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Deformable Image Registration

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https://www.readbyqxmd.com/read/29148579/a-step-by-step-review-on-patient-specific-biomechanical-finite-element-models-for-breast-mri-to-x-ray-mammography-registration
#1
REVIEW
Eloy García, Yago Diez, Oliver Diaz, Xavier Lladó, Robert Martí, Joan Martí, Arnau Oliver
Breast magnetic resonance imaging (MRI) and X-ray mammography are two image modalities widely used for the early detection and diagnosis of breast diseases in women. The combination of these modalities leads to a more accurate diagnosis and treatment of breast diseases. The aim of this paper is to review the registration between breast MRI and X-ray mammographic images using patient-specific finite element-based biomechanical models. Specifically, a biomechanical model is obtained from the patient's MRI volume and is subsequently used to mimic the mammographic acquisition...
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29148040/the-endocranial-shape-of-australopithecus-africanus-surface-analysis-of-the-endocasts-of-sts-5-and-sts-60
#2
Amélie Beaudet, Jean Dumoncel, Frikkie de Beer, Stanley Durrleman, Emmanuel Gilissen, Anna Oettlé, Gérard Subsol, John Francis Thackeray, José Braga
Assessment of global endocranial morphology and regional neuroanatomical changes in early hominins is critical for the reconstruction of evolutionary trajectories of cerebral regions in the human lineage. Early evidence of cortical reorganization in specific local areas (e.g. visual cortex, inferior frontal gyrus) is perceptible in the non-human South African hominin fossil record. However, to date, little information is available regarding potential global changes in the early hominin brain. The introduction of non-invasive imaging techniques opens up new perspectives for the study of hominin brain evolution...
November 16, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29142336/multi-atlas-based-ct-synthesis-from-conventional-mri-with-patch-based-refinement-for-mri-based-radiotherapy-planning
#3
Junghoon Lee, Aaron Carass, Amod Jog, Can Zhao, Jerry L Prince
Accurate CT synthesis, sometimes called electron density estimation, from MRI is crucial for successful MRI-based radiotherapy planning and dose computation. Existing CT synthesis methods are able to synthesize normal tissues but are unable to accurately synthesize abnormal tissues (i.e., tumor), thus providing a suboptimal solution. We propose a multi-atlas-based hybrid synthesis approach that combines multi-atlas registration and patch-based synthesis to accurately synthesize both normal and abnormal tissues...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29122471/3d-registration-of-mpmri-for-assessment-of-prostate-cancer-focal-therapy
#4
Clément Orczyk, Andrew B Rosenkrantz, Artem Mikheev, Arnauld Villers, Myriam Bernaudin, Samir S Taneja, Samuel Valable, Henry Rusinek
RATIONALE AND OBJECTIVES: This study aimed to assess a novel method of three-dimensional (3D) co-registration of prostate magnetic resonance imaging (MRI) examinations performed before and after prostate cancer focal therapy. MATERIALS AND METHODS: We developed a software platform for automatic 3D deformable co-registration of prostate MRI at different time points and applied this method to 10 patients who underwent focal ablative therapy. MRI examinations were performed preoperatively, as well as 1 week and 6 months post treatment...
November 6, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29122361/ventilation-measured-on-clinical-4d-cbct-increased-ventilation-accuracy-through-improved-image-quality
#5
Kasper R Jensen, Carsten Brink, Olfred Hansen, Uffe Bernchou
BACKGROUND AND PURPOSE: Ventilation measured on 4D cone-beam computed tomography (CBCT) using deformable image registration (DIR) may predict specific radiation sensitivity, but the measurement is affected by the current image quality. With 4D computed tomography (CT) measured ventilation acting as a gold standard the current study investigates if image improvements increase the accuracy of 4D-CBCT measured ventilation. MATERIAL AND METHODS: The study consists of 4D-CBCT and 4D-CT scans of 20 non-small-cell lung cancer patients...
