاملEvaluation of deformable image registration in HDR gynecological brachytherapy
Introduction: In brachytherapy, as in external radiotherapy, image-guidance plays an important role. For GYN treatments it is standard to acquire at least CT images and preferably MR images prior to each treatment and to calculate the dose of the day on each set of images. Then, the dose to the target and to the organs at risk (OAR) is calculated with worst case scenario from I...
متن کاملبهبود سرعت "انطباق مبتنی بر روش برش گراف" جهت انطباق غیر صلب تصاویر تشدید مغناطیسی مغز
Image processing methods, which can visualize objects inside the human body, are of special interests. In clinical diagnosis using medical images, integration of useful data from separate images is often desired. The images have to be geometrically aligned for better observation. The procedure of mapping points from the reference image to corresponding points in the floating image is called Ima...
متن کاملApplication of Improved Genetic Algorithm in Practical Medical Image Registration
Image registration is a useful technique for medical diagnosis and treatment. However,using basic genetic algorithm as similarity metric in medical image registration has some shortcomings,such as low efficiency and premature convergence that may lead to fail in medical image registration. This paper aims to provide an improved genetic algorithm on which such problems could be settled.Operation...
متن کاملQuantitative SPECT and planar 32P bremsstrahlung imaging for dosimetry purpose –An experimental phantom study
Background: In this study, Quantitative 32P bremsstrahlung planar and SPECT imaging and consequent dose assessment were carried out as a comprehensive phantom study to define an appropriate method for accurate Dosimetry in clinical practice. Materials and Methods: CT, planar and SPECT bremsstrahlung images of Jaszczak phantom containing a known activity of 32P were acquired. In addition, Phanto...
متن کامل