OP21.07: Significant differences of fetal blood supply in fetuses of different weight classes demonstrated by the novel method of three-dimensional pixelwise fetal volume flow measurements (PixelFlux-method)

2012 ◽  
Vol 40 (S1) ◽  
pp. 118-118 ◽  
Author(s):  
T. M. Scholbach ◽  
N. Fersis ◽  
J. Stolle
Keyword(s):  
Blood Supply ◽  
Three Dimensional ◽  
Volume Flow ◽  
The Novel ◽  
Fetal Blood ◽  
Flow Measurements ◽  
Novel Method

Micromachined Ultrasonic Print-Head for Deposition of High-Viscosity Materials

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
J. Mark Meacham ◽  
Amanda O’Rourke ◽  
Yong Yang ◽  
Andrei G. Fedorov ◽  
F. Levent Degertekin ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Three Dimensional ◽  
High Viscosity ◽  
The Novel ◽  
Glycerol Water ◽  
Print Head ◽  
Cavity Resonances ◽  
Allowable Range ◽  
Novel Method ◽  
Manufacturing Techniques

The recent application of inkjet printing to fabrication of three-dimensional, multilayer and multimaterial parts has tested the limits of conventional printing-based additive manufacturing techniques. The novel method presented here, termed as additive manufacturing via microarray deposition (AMMD), expands the allowable range of physical properties of printed fluids to include important, high-viscosity production materials (e.g., polyurethane resins). AMMD relies on a piezoelectrically driven ultrasonic print-head that generates continuous streams of droplets from 45 μm orifices while operating in the 0.5–3.0 MHz frequency range. The device is composed of a bulk ceramic piezoelectric transducer for ultrasound generation, a reservoir for the material to be printed, and a silicon micromachined array of liquid horn structures, which make up the ejection nozzles. Unique to this new printing technique are the high frequency of operation, use of fluid cavity resonances to assist ejection, and acoustic wave focusing to generate the pressure gradient required to form and eject droplets. We present the initial characterization of a micromachined print-head for deposition of fluids that cannot be used with conventional printing-based rapid prototyping techniques. Glycerol-water mixtures with a range of properties (surface tensions of ∼58–73 mN/m and viscosities of 0.7–380 mN s/m2) were used as representative printing fluids for most investigations. Sustained ejection was observed in all cases. In addition, successful ejection of a urethane-based photopolymer resin (surface tension of ∼25–30 mN/m and viscosity of 900–3000 mN s/m2) was achieved in short duration bursts. Peaks in the ejection quality were found to correspond to predicted device resonances. Based on these results, we have demonstrated the printing of fluids that fall well outside of the accepted range for the previously introduced printing indicator. The micromachined ultrasonic print-head achieves sustained printing of fluids up to 380 mN s/m2, far above the typical printable range.

scholarly journals Novel Method for the Manufacture of Complex CFRP Parts Using FDM-based Molds

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2220
Author(s):  
Paul Bere ◽  
Calin Neamtu ◽  
Razvan Udroiu
Keyword(s):  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Acrylonitrile Butadiene Styrene ◽  
The Novel ◽  
Reinforced Polymers ◽  
Fused Deposition ◽  
Molded Parts ◽  
Deposition Modeling ◽  
Composite Tooling ◽  
Novel Method

Fibre-reinforced polymers (FRP) have attracted much interest within many industrial fields where the use of 3D printed molds can provide significant cost and time savings in the production of composite tooling. Within this paper, a novel method for the manufacture of complex-shaped FRP parts has been proposed. This paper features a new design of bike saddle, which was manufactured through the use of molds created by fused deposition modeling (FDM), of which two 3D printable materials were selected, polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS), and these molds were then chemically and thermally treated. The novel bike saddles were fabricated using carbon fiber-reinforced polymer (CFRP), by vacuum bag technology and oven curing, utilizing additive manufactured (AM) molds. Following manufacture the molded parts were subjected to a quality inspection, using non-contact three-dimensional (3D) scanning techniques, where the results were then statistically analyzed. The statistically analyzed results state that the main deviations between the CAD model and the manufactured CFRP parts were within the range of ±1 mm. Additionally, the weight of the upper part of the saddles was found to be 42 grams. The novel method is primarily intended to be used for customized products using CFRPs.

scholarly journals Plane-Based Sampling for Ray Casting Algorithm in Sequential Medical Images