November 6, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29116939/topology-guided-deformable-registration-with-local-importance-preservation-for-biomedical-images
#6
Chaojie Zheng, Xiuying Wang, Shan Zeng, Jianlong Zhou, Yong Yin, Dagan Feng, Michael Fulham
The demons registration (DR) model is well recognized for its deformation capability. However, it might lead to misregistration due to erroneous diffusion direction when there are no overlaps between corresponding regions. We propose a novel registration energy function, introducing topology energy, and incorporating a local energy function into the DR in a progressive registration scheme, to address these shortcomings. The topology energy that is derived from the topological information of the images serves as a direction inference to guide diffusion transformation to retain the merits of DR...
November 8, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29116054/non-rigid-ct-cbct-to-cbct-registration-for-online-external-beam-radiotherapy-guidance
#7
Cornel Zachiu, Baudouin Denis de Senneville, Rob H N Tijssen, Alexis N T J Kotte, Antonetta Christina Houweling, Linda G W Kerkmeijer, Jan J W Lagendijk, Chrit T W Moonen, Mario G Ries
Image-guided external beam radiotherapy (EBRT) allows radiation dose deposition with a high degree of accuracy and precision. Guidance is usually achieved by estimating the displacements, via image registration, between cone beam computed tomography (CBCT) and computed tomography (CT) images acquired at different stages of the therapy. The resulting displacements are then used to reposition the patient such that the location of the tumor at the time of treatment matches its position during planning. Moreover, ongoing research aims to use CBCT-CT image registration for online plan adaptation...
November 8, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29100940/multimodal-surface-matching-with-higher-order-smoothness-constraints
#8
Emma C Robinson, Kara Garcia, Matthew F Glasser, Zhengdao Chen, Timothy S Coalson, Antonios Makropoulos, Jelena Bozek, Robert Wright, Andreas Schuh, Matthew Webster, Jana Hutter, Anthony Price, Lucilio Cordero Grande, Emer Hughes, Nora Tusor, Philip V Bayly, David C Van Essen, Stephen M Smith, A David Edwards, Joseph Hajnal, Mark Jenkinson, Ben Glocker, Daniel Rueckert
In brain imaging, accurate alignment of cortical surfaces is fundamental to the statistical sensitivity and spatial localisation of group studies; and cortical surface-based alignment has generally been accepted to be superior to volume-based approaches at aligning cortical areas. However, human subjects have considerable variation in cortical folding, and in the location of functional areas relative to these folds. This makes alignment of cortical areas a challenging problem. The Multimodal Surface Matching (MSM) tool is a flexible, spherical registration approach that enables accurate registration of surfaces based on a variety of different features...
October 31, 2017: NeuroImage
https://www.readbyqxmd.com/read/29100697/automated-reference-free-local-error-assessment-of-multimodal-deformable-image-registration-for-radiotherapy-in-the-head-and-neck
#9
Michael G Nix, Robin J D Prestwich, Richard Speight
BACKGROUND: Head and neck MR-CT deformable image registration (DIR) for radiotherapy planning is hindered by the lack of both ground-truth and per-patient accuracy assessment methods. This study assesses novel post-registration reference-free error assessment algorithms, based on local rigid re-registration of native and pseudomodality images. METHODS: Head and neck MR obtained in and out of the treatment position underwent DIR to planning CT. Block-wise mutual information (b-MI) and pseudomodality mutual information (b-pmMI) algorithms were validated against applied rotations and translations...
October 31, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29099616/investigating-the-minimum-scan-parameters-required-to-generate-free-breathing-motion-artifact-free-fast-helical-ct
#10
David H Thomas, Jun Tan, John Neylon, Tai Dou, Dylan O'Connell, Mike McNitt-Gray, Percy Lee, James Lamb, Daniel A Low
OBJECTIVE: A recently proposed "5DCT" protocol uses deformable registration of free-breathing fast-helical CT scans to generate a breathing motion model. In order to allow accurate registration, free-breathing images are required to be free of doubling-artifacts, which arise when tissue motion is greater than scan speed. METHODS: Using a unique set of digital phantoms based on patient data and verified with a motion-phantom, this work identifies the minimum scanner parameters required to successfully generate the required free-breathing artifact-free fast-helical scans...
