Results 41 to 50 of about 648,535 (141)

Contour Propagation for Radiotherapy Treatment Planning Using Nonrigid Registration and Parameter Optimization: Case Studies in Liver and Breast Cancer

open access: yesApplied Sciences, 2022
Radiotherapy treatments are carried out using computerized axial tomography. In radiation therapy planning, the radiation oncologist must do a manual segmentation of volumes of interest to delineate the organs that should be irradiated.
Eliseo Vargas-Bedoya   +5 more
doaj   +1 more source

Optimizing 3DCT image registration for interfractional changes in carbon-ion prostate radiotherapy

open access: yesScientific Reports, 2023
To perform setup procedures including both positional and dosimetric information, we developed a CT–CT rigid image registration algorithm utilizing water equivalent pathlength (WEPL)-based image registration and compared the resulting dose distribution ...
Ryusuke Hirai   +4 more
doaj   +1 more source

The Influence of Intensity Standardization on Medical Image Registration

open access: yes, 2010
Acquisition-to-acquisition signal intensity variations (non-standardness) are inherent in MR images. Standardization is a post processing method for correcting inter-subject intensity variations through transforming all images from the given image gray ...
Bagci, Ulas, Bai, Li, Udupa, Jayaram K.
core   +1 more source

THE IMAGE REGISTRATION OF FOURIER-MELLIN BASED ON THE COMBINATION OF PROJECTION AND GRADIENT PREPROCESSING [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Image registration is one of the most important applications in the field of image processing. The method of Fourier Merlin transform, which has the advantages of high precision and good robustness to change in light and shade, partial blocking, noise ...
D. Gao, X. Zhao, X. Pan
doaj   +1 more source

New Evolutionary-Based Techniques for Image Registration

open access: yesApplied Sciences, 2019
The work reported in this paper aims at the development of evolutionary algorithms to register images for signature recognition purposes. We propose and develop several registration methods in order to obtain accurate and fast algorithms.
Catalina-Lucia Cocianu, Alexandru Stan
doaj   +1 more source

SAR Image and Optical Image Registration Based on Point Feature [PDF]

open access: yesJisuanji gongcheng, 2019
Aiming at the low registration accuracy of Synthetic Aperture Radar (SAR) images and optical images,a point feature descriptor HHIHC based on corner amplitude and orientation is proposed to improve the Harris corner detector.The detector's response ...
QIN Jie, JI Zexuan, CAO Guo
doaj   +1 more source

A method of UAV visible light remote sensing image registration based on eigenvector technique

open access: yesResults in Engineering, 2023
As the advancement of unmanned aerial vehicle technology and deep learning technology, many deep learning technologies have been applied in the field of unmanned aerial vehicle image research.
Yuelei Qian, Hongbin Shi, Guangchun Liu
doaj   +1 more source

Computing Topology Preservation of RBF Transformations for Landmark-Based Image Registration

open access: yes, 2014
In image registration, a proper transformation should be topology preserving. Especially for landmark-based image registration, if the displacement of one landmark is larger enough than those of neighbourhood landmarks, topology violation will be ...
A Rossi De   +14 more
core   +1 more source

Topography-assisted UAV InSAR Image Registration Method with Image Partition

open access: yesLeida xuebao
Miniaturized and lightweight Unmanned Aerial Vehicles (UAV) provide a flexible platform for Synthetic Aperture Radar (SAR). The application of UAV Interferometric SAR (InSAR) is gradually increasing in interferometric measurement fields.
Xin XIE   +3 more
doaj   +1 more source

Attention Guided Policy Optimization for 3D Medical Image Registration

open access: yesIEEE Access, 2023
Learning-based image registration approaches typically learn to map from input images to a transformation matrix. Regarding the current deep-learning-based image rigid registration approaches learn a transformation matrix in a one-shot way.
Jing Hu   +6 more
doaj   +1 more source

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