A three-dimensional wavelet-based algorithm for nonlinear registration of an elastic body model of the brain is developed. Surfaces of external and internal anatomic brain structures are used to guide alignment. The deformation field is represented with a multiresolution wavelet expansion and is modeled by the partial differential equations of linear elasticity. A progressive estimation of the registration parameters and the usage of an adaptive distance map reduce algorithm complexity, thereby providing computational flexibility that allows mapping of large, high resolution datasets. The performance of the algorithm was evaluated on rat brains. The wavelet-based registration method yielded a twofold improvement over affine registration.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/TMI.2003.819280 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pre-stack seismic inversion for reservoir characterization in Pleistocene to Pliocene channels, Baltim gas field, Nile Delta, Egypt.
Sci Rep
January 2025
Geophysics Department, FacultyofScience, Cairo University, Giza, 12613, Egypt.
The Nile Delta, North Africa's leading gas-producing region, was the focus of this study aimed at delineating gas-bearing sandstone reservoirs from the Pleistocene to Pliocene formations using a combination of pre-stack inversion and rock physics analysis. This research employed seismic inversion techniques, including full-angle stack seismic volumes, well logs, and 3-D with rock physics modeling to refine volumes of P-wave velocity (Vp), S-wave velocity (Vs), and density. Traditional seismic attributes, such as far amplitude, proved insufficient for confirming gas presence, highlighting partial angle stacks, integrated the need for advanced methods.
View Article and Find Full Text PDFClinical Feasibility of 3-D Acoustic Radiation Force Impulse (ARFI) Imaging for Targeted Prostate Biopsy Guidance.
Ultrason Imaging
January 2025
Department of Biomedical Engineering, Duke University, Durham, NC, USA.
Article Synopsis
- Developed a 3-D acoustic radiation force impulse (ARFI) system for prostate imaging to identify cancerous regions and guide biopsies in one visit using a transrectal probe and 3-D visualization software.
- The system was tested in a clinical trial comparing ARFI-guided targeted transperineal biopsies with other standard biopsy methods.
- Results showed ARFI was less effective for lower-grade cancers but performed well for higher-grade cancers, suggesting it could enhance biopsy accuracy when combined with 2-D imaging techniques.
Carbonate stringers are defined as a slab of carbonate bodies encased inside salt. In Oman, the intra-salt carbonate stringers are a very common target, especially in South Oman Salt Basin (SOSB). These stringers contain a large amount of hydrocarbon resources.
View Article and Find Full Text PDFMedium-entropy Zr-Nb-Ti alloys with low magnetic susceptibility, high yield strength, and low elastic modulus through spinodal decomposition for bone-implant applications.
Acta Biomater
December 2024
Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia. Electronic address:
Medium-entropy Zr-Nb-Ti (ZNT) alloys are being extensively investigated as load-bearing implant materials because of their exceptional biocompatibility and corrosion resistance, and low magnetic susceptibility. Nevertheless, enhancing their yield strength while simultaneously decreasing their elastic modulus presents a formidable obstacle, significantly constraining their broader utilization as metallic biomaterials. In this study, three medium-entropy ZNT alloys, i.
View Article and Find Full Text PDFComparison of mechanical properties of 3D printer resins for occlusal splints using different models of 3D printers.
J Clin Exp Dent
September 2024
DDS, MS, PhD, Professor, Department of Dentistry, University of Brasilia (UnB), Brasilia, Federal District, Brazil.
Background: Considering the development of new 3D printing technologies that use different printing techniques, further studies must be conducted to evaluate the impact of different printing systems on the mechanical properties of 3D-printed materials. This study aimed to evaluate the mechanical properties of 3D-printed materials for occlusal devices using different 3D printers and printing layer thicknesses.
Material And Methods: Ninety rectangular samples were manufactured and divided into nine groups according to the 3D printer model they were printed on (AnyCubic Mono X, Elegoo Mars 2, or FlashForge Hunter) and the layer thickness (20, 50, or 100 µm) and were subjected to superficial microhardness, flexural resistance, and elasticity modulus tests.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!