November 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29098167/mesh-to-raster-region-of-interest-based-nonrigid-registration-of-multimodal-images
#11
Rosalia Tatano, Benjamin Berkels, Thomas M Deserno
Region of interest (RoI) alignment in medical images plays a crucial role in diagnostics, procedure planning, treatment, and follow-up. Frequently, a model is represented as triangulated mesh while the patient data is provided from computed axial tomography scanners as pixel or voxel data. Previously, we presented a 2-D method for curve-to-pixel registration. This paper contributes (i) a general mesh-to-raster framework to register RoIs in multimodal images; (ii) a 3-D surface-to-voxel application, and (iii) a comprehensive quantitative evaluation in 2-D using ground truth (GT) provided by the simultaneous truth and performance level estimation (STAPLE) method...
October 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29097945/ventilation-series-similarity-a-study-for-ventilation-calculation-using-deformable-image-registration-and-4dct-to-avoid-motion-artifacts
#12
Geoffrey G Zhang, Kujtim Latifi, Vladimir Feygelman, Kuei-Ting Chou, Tzung-Chi Huang, Thomas J Dilling, Bradford A Perez, Eduardo G Moros
The major problem with ventilation distribution calculations using DIR and 4DCT is the motion artifacts in 4DCT. Quite often not all phases would exhibit mushroom motion artifacts. If the ventilation series similarity is sufficiently robust, the ventilation distribution can be calculated using only the artifact-free phases. This study investigated the ventilation similarity among the data derived from different respiration phases. Fifteen lung cancer cases were analyzed. In each case, DIR was performed between the end-expiration phase and all other phases...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29097881/a-lagrangian-gauss-newton-krylov-solver-for-mass-and-intensity-preserving-diffeomorphic-image-registration
#13
Andreas Mang, Lars Ruthotto
We present an efficient solver for diffeomorphic image registration problems in the framework of Large Deformations Diffeomorphic Metric Mappings (LDDMM). We use an optimal control formulation, in which the velocity field of a hyperbolic PDE needs to be found such that the distance between the final state of the system (the transformed/transported template image) and the observation (the reference image) is minimized. Our solver supports both stationary and non-stationary (i.e., transient or time-dependent) velocity fields...
2017: SIAM Journal on Scientific Computing: a Publication of the Society for Industrial and Applied Mathematics
https://www.readbyqxmd.com/read/29095850/lesions-in-deep-gray-nuclei-after-severe-traumatic-brain-injury-predict-neurologic-outcome
#14
Frédéric Clarençon, Éric Bardinet, Jacques Martinerie, Vincent Pelbarg, Nicolas Menjot de Champfleur, Rajiv Gupta, Eléonore Tollard, Gustavo Soto-Ares, Danielle Ibarrola, Emmanuelle Schmitt, Thomas Tourdias, Vincent Degos, Jérome Yelnik, Didier Dormont, Louis Puybasset, Damien Galanaud
PURPOSE: This study evaluates the correlation between injuries to deep gray matter nuclei, as quantitated by lesions in these nuclei on MR T2 Fast Spin Echo (T2 FSE) images, with 6-month neurological outcome after severe traumatic brain injury (TBI). MATERIALS AND METHODS: Ninety-five patients (80 males, mean age = 36.7y) with severe TBI were prospectively enrolled. All patients underwent a MR scan within the 45 days after the trauma that included a T2 FSE acquisition...
2017: PloS One
https://www.readbyqxmd.com/read/29094303/high-thickness-histological-sections-as-alternative-to-study-the-three-dimensional-microscopic-human-sub-cortical-neuroanatomy
#15
Eduardo Joaquim Lopes Alho, Ana Tereza Di Lorenzo Alho, Lea Grinberg, Edson Amaro, Gláucia Aparecida Bento Dos Santos, Rafael Emídio da Silva, Ricardo Caires Neves, Maryana Alegro, Daniel Boari Coelho, Manoel Jacobsen Teixeira, Erich Talamoni Fonoff, Helmut Heinsen
Stereotaxy is based on the precise image-guided spatial localization of targets within the human brain. Even with the recent advances in MRI technology, histological examination renders different (and complementary) information of the nervous tissue. Although several maps have been selected as a basis for correlating imaging results with the anatomical locations of sub-cortical structures, technical limitations interfere in a point-to-point correlation between imaging and anatomy due to the lack of precise correction for post-mortem tissue deformations caused by tissue fixation and processing...
