Three-dimensional temporal bone reconstruction from histological sections

2014 ◽  
Vol 128 (5) ◽  
pp. 416-420 ◽  
Author(s):  
N Ahmad ◽  
A Wright
Keyword(s):  
High Resolution ◽  
Temporal Bone ◽  
Personal Computer ◽  
Three Dimensional ◽  
Jugular Bulb ◽  
Chorda Tympani Nerve ◽  
Three Dimensional Model ◽  
Histological Sections ◽  
Volumetric Reconstruction ◽  
Stapes Footplate

AbstractObjective:To produce a high-resolution, three-dimensional temporal bone model from serial sections, using a personal computer.Method:Digital images were acquired from histological sections of the temporal bone. Image registration, segmentation and three-dimensional volumetric reconstruction were performed using a personal computer. The model was assessed for anatomical accuracy and interactivity by otologists.Results:An accurate, high-resolution, three-dimensional model of the temporal bone was produced, containing structures relevant to otological surgery. The facial nerve, labyrinth, internal carotid artery, jugular bulb and all of the ossicles were seen (including the stapes footplate), together with the internal and external auditory meati. Some projections also showed the chorda tympani nerve.Conclusion:A high-resolution, three-dimensional computer model of the complete temporal bone was produced using a personal computer. Because of the increasing difficulty in procuring cadaveric bones, this model could be a useful adjunct for training.

scholarly journals RAS-NAAD: 40-yr High-Resolution North Atlantic Atmospheric Hindcast for Multipurpose Applications (New Dataset for the Regional Mesoscale Studies in the Atmosphere and the Ocean)

2020 ◽  
Vol 59 (5) ◽  
pp. 793-817 ◽  
Author(s):  
Alexander Gavrikov ◽  
Sergey K. Gulev ◽  
Margarita Markina ◽  
Natalia Tilinina ◽  
Polina Verezemskaya ◽  
...  
Keyword(s):  
High Resolution ◽  
Ocean Circulation ◽  
North Atlantic ◽  
Three Dimensional ◽  
Vertical Direction ◽  
Lateral Boundary Condition ◽  
Three Dimensional Model ◽  
Free Atmosphere ◽  
The North ◽  
The North Atlantic

AbstractWe present in this paper the results of the Russian Academy of Sciences North Atlantic Atmospheric Downscaling (RAS-NAAD) project, which provides a 40-yr 3D hindcast of the North Atlantic (10°–80°N) atmosphere at 14-km spatial resolution with 50 levels in the vertical direction (up to 50 hPa), performed with a regional setting of the WRF-ARW 3.8.1 model for the period 1979–2018 and forced by ERA-Interim as a lateral boundary condition. The dataset provides a variety of surface and free-atmosphere parameters at sigma model levels and meets many demands of meteorologists, climate scientists, and oceanographers working in both research and operational domains. Three-dimensional model output at 3-hourly time resolution is freely available to the users. Our evaluation demonstrates a realistic representation of most characteristics in both datasets and also identifies biases mostly in the ice-covered regions. High-resolution and nonhydrostatic model settings in NAAD resolve mesoscale dynamics first of all in the subpolar latitudes. NAAD also provides a new view of the North Atlantic extratropical cyclone activity with a much larger number of cyclones as compared with most reanalyses. It also effectively captures highly localized mechanisms of atmospheric moisture transports. Applications of NAAD to ocean circulation and wave modeling are demonstrated.

Three-dimensional reconstruction based on images from spiral high-resolution computed tomography of the temporal bone: anatomy and clinical application

2005 ◽  
Vol 119 (9) ◽  
pp. 693-698 ◽  
Author(s):  
Beom-Cho Jun ◽  
Sun-Wha Song ◽  
Ju-Eun Cho ◽  
Chan-Soon Park ◽  
Dong-Hee Lee ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
3D Reconstruction ◽  
Temporal Bone ◽  
Three Dimensional ◽  
Image Data ◽  
Computer Assisted ◽  
Surface Rendering ◽  
High Resolution Computed Tomography

The aim of this study was to investigate the usefulness of a three-dimensional (3D) reconstruction of computed tomography (CT) images in determining the anatomy and topographic relationship between various important structures. Using 40 ears from 20 patients with various otological diseases, a 3D reconstruction based on the image data from spiral high-resolution CT was performed by segmentation, volume-rendering and surface-rendering algorithms on a personal computer. The 3D display of the middle and inner ear structures was demonstrated in detail. Computer-assisted measurements, many of which could not be easily measured in vivo, of the reconstructed structures provided accurate anatomic details that improved the surgeon’s understanding of spatial relationships. A 3D reconstruction of temporal bone CT might be useful for education and increasing understanding of the anatomical structures of the temporal bone. However, it will be necessary to confirm the correlation between the 3D reconstructed images and histological sections through a validation study.

