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Deformable models in medical image analysis: a survey
1996
Medical Image Analysis
Preserved Fulltext
shape representation, matching, and motion tracking. ...
They have proven to be effective in segmenting, matching, and tracking anatomic structures by exploiting (bottom-up) constraints derived from the image data together with (top-down) a priori knowledge ...
TM is grateful for the financial support of an NSERC postgraduate scholarship. DT is a fellow of the Canadian Institute for Advanced Research. ...
doi:10.1016/s1361-8415(96)80007-7
pmid:9873923
fatcat:pb3ros6vcbdhte4ifj7xnbqnfe
Magnetic resonance measurement of transient shear wave propagation in a viscoelastic gel cylinder
2008
Journal of the mechanics and physics of solids
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The technique employs tagged magnetic resonance imaging (MRI) synchronized to periodic impact excitation of a bulk specimen. ...
A magnetic resonance measurement technique was developed to characterize the transient mechanical response of a gel cylinder subjected to angular acceleration. ...
Hood, and Richard Nagel for technical support. ...
doi:10.1016/j.jmps.2007.10.012
pmid:18568090
pmcid:PMC2435052
fatcat:ajuv3vbhffanfnsqkb5e3lmugi
MRI-based technique for determining nonuniform deformations throughout the volume of articular cartilage explants
2005
Magnetic Resonance in Medicine
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The custom pulse sequence incorporated the "delays alternating with nutations for tailored excitation" (DANTE) pulse sequence to apply tags. ...
The error analysis using the phantom material indicated that deformations can be determined with an error, defined as the strain precision, better than 0.83% strain. ...
Marc Geers, Eindhoven University of Technology, The Netherlands, for providing his custom strain measurement code, and Laura Melton for her assistance in harvesting the cartilage explant. ...
doi:10.1002/mrm.20343
pmid:15678528
fatcat:xx35ft6lkzecpka5kqksvlvbc4
Automatic alignment of standard views in 3D echocardiograms using real-time tracking
2009
Medical Imaging 2009: Ultrasonic Imaging and Signal Processing
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The main goal of this thesis has been to explore the possibilities of using state estimation methods for segmentation and tracking of structures in volumetric data with deformable models. ...
The ability of using non-iterative estimators, such as the Kalman filter, for fitting deformable models to image structures would radically reduce the computationally effort required for performing a 3D ...
and Technology (NTNU) for access to the datasets used. ...
doi:10.1117/12.805380
fatcat:yyzsi6dvsrhclhmqjo5axjigqi
A remeshed vortex method for mixed rigid/soft body fluid–structure interaction
[article]
2020
arXiv
pre-print
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We outline a 2D algorithm for solving incompressible flow--structure interaction problems for mixed rigid/soft body representations, within a consistent framework based on the remeshed vortex method. ...
Through these illustrations, we showcase the ability of our solver to robustly deal with different constitutive models and boundary conditions, solve disparate multi-physics problems and achieve faster ...
CBET-1846752 (MG) and by the Blue Waters project (OCI-0725070, ACI-1238993), a joint effort of the University of Illinois at Urbana-Champaign and its National Center for Supercomputing Applications. ...
arXiv:2011.09669v1
fatcat:reqh4fmylzfirarfax3vwtiuby
Chaotic mixing and transport in wavy Taylor–Couette flow
2002
Physica D : Non-linear phenomena
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The results show how mixing is enhanced with increasing rotating Reynolds number as a consequence of increased stretching and folding that occurs in meridional, latitudinal, and circumferential surfaces ...
The axial particle transport increases with the rotating Reynolds number as a consequence of stretching and folding within the vortices and the axial transport between vortices, both related to the waviness ...
In order to validate the particle tracking code, particles were tracked in a mathematically generated velocity field that was mapped on to a three-dimensional polar grid with spacing similar to the experimental ...
doi:10.1016/s0167-2789(02)00529-8
fatcat:h5rsidv6mbfofdt2oh2kzxcfwi
Robustness of target dose coverage to motion uncertainties for scanned carbon ion beam tracking therapy of moving tumors
2015
Physics in Medicine and Biology
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We modeled various deviations from perfect tracking that could arise due to uncertainty in organ motion and limited precision of a scanned ion beam tracking system. ...
To accomplish this, we simulated beam tracking for moving targets in both water phantoms and a sample of lung cancer patients using a research treatment planning system. ...
Acknowledgments We thank George Starkschall for helpful scientific discussions regarding uncertainties in lung motion. ...
doi:10.1088/0031-9155/60/4/1717
pmid:25650520
pmcid:PMC4384336
fatcat:jowfrujdrjds7fxqfrtx7mdjeq
Quantitative Imaging Methods for the Development and Validation of Brain Biomechanics Models
2012
Annual Review of Biomedical Engineering
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Modeling and simulation hold promise for illuminating the mechanisms of traumatic brain injury (TBI) and for developing preventive devices and strategies. ...
First, they must capture the biomechanics of the brain as both a material and a structure, including the mechanics of brain tissue and its interactions with the skull. ...
Owing to limited space, this review omits many relevant studies; we regret and apologize for these omissions.