November 1, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/29084212/a-method-to-quantify-mechanobiologic-forces-during-zebrafish-cardiac-development-using-4-d-light-sheet-imaging-and-computational-modeling
#16
Vijay Vedula, Juhyun Lee, Hao Xu, C-C Jay Kuo, Tzung K Hsiai, Alison L Marsden
Blood flow and mechanical forces in the ventricle are implicated in cardiac development and trabeculation. However, the mechanisms of mechanotransduction remain elusive. This is due in part to the challenges associated with accurately quantifying mechanical forces in the developing heart. We present a novel computational framework to simulate cardiac hemodynamics in developing zebrafish embryos by coupling 4-D light sheet imaging with a stabilized finite element flow solver, and extract time-dependent mechanical stimuli data...
October 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29076331/an-evaluation-of-the-benefits-of-simultaneous-acquisition-on-pet-mr-coregistration-in-head-neck-imaging
#17
Serena Monti, Carlo Cavaliere, Mario Covello, Emanuele Nicolai, Marco Salvatore, Marco Aiello
Coregistration of multimodal diagnostic images is crucial for qualitative and quantitative multiparametric analysis. While retrospective coregistration is computationally intense and could be inaccurate, hybrid PET/MR scanners allow acquiring implicitly coregistered images. Aim of this study is to assess the performance of state-of-the-art coregistration methods applied to PET and MR acquired as single modalities, comparing the results with the implicitly coregistration of a hybrid PET/MR, in complex anatomical regions such as head/neck (HN)...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29073332/numerical-methods-for-polyline-to-point-cloud-registration-with-applications-to-patient-specific-stent-reconstruction
#18
Claire Yilin Lin, Alessandro Veneziani, Lars Ruthotto
We present novel numerical methods for Polyline-to-Point-Cloud Registration and their application to patient-specific modeling of deployed coronary artery stents from image data. Patient-specific coronary stent reconstruction is an important challenge in computational hemodynamics and relevant to the design and improvement of the prostheses. It is an invaluable tool in large-scale clinical trials that computationally investigate the effect of new generations of stents on hemodynamics and eventually tissue remodeling...
October 26, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29072506/deformable-multi-modal-registration-using-3d-fast-conditioned-mutual-information
#19
Xueli Liu, Zhixian Tang, Manning Wang, Zhijian Song
PURPOSE: Mutual information (MI) has been a preferred choice of similarity measure for multi-modal image registration, but the accuracy and robustness of MI are not satisfactory as MI only considers the global intensity correlation while ignoring local and structural information. To address this problem, we combine MI with local and structural information. METHOD: We bring structural information extracted by a modified Accelerated Segment Test (FAST) algorithm into MI...
October 26, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29072320/technical-note-correction-for-the-effect-of-breathing-variations-in-ct-pulmonary-ventilation-imaging
#20
Tokihiro Yamamoto, Sven Kabus
PURPOSE: The accuracy and precision of computed tomography (CT) pulmonary ventilation imaging with conventional CT scanners are limited by breathing variations. We propose a method to correct for the effect of breathing variations in CT ventilation imaging based on external respiratory signals acquired throughout a scan. METHODS: The proposed method is based on: (1) calculating voxel-by-voxel abdominal surface motion ranges using four-dimensional (4D) CT image datasets spatiotemporally correlated with external respiratory monitor data, and (2) applying the correction factor, which is defined as the ratio of the overall mean of the abdominal surface motion range in the lungs to that of each voxel, to the CT ventilation value...
October 26, 2017: Medical Physics
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