Results 1 to 10 of about 30,161 (113)

Added value of non-rigid image registration for intrafraction dose accumulation in magnetic resonance imaging-guided prostate radiotherapy [PDF]

open access: yesPhysics and Imaging in Radiation Oncology
This work investigates potential advantages of non-rigid versus rigid image registration for intrafraction dose reconstruction in hypofractionated prostate radiotherapy. The data of 15 patients were analyzed using 3D cine magnetic resonance imaging (MRI)
Georgios Tsekas   +4 more
doaj   +2 more sources

Non-rigid image registration of 4D-MRI data for improved delineation of moving tumors [PDF]

open access: yesBMC Medical Imaging, 2020
Background To increase the image quality of end-expiratory and end-inspiratory phases of retrospective respiratory self-gated 4D MRI data sets using non-rigid image registration for improved target delineation of moving tumors. Methods End-expiratory and
Stefan Weick   +9 more
doaj   +2 more sources

A Novel Correspondence Selection Technique for Affine Rigid Image Registration

open access: yesIEEE Access, 2018
This paper presents a novel technique called correspondence selection for rigid transformations in order to effectively refine keypoint matches in rigid image registration. The proposed technique mainly lies in the following two components.
Guohua Lv
doaj   +3 more sources

Non-Rigid Multi-Modal 3D Medical Image Registration Based on Foveated Modality Independent Neighborhood Descriptor

open access: yesSensors, 2019
The non-rigid multi-modal three-dimensional (3D) medical image registration is highly challenging due to the difficulty in the construction of similarity measure and the solution of non-rigid transformation parameters.
Feng Yang, Mingyue Ding, Xuming Zhang
doaj   +3 more sources

An Effective Non-Rigid Registration Approach for Ultrasound Images Based on the Improved Variational Model of Intensity, Local Phase Information and Descriptor Matching [PDF]

open access: yesJournal of Imaging
Ultrasound images have some limitations, such as low signal-to-noise ratio (SNR), speckle noise, lower dynamic range, blurred boundaries, and shadowing; therefore, ultrasound image registration is an important task for estimating tissue motion and ...
Kun Zhang, Jinming Xing, Qingtai Xiao
doaj   +2 more sources

Robust Non-Rigid Feature Matching for Image Registration Using Geometry Preserving

open access: yesSensors, 2019
In this paper, a robust non-rigid feature matching approach for image registration with geometry constraints is proposed. The non-rigid feature matching approach is formulated as a maximum likelihood (ML) estimation problem.
Hao Zhu   +4 more
doaj   +3 more sources

Rigid registration algorithm based on the minimization of the total variation of the difference map

open access: yesJournal of Synchrotron Radiation, 2022
Image registration is broadly used in various scenarios in which similar scenes in different images are to be aligned. However, image registration becomes challenging when the contrasts and backgrounds in the images are vastly different.
Xianghui Xiao   +4 more
doaj   +1 more source

Fully Leveraging Deep Learning Methods for Constructing Retinal Fundus Photomontages

open access: yesApplied Sciences, 2021
Retinal photomontages, which are constructed by aligning and integrating multiple fundus images, are useful in diagnosing retinal diseases affecting peripheral retina.
Jooyoung Kim   +4 more
doaj   +1 more source

A Multistage Rigid-Affine-Deformable Network for Three-Dimensional Multimodal Medical Image Registration

open access: yesApplied Sciences, 2023
Multimodal image registration is an important component of medical image processing, allowing the integration of complementary information from various imaging modalities to improve clinical applications like diagnosis and treatment planning. We proposed
Anika Strittmatter   +2 more
doaj   +1 more source

Adaptive Physics-Based Non-Rigid Registration for Immersive Image-Guided Neuronavigation Systems

open access: yesFrontiers in Digital Health, 2021
Objective: In image-guided neurosurgery, co-registered preoperative anatomical, functional, and diffusion tensor imaging can be used to facilitate a safe resection of brain tumors in eloquent areas of the brain. However, the brain deforms during surgery,
Fotis Drakopoulos   +15 more
doaj   +1 more source

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