CT Three-Dimensional (3D) Modeling Maintains Fluoroscopy Time and Contrast Volume to a Minimum in the Endovascular Treatment of Great Vessel Injury from Iatrogenic Trauma

Accidental or malicious releases in the atmosphere are more likely to occur in built-up areas, where flow and dispersion are complex. The EMERGENCIES project aims to demonstrate the operational feasibility of three-dimensional simulation as a support tool for emergency teams and first responders. The simulation domain covers a gigantic urban area around Paris, France, and uses high-resolution metric grids. It relies on the PMSS modeling system to model the flow and dispersion over this gigantic domain and on the Code_Saturne model to simulate both the close vicinity and the inside of several buildings of interest. The accelerated time is achieved through the parallel algorithms of the models. Calculations rely on a two-step approach: the flow is computed in advance using meteorological forecasts, and then on-demand release scenarios are performed. Results obtained with actual meteorological mesoscale data and realistic releases occurring both inside and outside of buildings are presented and discussed. They prove the feasibility of operational use by emergency teams in cases of atmospheric release of hazardous materials.

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Preoperative Use of CT Angiography in Infants With Coarctation of the Aorta

World Journal for Pediatric and Congenital Heart Surgery ◽

10.1177/2150135116683929 ◽

2017 ◽

Vol 8 (2) ◽

pp. 196-202 ◽

Cited By ~ 8

Author(s):

Kirsten Rose-Felker ◽

Joshua D. Robinson ◽

Carl L. Backer ◽

Cynthia K. Rigsby ◽

Osama M. Eltayeb ◽

...

Keyword(s):

Radiation Dose ◽

Surgical Approach ◽

New Technology ◽

Three Dimensional ◽

Coarctation Of The Aorta ◽

Computed Tomographic Angiography ◽

Great Vessel ◽

Z Score ◽

Computed Tomographic ◽

Tomographic Angiography

Background: Computed tomographic angiography (CTA) and echocardiography (echo) are used preoperatively in coarctation of the aorta to define arch hypoplasia and great vessel branching. We sought to determine differences in quantitative measurements, as well as surgical utility, between modalities. Methods: Infants (less than six months) with both CTA and echo prior to coarctation repair from 2004 to 2013 were included. Measurements were compared and correlated with surgical approach. Three surgeons reviewed de-identified images to predict approach and characterize utility. Computed tomographic angiography radiation dose was calculated. Results: Thirty-three patients were included. No differences existed in arch measurements between echo and CTA ( z-score: −2.59 vs −2.43; P = .47). No differences between modalities were seen for thoracotomy ( z-score: −2.48 [echo] vs −2.31 [CTA]; P = .48) or sternotomy ( z-score: −3.13 [echo] vs −3.08 [CTA]; P = .84). Computed tomographic angiography delineated great vessel branching pattern in two patients with equivocal echo findings ( P = .60). Surgeons rated CTA as far more useful than echo in understanding arch hypoplasia and great vessel branching in cases where CTA was done to resolve anatomical questions that remain after echo evaluation. Two of three surgeons were more likely to choose the surgical approach taken based on CTA (surgeon A, P = .02; surgeon B, P = .01). Radiation dose averaged 2.5 (1.6) mSv and trended down from 2.9 mSv (1.8 mSv; n = 20) to 1.6 mSv (0.5 mSv; n = 7) ( P = .06) with new technology. Conclusion: Although CTA and echo measurements of the aorta do not differ, CTA better delineates branching and surgeons strongly prefer it for three-dimensional arch anatomy. We recommend CTA for patients with anomalous arch branching patterns, diffuse or complex hypoplasia, or unusual arch morphology not fully elucidated by echo.

