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Medical Image Registration Incorporating Deformations

PJ Edwards, DLG Hill, JA Little, VAS Sahni, DJ Hawkes
1995 Procedings of the British Machine Vision Conference 1995  
In this paper we describe a general method for 3D deformation, show how registration can incorporate a composite of rigid body and deformation components and illustrate this methodology on 3 example sets  ...  Non rigid deformation and composite warping showed significant improvement in registration accuracy in each case.  ...  The registration algorithm can be rigid body, or incorporate deformations.  ... 
doi:10.5244/c.9.69 dblp:conf/bmvc/EdwardsHLSH95 fatcat:hdibf3inezdvng3aa6auljcz6e

Non-rigid Face Modelling Using Shape Priors [chapter]

Alessio Del Bue, Xavier Lladó, Lourdes Agapito
2005 Lecture Notes in Computer Science  
Some of the points are frequently on rigid parts of the structure -for instance the nose -while others lie on deformable areas.  ...  This paper is based on the observation that often not all the points on a moving and deforming surface such as a human face are undergoing non-rigid motion.  ...  Roy-Chowdhury for fruitful discussions on the estimation of the deformability index. This work has been partially supported by EPSRC grant GR/S61539/01.  ... 
doi:10.1007/11564386_9 fatcat:uawfmlzmmzf37ak4f4po6lioje

Multimaterial 3D Printed Soft Actuators Powered by Shape Memory Alloy Wires

Saeed Akbari, Amir Hosein Sakhaei, Sahil Panjwani, Kavin Kowsari, Ahmad Serjourei, Qi Ge
2019 Sensors and Actuators A-Physical  
The model incorporates a user defined material subroutine that describes the nonlinear temperature dependant behavior of SMAs.  ...  In order to achieve a broad range of deformations, ten different printing materials were characterized and used in the actuators design.  ...  The one-dimensional deformation of SMA wires was then incorporated into the 3D printed soft structures to create various types of deformations.  ... 
doi:10.1016/j.sna.2019.03.015 fatcat:duk64a4b3ralfpybodyc27ztvi

Landmark-constrained 3-D Histological Imaging: A Morphology-preserving Approach [article]

Simone Gaffling, Volker Daum, Joachim Hornegger
2011 International Symposium on Vision, Modeling, and Visualization  
In this article, we propose a novel way to incorporate landmarks representing the morphological progression.  ...  They are used as additional regularization for intensity based non-rigid registration which is capable to exactly match the landmarks.  ...  Into this scheme for a non-rigid registration we now want to incorporate landmarks.  ... 
doi:10.2312/pe/vmv/vmv11/309-316 dblp:conf/vmv/GafflingDH11 fatcat:7atbiq2ccjhr7ae7m6ahlbek7u

Deformable registration with spatially varying degrees of freedom constraints

James V. Miller, Girish Gopalakrishnan, Manasi Datar, Paulo R.S. Mendonca, Rakesh Mullick
2008 2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro  
In this paper, we present a technique that aligns rigid structures using rigid constraints while aligning soft tissue with a high degree of freedom deformation.  ...  However, smoothness constraints applied to the deformation and insufficient degrees of freedom in the deformation may distort the more rigid tissue types such as bone.  ...  We have shown how a deformable registration technique known for estimating high degree of freedom deformations (Demons) can be constrained to incorporate rigid and linear motions embedded in free-form  ... 
doi:10.1109/isbi.2008.4541208 dblp:conf/isbi/MillerGDMM08 fatcat:qzgrybzezfgg7kr5eehpuk64l4

Incorporating Rigid Structures in Non-rigid Registration Using Triangular B-Splines [chapter]

Kexiang Wang, Ying He, Hong Qin
2005 Lecture Notes in Computer Science  
features (C 0 continuity) along the interface between deformable regions and rigid structures, because of the unique advantages offered by triangular B-splines, such as flexible triangular domain, local  ...  The experimental results show that, by accurately modeling sharp features using triangular B-splines, the deformable regions in the vicinity of rigid structures are less constrained by the global smoothness  ...  near rigid structures.  ... 
doi:10.1007/11567646_20 fatcat:lbcoo4ezbzeilcft567zjzgb7i

Elastic model based non-rigid registration incorporating statistical shape information [chapter]

Yongmei Wang, Lawrence H. Staib
1998 Lecture Notes in Computer Science  
This paper describes a new method of non-rigid registration using the combined power of elastic and statistical shape models.  ...  It is shown that statistical boundary shape information significantly augments and improves elastic model based non-rigid registration. 1  ...  E l a s t i c M o d e l There is no true elastic model for deformation because, for example, one anatomical structure does not literally result from the deformation of another structure.  ... 
doi:10.1007/bfb0056306 fatcat:heqvkt7knff3vfasxqz7z6feka

A Biomechanical Model of the Human Head for Elastic Registration of MR-Images [chapter]