LITERATURE CITED ...
doi:10.1146/annurev-bioeng-071811-150032
pmid:22655600
pmcid:PMC3711121
fatcat:47s3wfpuuvdbdkjvarssnxsidq
Evolution of an eroding cylinder in single and lattice arrangements
2017
Journal of Fluids and Structures
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2017 pre-print arXiv:1703.04068v1 fatcat:by7gmr4c5nct3celpulwn2osjm
A cylinder is then modelled within an infinite array of other cylinders by simulating a repeating unit cell and their profile evolution is studied. ...
A similar terminal form is discovered for large cylinder spacings with consistent flow conditions and an intermediate profile was found with a closely packed lattice before reaching the common terminal ...
Figure 2 : 2 Lattice of cylinders are shown for both the (a) sparsely spaced (L/2a 0 = 8) and (b) closely packed (L/2a 0 = 4) configurations with their respective repeating computational unit cells used ...
doi:10.1016/j.jfluidstructs.2017.01.011
fatcat:bbumvrvknbfgzkb3kxjxqssomm
Recent developments in single-molecule DNA mechanics
2012
Current Opinion in Structural Biology
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Acknowledgements We thank Jan Lipfert, Maxim Sheinin, Ralf Seidel, Mark Bathe, Erwin Peterman, Hendrik Dietz, and John Marko for helpful discussions and for providing data and images. ...
A.B. is supported by a Stanford Bio-X graduate fellowship, F.C.O. is supported by a Swiss National Science Foundation fellowship, and Z.B. is supported by a Pew Scholars Award. ...
Extension is measured from the focal depth z, while angle is measured by tracking xy motion constrained to a circular orbit about the DNA axis. ...
doi:10.1016/j.sbi.2012.04.007
pmid:22658779
pmcid:PMC3726534
fatcat:fzoxs55fczcfpg5ha66q3ttrrm
The flow-induced vibration of an elliptical cross-section at varying angles of attack
2018
Journal of Fluids and Structures
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This aspect ratio is large enough so that the deformation from a circular cylinder is obvious, but not so large that the geometry is not related to the cylinder. ...
However, for large angles, where the body is far from symmetric with respect to the wake centreline, the flow can be markedly different with distinct asymmetric modes, including one which is period-doubled ...
Thompson for providing the spectral-element code used for the simulations. ...
doi:10.1016/j.jfluidstructs.2017.12.013
fatcat:54davvzydvf4te7ktrzoynnqce
Starting flow through nozzles with temporally variable exit diameter
2005
Journal of Fluid Mechanics
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A dimensionless temporal parameter is derived in order to track the vortex formation process for the various classes of nozzle motion. ...
Kinematic models of the starting flows are used to accurately predict the fluid circulation produced by the vortex generators, and to emphasize the special role of the nozzle boundary layer in dictating ...
The authors acknowledge enlightening and informative discussions with M. H. Dickinson, M. Milano, T. S. Pottebaum, A. E. Staples and J. J. Allen. We also thank ...
doi:10.1017/s002211200500515x
fatcat:43vekdhyrrgghjbvhtn22tt2yi
On the Mechanism of Large Amplitude Flapping of Inverted Foil in a Uniform Flow
[article]
2017
arXiv
pre-print
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An elastic foil interacting with a uniform flow with its trailing edge clamped, also known as the inverted foil, exhibits a wide range of complex self-induced flapping regimes such as large amplitude flapping ...
Due to the absence of vortex shedding process in the low-Re regime, the inverted foil no longer exhibits the periodic flapping. ...
The LAF of inverted foil with a splitter closely resemble the VIV of an elastically mounted circular cylinder. ...
arXiv:1711.01065v1
fatcat:ee6fnyj3yjbf5ogoybjimnccja
Shape from depth discontinuities under orthographic projection
2009
2009 IEEE 12th International Conference on Computer Vision Workshops, ICCV Workshops
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We present a new method for reconstructing the 3-D surface of an opaque object from the motion of its depth discontinuities, when viewed under orthographic projection as the object undergoes rigid rotation ...
A novel shape completion scheme is introduced to fill in gaps in the recovered surface, which would otherwise be impossible to reconstruct from the motion of the depth discontinuities alone. ...
For this model, consider the case of a cylinder of radius r separated from the rotation axis by a distance R (with its symmetry axis parallel to the rotation axis). ...
doi:10.1109/iccvw.2009.5457427
dblp:conf/iccvw/LanmanHT09
fatcat:w3uqlls77jcanliqh3e2gqq75i
Simulation of the Doi–Edwards model in complex flow
1999
Journal of rheology
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Synopsis The Doi-Edwards model is simulated in startup of two-dimensional complex flow. The flow geometry is that of a cylinder confined between two parallel plates. ...
The second method is a new method which is introduced in this paper. We refer to this approach as the deformation field method. Theoretically the methods are equivalent. ...
The Doi-Edwards model does not lead to a closed-form equation for the stress tensor. ...
doi:10.1122/1.551022
fatcat:5p5irkooonfjpn7bccxiv2ldla
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