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Mesh-Type Three-Dimensional (3D) Printing of Human Organs and Tumors: Fast, Cost-Effective, and Personalized Anatomic Modeling of Patient-Oriented Visual Aids

Applied Sciences ◽

10.3390/app11031047 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1047

Author(s):

Jungirl Seok ◽

Sungmin Yoon ◽

Chang Hwan Ryu ◽

Junsun Ryu ◽

Seok-ki Kim ◽

...

Keyword(s):

3D Printing ◽

3D Modeling ◽

Fused Deposition Modeling ◽

Three Dimensional ◽

Tumor Location ◽

Visual Aids ◽

Surgical Specimen ◽

Personalized Care ◽

Fused Deposition ◽

Mesh Work

Although three-dimensional (3D)-printed anatomic models are not new to medicine, the high costs and lengthy production times entailed have limited their application. Our goal was developing a new and less costly 3D modeling method to depict organ-tumor relations at faster printing speeds. We have devised a method of 3D modeling using tomographic images. Coordinates are extracted at a specified interval, connecting them to create mesh-work replicas. Adjacent constructs are depicted by density variations, showing anatomic targets (i.e., tumors) in contrasting colors. An array of organ solid-tumor models was printed via a Fused Deposition Modeling 3D printer at significantly less cost ($0.05/cm3) and time expenditure (1.73 min/cm3; both, p < 0.001). Printed models helped promote visual appreciation of organ-tumor anatomy and adjacent tissues. Our mesh-work 3D thyroidal prototype reproduced glandular size/contour and tumor location, readily approximating the surgical specimen. This newly devised mesh-type 3D printing method may facilitate anatomic modeling for personalized care and improve patient awareness during informed surgical consent.

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THREE-DIMENSIONAL MODELING AS A SYSTEM FOR DISPLAYING TOTAL CHEMICAL SOIL POLLUTION

Prirodoobustrojstvo ◽

10.26897/1997-6011-2021-1-6-14 ◽

2021 ◽

pp. 6-14

Author(s):

N.P. KARPENKO ◽

◽

M.A. SHIRYAEVA

Keyword(s):

Soil Contamination ◽

Soil Pollution ◽

3D Modeling ◽

Catchment Area ◽

Three Dimensional ◽

Environmental Situation ◽

Three Dimensional Modeling ◽

Dimensional Modeling ◽

Total Soil ◽

Three Dimensional Models

The method of three-dimensional model in the system of computer modeling MathCad and Autodesk 3ds Max by categories of total soil pollution is developed. A visualization block and an analytical block have been developed which are based on calculated mathematical models for analyzing and evaluating the environmental situation, risks, and environmental safety of the territory. Three-dimensional models of relief mapping of the Pekhorka river fl oodplain are constructed by integrating them with the help of a programming environment and optimized 3D modeling programs. Three-dimensional models with total soil contamination for water body sections are constructed. On the example of some sections of the catchment area of the Pekhorka river in the Balashikha region, models with soil contamination by the total ZC indicator were created. The development of 3D modeling techniques allows you to create predictive scenarios more accurately with a high degree of detail, as well as quickly approach the solution of environmental problems. Optimization of three-dimensional modeling in the fi eld of problems related to the catchment area contributes to the further operational solution of problems of rational land use and improvement of the environmental situation.

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Determining the Optimal Fluoroscopic View during Aneurysmal Embolization with Rotation DSA

Interventional Neuroradiology ◽

10.1177/15910199970030s205 ◽

1997 ◽

Vol 3 (2_suppl) ◽

pp. 37-40

Author(s):

M. Bundo ◽

M. Negoro ◽

K. Fukasaku ◽

S. Miyachi ◽

J. Yoshida

Keyword(s):

Endovascular Treatment ◽

Cerebral Aneurysm ◽

Ct Angiography ◽

Three Dimensional ◽

Parent Artery ◽

3D Ct ◽

3D Ct Angiography

To prevent coil protrusion into the parent artery, the fluoroscopic view during coil packing is quite important. However it is not always easy to find out the optimal fluoroscopic view. We applied a rotation DSA to predict the optimal fluoroscopic view for the endovascular treatment of 4 cases with a cerebral aneurysm. Since the trajectory of the C-arm is restricted within 60 degrees only around the patient's head and the number of DSA shots are limited rather than conventional DSA, we employed three dimensional CT angiography (3D-CT angiography) to focus the range of C-arm rotation. Rotation DSA proved quite useful to determine the optimal fluoroscopic view, when combined with pre-estimation by 3D-CT angiography.