A. Hagemann, K. Rohr, H. S. Stiehl, U. Spetzger, J. M. Gilsbach
1999 Informatik aktuell  
The accuracy of image-guided neurosurgery generally su ers from brain deformations due to intraoperative c hanges, e.g. brain shift or tumor resection.  ...  The correspondences for anatomical structures are both computed and incorporated into 2 as described in 4 .  ...  Di erent materials were incorporated by spatially varying the material parameters according to the underlying anatomical structure.  ... 
doi:10.1007/978-3-642-60125-5_8 dblp:conf/bildmed/HagemannRSSG99 fatcat:dmgfrdbdqbhhri5lvliigftfve

Deformable image registration for adaptive radiotherapy with guaranteed local rigidity constraints

Lars König, Alexander Derksen, Nils Papenberg, Benjamin Haas
2016 Radiation Oncology  
The approach restricts those structures to rigid deformations, while surrounding tissue is still allowed to deform elastically.  ...  Methods: A DIR framework is extended by constraints, enforcing locally rigid deformation behavior for arbitrary delineated structures.  ...  This motivates incorporation of improved deformation models [8, 9] .  ... 
doi:10.1186/s13014-016-0697-4 pmid:27647456 pmcid:PMC5029058 fatcat:rox2em2ebvb3zfpxas64xys3zu

Intensity-Based Non-rigid Registration Using Adaptive Multilevel Free-Form Deformation with an Incompressibility Constraint [chapter]

Torsten Rohlfing, Calvin R. Maurer
2001 Lecture Notes in Computer Science  
deformations (as judged by visual assessment) while preserving the volume of contrast-enhanced structures.  ...  A major problem with non-rigid image registration techniques in many applications is their tendency to reduce the volume of contrast-enhancing structures [10] .  ...  This approach of course requires identification of these structures prior to or during registration. Also, it prevents deformation of these structures even in cases where they have actually deformed.  ... 
doi:10.1007/3-540-45468-3_14 fatcat:2zdjdeeznjcdnp3u5gybmifj34

Page 347 of American Society of Civil Engineers. Collected Journals Vol. 110, Issue 2 [page]

1984 American Society of Civil Engineers. Collected Journals  
Nevertheless, the rigid-plastic analysis can provide some guidelines for the selection of the links To obtain an idea of how the structure deformation relates to the member deformation under the rigid-plastic  ...  Such an es- timate can be obtained from a rigid-plastic analysis of the structure. Ki- nematically admissible fields of deformation for three frames having rigid- plastic members are shown in Fig. 8.  ... 

Global-to-Local Non-Rigid Shape Registration

Hui Chen, B. Bhanu
2006 18th International Conference on Pattern Recognition (ICPR'06)  
The local deformation is performed within an optimization formulation, in which the bending energy of thin plate spline transformation is incorporated as a regularization term to keep the structure of  ...  the model shape preserved under the shape deformation.  ...  (b) The bending energy of TPS is incorporated into an optimization formulation as a regularization term to preserve the structure of the model shape under the shape deformation.  ... 
doi:10.1109/icpr.2006.609 dblp:conf/icpr/ChenB06b fatcat:jbohv4z4ifekzllv7jmvorffeq


S. Kamath, E. Schreibmann, D. Levy, D. Paquin, L. Xing
2006 International Journal of Radiation Oncology, Biology, Physics  
Purpose/Objective(s): Conventional deformable registration treats all image volume equally and the calculations are "brute-force" in nature.  ...  In this work we investigate a strategy of using a priori knowledge of the system to reduce the dimensionality of the deformable image registration problem and to speed up the registration calculation.  ...  A control volume typically resides in or close to a bony structure. Each control volume is mapped onto the moving image using a rigid transformation, which is computationally fast and robust.  ... 
doi:10.1016/j.ijrobp.2006.07.1197 fatcat:y6n37wjo2bbazpdf44coezyiti

Deformable image registration with local rigidity constraints for cone-beam CT-guided spine surgery

S Reaungamornrat, A S Wang, A Uneri, Y Otake, A J Khanna, J H Siewerdsen
2014 Physics in Medicine and Biology  
Rigid registration alone fails to account for deformation associated with changes in spine curvature, and conventional deformable registration fails to account for rigidity of the vertebrae, causing unrealistic  ...  The method also incorporated an injectivity constraint (IC) to preserve topology.  ...  Kristy Brock (Department of Radiation Oncology, University of Toronto) are gratefully acknowledged for valuable discussion regarding deformable image registration. The authors also thank Dr.  ... 
doi:10.1088/0031-9155/59/14/3761 pmid:24937093 pmcid:PMC4118832 fatcat:cnejldukhnbezj44jy2pytd2lq

Limit analysis for stiffened eight-bolted base plate connections in EHV transmission towers

Hongjun Liu, Yazhou Liu, Zhengliang Li, Haibin Huang
2018 Journal of constructional steel research  
Four yield-line models for rigid EBBP connections, considering the contributions of stiffeners, are presented: Model 1 is applicable to such a connection that incorporates flexible anchor bolts and flexible  ...  The base plate, stiffeners and anchor bolts will simultaneously undergo plastic deformation when the connection attains its ultimate strength.  ...  Model 2 is applicable to such a connection that incorporates rigid anchor bolts and flexible stiffeners.  ... 
doi:10.1016/j.jcsr.2018.02.006 fatcat:za5x6u7lkrbiblawagagwiivee
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