Microscale fluid flow analysis in a human osteocyte canaliculus using a realistic high-resolution image-based three-dimensional model

2012 ◽  
Vol 4 (10) ◽  
pp. 1198-1206 ◽  
Author(s):  
Hiroshi Kamioka ◽  
Yoshitaka Kameo ◽  
Yuichi Imai ◽  
Astrid D. Bakker ◽  
Rommel G. Bacabac ◽  
...  
Keyword(s):  
Fluid Flow ◽  
High Resolution ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Resolution Image ◽  
High Resolution Image ◽  
Fluid Flow Analysis

Interactive visualization of electron density slices

2005 ◽  
Vol 38 (3) ◽  
pp. 563-565 ◽  
Author(s):  
Filipe R. N. C. Maia ◽  
Abraham Szöke ◽  
Warren DeLano ◽  
David van der Spoel
Keyword(s):  
High Resolution ◽  
Quantum Chemistry ◽  
Electron Density ◽  
Three Dimensional ◽  
Structure Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Molecular Visualization ◽  
Density Maps ◽  
Quantum Chemistry Calculations

A new tool has been developed to aid in the visualization of electron density in crystals or from quantum chemistry calculations. It displays the fine details of the electron density on a plane and the three-dimensional model of the molecule at the same time. The program enables the user to examine the details of weak or irregular features. Such features frequently occur in low-resolution maps, where they determine the correct tracing of a protein backbone. In high-resolution maps, solvent regions are difficult or impossible to observe using isosurfaces. The tool has been integrated into an existing molecular visualization package (PyMol) making it possible to observe and interact both with a structure model and the electron density slices freely, simultaneously and independently. This visualization model fills a gap in the visualization methods available to crystallographers and others who work with electron density maps.

A High-Resolution Oil Drift Model on the Swedish Coast

1999 ◽  
Vol 1999 (1) ◽  
pp. 289-293
Author(s):  
Cecilia Ambjörn ◽  
Olof Liungman ◽  
Gustaf Törling
Keyword(s):  
High Resolution ◽  
West Coast ◽  
Three Dimensional ◽  
Coast Guard ◽  
Geographical Information ◽  
Local Model ◽  
Three Dimensional Model ◽  
Swedish West Coast ◽  
Drift Model ◽  
Open Sea

ABSTRACT The Swedish Meteorological and Hydrological Institute (SMHI) has developed a system for oil drift forecasting, which can be used by local authorities. The system shall predict where oil, coming from the open sea, hits the beaches or other parts of the archipelago. One crucial idea is that the system shall be easy to handle and also give fast calculations. An operational three-dimensional hydrodynamical model covering the North Sea and the Baltic Sea is run daily at SMHI. When oil is found in the open sea the Swedish Coast Guard makes an oil drift forecast based on the daily runs. The oil drift forecasts are used as input data to the high-resolution local model for the Swedish west coast, which calculates the transport, behaviour, and spreading of the oil. The whole calculation is made within a GIS system. That gives access to all the geographical information and information about vulnerable areas. In order not to be dependent on daily data transmission, the local model can choose between 71 different precalculated current fields. These fields are calculated using a three-dimensional model named PHOENICS, with a grid which is highly adapted to the coastal contours. Current measurements are performed for use as boundary values for the simulation of the precalculated current fields. This forecasting system is now developed for the northern part of the Swedish west coast (down to Gothenburg).

scholarly journals Challenges and approaches in three-dimensional modeling the engineering geological conditions of Hanoi area

2020 ◽  
Vol 61 (2) ◽  
pp. 1-9
Author(s):  
Ha Viet Nhu ◽  
Keyword(s):  
High Resolution ◽  
Statistical Evaluation ◽  
Three Dimensional ◽  
Geological Structure ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Geological Engineering ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Geological Conditions

In this study, the approaches and research methods have been proposed based on the analysis of challenges in modeling, establishing a three-dimensional model of geological engineering conditions of the Hanoi area. The three-dimensional model of the Hanoi area was composed of 21 geological engineering units as a stacked structure, with accuracy and reliability were verified by statistical evaluation. Based on the integration of engineering geological attributes, the model has contributed for reconstruction of the geospatial engineering geological structure of the study area as comprehensive, continuously, and high resolution.

Sign in / Sign up

Export Citation Format

Share Document