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Dynamic modeling of tunnel survey spatiotemporal data

Boletim de Ciências Geodésicas ◽

10.1590/s1982-21702014000200021 ◽

2014 ◽

Vol 20 (2) ◽

pp. 354-375

Author(s):

Xiaolong Li ◽

Jiansi Yang ◽

Bingxuan Guo ◽

Hua Liu ◽

Jun Hua

Keyword(s):

Survey Data ◽

Cross Section ◽

Cross Sections ◽

3D Modeling ◽

3D Model ◽

Three Dimensional ◽

Spatiotemporal Data ◽

Excavation Process ◽

Special Cases ◽

Time Stamps

Currently, for tunnels, the design centerline and design cross-section with time stamps are used for dynamic three-dimensional (3D) modeling. However, this approach cannot correctly reflect some qualities of tunneling or some special cases, such as landslips. Therefore, a dynamic 3D model of a tunnel based on spatiotemporal data from survey cross-sections is proposed in this paper. This model can not only playback the excavation process but also reflect qualities of a project typically missed. In this paper, a new conceptual model for dynamic 3D modeling of tunneling survey data is introduced. Some specific solutions are proposed using key corresponding technologies for coordinate transformation of cross-sections from linear engineering coordinates to global projection coordinates, data structure of files and database, and dynamic 3D modeling. A 3D tunnel TIN model was proposed using the optimized minimum direction angle algorithm. The last section implements the construction of a survey data collection, acquisition, and dynamic simulation system, which verifies the feasibility and practicality of this modeling method.

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Implementing a 3D printing service in a biomedical library

Journal of the Medical Library Association JMLA ◽

10.5195/jmla.2017.107 ◽

2017 ◽

Vol 105 (1) ◽

Cited By ~ 4

Author(s):

Verma Walker, MLIS

Keyword(s):

Problem Solving ◽

3D Printing ◽

3D Modeling ◽

Three Dimensional ◽

National Institutes Of Health ◽

3D Printer ◽

Service Model ◽

Steep Learning Curve ◽

3D Printers ◽

Creative Problem

Three-dimensional (3D) printing is opening new opportunities in biomedicine by enabling creative problem solving, faster prototyping of ideas, advances in tissue engineering, and customized patient solutions. The National Institutes of Health (NIH) Library purchased a Makerbot Replicator 2 3D printer to give scientists a chance to try out this technology. To launch the service, the library offered training, conducted a survey on service model preferences, and tracked usage and class attendance. 3D printing was very popular, with new lab equipment prototypes being the most common model type. Most survey respondents indicated they would use the service again and be willing to pay for models. There was high interest in training for 3D modeling, which has a steep learning curve. 3D printers also require significant care and repairs. NIH scientists are using 3D printing to improve their research, and it is opening new avenues for problem solving in labs. Several scientists found the 3D printer so helpful they bought one for their labs. Having a printer in a central and open location like a library can help scientists, doctors, and students learn how to use this technology in their work.

