scholarly journals Patterns of postnatal ontogeny of the skull and lower jaw of snakes as revealed by micro‐ CT scan data and three‐dimensional geometric morphometrics

2016 ◽  
Vol 229 (6) ◽  
pp. 723-754 ◽  
Author(s):  
Alessandro Palci ◽  
Michael S. Y. Lee ◽  
Mark N. Hutchinson
Keyword(s):  
Ct Scan ◽  
Geometric Morphometrics ◽  
Three Dimensional ◽  
Postnatal Ontogeny ◽  
Micro Ct ◽  
Lower Jaw ◽  
Scan Data

A three-dimensional skeleton of Goniopholididae from the Late Jurassic of Portugal: implications for the Crocodylomorpha bracing system

2019 ◽  
Vol 189 (2) ◽  
pp. 521-548 ◽  
Author(s):  
E Puértolas-Pascual ◽  
O Mateus
Keyword(s):  
Ct Scan ◽  
Aquatic Ecosystems ◽  
Late Jurassic ◽  
Three Dimensional ◽  
Micro Ct ◽  
Anterior Process ◽  
Juvenile Individual ◽  
Lateral Margins ◽  
Bracing System ◽  
Shed Light

Abstract We here describe an articulated partial skeleton of a small neosuchian crocodylomorph from the Lourinhã Formation (Late Jurassic, Portugal). The skeleton corresponds to the posterior region of the trunk and consists of dorsal, ventral and limb osteoderms, dorsal vertebrae, thoracic ribs and part of the left hindlimb. The paravertebral armour is composed of two rows of paired osteoderms with the lateral margins ventrally deflected and an anterior process for a ‘peg and groove’ articulation. We also compare its dermal armour with that of several Jurassic and Cretaceous neosuchian crocodylomorphs, establishing a detailed description of this type of osteoderms. These features are present in crocodylomorphs with a closed paravertebral armour bracing system. The exceptional 3D conservation of the specimen, and the performance of a micro-CT scan, allowed us to interpret the bracing system of this organism to assess if previous models were accurate. The characters observed in this specimen are congruent with Goniopholididae, a clade of large neosuchians abundant in most semi-aquatic ecosystems from the Jurassic and Early Cretaceous of Laurasia. However, its small size, contrasted with the sizes observed in goniopholidids, left indeterminate whether it could have been a dwarf or juvenile individual. Future histological analyses could shed light on this.

Computed tomography scanning for three-dimensional imaging and complexity analysis of developing root systems

2005 ◽  
Vol 83 (11) ◽  
pp. 1434-1442 ◽  
Author(s):  
Melinda Lontoc-Roy ◽  
Pierre Dutilleul ◽  
Shiv O. Prasher ◽  
Liwen Han ◽  
Donald L. Smith
Keyword(s):  
Computed Tomography ◽  
Fractal Dimension ◽  
Ct Scan ◽  
Root System ◽  
Complexity Analysis ◽  
Three Dimensional ◽  
Root Systems ◽  
Soil Conditions ◽  
Advanced Analysis ◽  
Scan Data

To improve our understanding of the role of root systems in soil-based resource acquisition by plants and eventually model it completely, root system complexity must be quantified, in addition to other morphometric traits. In this note, we introduce a new approach in which computed tomography (CT) scan data are collected on crop root systems in three-dimensional (3-D) space nondestructively and noninvasively, thus allowing for repeated measurements and a relevant complexity analysis of root systems. The experimental crop is maize ( Zea mays L.). Four potted seedlings were CT scanned under wet soil conditions on the day of emergence, and each of the two following days. Specifically, a high-resolution X-ray CT scanner formerly used for medical purposes produced 3 × 500 CT images of 0.1 mm thick cross-sections for each seedling. The fractal dimension of each root system on each day was estimated on a skeletonized 3-D image reconstructed from CT scan data. We found that the mean fractal dimension value was not significantly greater than 1 on day 1 (1.015 ± 0.015), contrary to days 2 and 3 (1.037 ± 0.015, 1.065 ± 0.016). Our results, including original 3-D images, provide support for a novel type of root system studies based on the collection and advanced analysis of CT scan data.

An approach to construct a three-dimensional isogeometric model from μ-CT scan data with an application to the bridge of a violin

2020 ◽  
Vol 78 ◽  
pp. 101815
Author(s):  
Sandra Marschke ◽  
Linus Wunderlich ◽  
Wolfgang Ring ◽  
Klaus Achterhold ◽  
Franz Pfeiffer
Keyword(s):  
Ct Scan ◽  
Three Dimensional ◽  
Scan Data

scholarly journals 92. Improvement of three-dimensional display image by helical CT scan data

1990 ◽  
Vol 46 (8) ◽  
pp. 1066
Author(s):  
T. KATAKURA ◽  
K. KIMURA ◽  
K. SUZUKI ◽  
K. SATOH ◽  
T. SATOH ◽  
...  
Keyword(s):  
Ct Scan ◽  
Three Dimensional ◽  
Helical Ct ◽  
Three Dimensional Display ◽  
Scan Data