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THE DEVELOPMENT OF A THREE-DIMENSIONAL MODEL OF WWER-1000 CORE USING THE MONTE CARLO SERPENT CODE FOR NEUTRON-PHYSICAL MODELING

10.46813/2019-123-058 ◽

2019 ◽

pp. 58-61

Author(s):

V.I. Gulik ◽

O.R. Trofymenko ◽

V.V. Galchenko ◽

D.V. Budik

Keyword(s):

Monte Carlo ◽

3D Modeling ◽

Physical Modeling ◽

Three Dimensional ◽

Reactor Core ◽

Dimensional Model ◽

Three Dimensional Model ◽

Fuel Assemblies

The article presents the use of the new Monte Carlo Serpent code for 3D modeling of the WWER-1000 reactor core. Core models for the first loading of RNPP4 and the 28th loading of SUNPP3, the fuel assemblies’ models of different manufacturers were developed and presented. Considerable attention was paid to the detailed modeling of the upper, lower and side reflectors. Validation calculations of the Monte Carlo Serpent code for the WWER-1000 reactor were performed on the basis of the first RNPP4 loading. For the 28th loading of SUNPP3, albedo coefficients for radial and axial reflectors were obtained.

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URBAN MODELLING WITH TYPOLOGICAL APPROACH. CASE STUDY: MERIDA, YUCATAN, MEXICO

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-2-w5-617-2017 ◽

2017 ◽

Vol XLII-2/W5 ◽

pp. 617-620

Author(s):

A. Rodriguez

Keyword(s):

3D Modeling ◽

Three Dimensional ◽

Historical Reconstruction ◽

Colonial Era ◽

Common Features ◽

Modeling Approach ◽

Urban Modelling ◽

Typological Approach ◽

Three Dimensional Models

In three-dimensional models of urban historical reconstruction, missed contextual architecture faces difficulties because it does not have much written references in contrast to the most important monuments. This is the case of Merida, Yucatan, Mexico during the Colonial Era (1542-1810), which has lost much of its heritage. An alternative to offer a hypothetical view of these elements is a typological - parametric definition that allows a 3D modeling approach to the most common features of this heritage evidence.

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Low-Dose 3D Rotational Angiography in Measuring the Size of Intracranial Aneurysm: In Vitro Feasibility Study Using Aneurysm Phantom

Neurointervention ◽

10.5469/neuroint.2020.00437 ◽

2021 ◽

Vol 16 (1) ◽

pp. 59-63

Author(s):

Hee Jong Ki ◽

Bum-soo Kim ◽

Jun-Ki Kim ◽

Jai Ho Choi ◽

Yong Sam Shin ◽

...

Keyword(s):

Intracranial Aneurysm ◽

Endovascular Treatment ◽

Low Dose ◽

Three Dimensional ◽

3D Measurement ◽

Rotational Angiography ◽

3D Rotational Angiography ◽

Conventional Dose ◽

Noninferiority Margin

Purpose: Three-dimensional (3D) measurement of intracranial aneurysms is important in planning endovascular treatment, and 3D rotational angiography (RA) is effective in accurate measurement. The purpose of this study was to evaluate the feasibility of low dose 3D RA (5 seconds 0.10 μGy/frame) in measuring an intracranial aneurysm using an in vitro phantom.Materials and Methods: We investigated an <I>in vitro</i> 3D phantom of an intracranial aneurysm with 10 acquisitions of 3D RA with a conventional dose (5 seconds 0.36 μGy/frame) and 10 acquisitions with a low-dose (5 seconds 0.10 μGy/frame). 3D size and neck diameters of the aneurysm were measured and compared between the 2 groups (conventional and low-dose) using noninferiority statistics.Results: The aneurysm measurements were well-correlated between the 2 readers, and noninferiority in the measurement of aneurysmal size of low-dose 3D RA was demonstrated, as the upper margin of the 1-sided 97.5% confidence interval did not cross the pre-defined noninferiority margin of 0.2 mm by the 2 readers.Conclusion: Low-dose (5 seconds 0.10 μGy/frame) cerebral 3D RA is technically feasible and not inferior in in vitro 3D measurement of an intracranial aneurysm. Thus, low-dose 3D RA is promising and needs further evaluation for its clinical utility in the planning of endovascular treatment of an intracranial aneurysm.

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