Determining Lung Volume With Three-dimensional Reconstructions of CT Scan Data

2004 ◽  
Vol 24 (3) ◽  
pp. 323-328 ◽  
Author(s):  
Sohrab Gollogly ◽  
John T. Smith ◽  
Robert M. Campbell
Keyword(s):  
Ct Scan ◽  
Lung Volume ◽  
Three Dimensional ◽  
Scan Data

Determining Lung Volume With Three-dimensional Reconstructions of CT Scan Data

2004 ◽  
pp. 323-328
Author(s):  
Sohrab Gollogly ◽  
John T. Smith ◽  
Robert M. Campbell
Keyword(s):  
Ct Scan ◽  
Lung Volume ◽  
Three Dimensional ◽  
Scan Data

GPU-ACCELERATED INTERACTIVE VISUALIZATION OF 3D VOLUMETRIC DATA USING CUDA

2013 ◽  
Vol 13 (02) ◽  
pp. 1340003 ◽  
Author(s):  
PIYUSH KUMAR ◽  
ANUPAM AGRAWAL
Keyword(s):  
Ct Scan ◽  
Volume Rendering ◽  
Large Scale ◽  
Graphics Processing Unit ◽  
Three Dimensional ◽  
Processing Unit ◽  
Volume Data ◽  
Scan Data ◽  
Visualization Techniques ◽  
The Cost

Improving the image quality and the rendering speed have always been a challenge to the programmers involved in large scale volume rendering especially in the field of medical image processing. The paper aims to perform volume rendering using the graphics processing unit (GPU), in which, with its massively parallel capability has the potential to revolutionize this field. This work is now better with the help of GPU accelerated system. The final results would allow the doctors to diagnose and analyze the 2D computed tomography (CT) scan data using three dimensional visualization techniques. The system is used in multiple types of datasets, from 10 MB to 350 MB medical volume data. Further, the use of compute unified device architecture (CUDA) framework, a low learning curve technology, for such purpose would greatly reduce the cost involved in CT scan analysis; hence bring it to the common masses. The volume rendering has been done on Nvidia Tesla C1060 (there are 240 CUDA cores, which provides execution of data parallely) card and its performance has also been benchmarked.

Surgical Procedure Simulation via Three Dimensional Computer Aided Reconstruction of Dysplastic Canine Hips

1996 ◽  
Vol 09 (04) ◽  
pp. 152-157 ◽  
Author(s):  
C. W. Miller ◽  
H. Dobson ◽  
A. G. Binnington ◽  
S. M. Riley
Keyword(s):  
Ct Scan ◽  
Surgical Procedure ◽  
Imaging Techniques ◽  
Three Dimensional ◽  
Pelvic Osteotomy ◽  
Axial Rotation ◽  
Angle Measurements ◽  
Computer Aided ◽  
Scan Data

SummaryThe purpose of this study was to evaluate the use of three dimensional imaging techniques in veterinary orthopaedic surgery to measure hip congruity and predict changes in congruity resulting from triple pelvic osteotomies of canine hips. Preoperative, postoperative, and post-simulation measurements of congruity were obtained from eight canine hips by determination of Norberg angles from ventrodorsal pelvic radiographs (1), and lateral centre-edge (CE) angles from three dimensional (3 D) reconstructions of computed tomography (CT) scan data (2). Half of the hips were treated with a triple pelvic osteotomy with 30 degrees of axial rotation, and the other half served as approached but unoperated controls. Each measurement was performed three times by a single evaluator blinded to the identity of each hip. Lateral centre-edge angle measurements were more precise than Norberg angle measurements as determined by the calculated measurement of reliability (R = 0.78 and 0.68 respectively). Triple pelvic osteotomy resulted in an increase in congruity (as measured by lateral CE angles) of 52.2 ± 4.6 degrees compared to -3.0 ± 6.3 degrees in the control hips. The medical imaging programme used to perform the 3D reconstructions from CT scan data also allowed manipulation of the resulting preoperative 3D images to simulate on the computer screen the triple pelvic osteotomies performed on the gross specimens. Surgical procedure simulation predicted the change in congruity (as measured by lateral CE angles) of operated hips to be 43.5 ± 8.8 degrees. The images obtained by 3D reconstruction were very sensitive indicators of gross hip morphology. Visualization of structures, superimposed or surrounded by bone, was easily performed on the computer by interactive manipulation of the three dimensional CT scan reconstructions. In addition to its unique imaging capabilities, this technique appears to be a useful method for non-invasive measurement and prediction of the effects of triple pelvic osteotomy on hip congruity in dogs.Three dimensional (3D) computer aided image reconstructions were performed on tomographic scan data collected from dysplastic canine pelves before and after triple pelvic osteotomy (TPO). Descriptions of imaging capabilities and the application of lateral centre-edge angles for the determination of hip congruity are reported. Simulations performed on the computer accurately predicted the changes in congruity achieved by surgery.

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