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Lili Lin ◽  
Shengyong Chen ◽  
Yan Shao ◽  
Zichun Gu
Keyword(s):  
Sampling Method ◽  
Three Dimensional ◽  
Ray Casting ◽  
The Novel ◽  
Novel Method ◽  
Fast Reconstruction ◽  
Intersection Points ◽  
Sequential Images ◽  
Ray Casting Algorithm ◽  
Conventional Algorithm

This paper proposes a plane-based sampling method to improve the traditional Ray Casting Algorithm (RCA) for the fast reconstruction of a three-dimensional biomedical model from sequential images. In the novel method, the optical properties of all sampling points depend on the intersection points when a ray travels through an equidistant parallel plan cluster of the volume dataset. The results show that the method improves the rendering speed at over three times compared with the conventional algorithm and the image quality is well guaranteed.

A novel method for determining the X-ray beam angulation of the supraspinatus outlet view

2021 ◽  
pp. 028418512110438
Author(s):  
Xiaoli Zheng ◽  
Jingying Hu ◽  
Jian Xu ◽  
Zhen Wang ◽  
Zhenyu Shu ◽  
...  
Keyword(s):  
Success Rate ◽  
Pearson Correlation ◽  
Three Dimensional ◽  
The Novel ◽  
Ct Reconstruction ◽  
Beam Angle ◽  
X Ray ◽  
Horizontal Angle ◽  
Novel Method ◽  
First Time

Background Rapid and accurate quantification of the supraspinatus outlet view (SOV) is a clinical challenge. Purpose To quantify the X-ray beam angle of the SOV using the horizontal angle of the subscapular spine line (SSSL) and to further verify the feasibility of this method. Material and Methods A total of 119 patients who underwent shoulder computed tomography (CT) examination were enrolled in the retrospective study. Three-dimensional (3D) CT reconstruction was performed and manually adjusted to provide the position similar to SOV. The rotation angle of the 3D image along the long axis of the human body (marked as β) was obtained. The horizontal angle of SSSL (marked as α) was measured on the anteroposterior localizer image of shoulder CT. Pearson correlation and linear regression correlation analysis were performed. In addition, the first-time success rate between the experience-based group and the measurement-based group were compared to verify the novel method. Results We found a linear correlation between α and β (r = 0.962; P = 0.000). There was no significant correlation between the experience-based group and the measurement-based group in terms of age ( P = 0.500), sex ( P = 0.397), and side ( P = 0.710), but there was a significant statistical difference in the first success rate between the two validation groups (χ2 = 5.808a, P = 0.016). Conclusion This novel quantitative measurement method for determining the X-ray beam angle of SOV using the horizontal angle of SSSL is feasible.

APPLICATION OF ABRASIVE-WATER JET TECHNOLOGY FOR MATERIAL SCULPTURING

2010 ◽  
Vol 34 (3-4) ◽  
pp. 389-400 ◽  
Author(s):  
Przemyslaw J. Borkowski
Keyword(s):  
Water Pressure ◽  
Three Dimensional ◽  
Water Jet ◽  
The Novel ◽  
Abrasive Water Jet ◽  
Two Dimensional Image ◽  
Novel Approach ◽  
Novel Method ◽  
Experimental Testbed ◽  
Different Levels

This paper presents a novel method for the 3D sculpturing of different materials using a high-pressure abrasive water jet. The approach involves scanning an image, such as a photograph, and relating the color values of each pixel in the resulting bitmap image to the feed rate of the water jet. Keeping all other parameters such as stand-off distance and water pressure constant, different water jet feed rates will causes different levels of erosion of material. As a result, a three-dimensional sculptured surface will be realized from a two-dimensional image. The paper describes a mathematical model for shaping the material, as well as the experimental testbed used to test the novel approach. Also presented are methodical and experimental erosion results as well as a particular example of bas-relief made of metal.

scholarly journals A NEW METHOD OF SINGLE-STAGE ISLAND PLASTY BY TWO BONE AUTOGRAFTS WITH BLOOD SUPPLY IN PATIENTS WITH PSEUDOARTHROSIS OF BOTH FOREARM BONES

2010 ◽  
Vol 16 (1) ◽  
pp. 89-93
Author(s):  
R. M. Tikhilov ◽  
A. Yu. Kochish ◽  
S. P. Lushnikov
Keyword(s):  
Upper Extremity ◽  
Blood Supply ◽  
Single Stage ◽  
New Method ◽  
The Novel ◽  
Forearm Bones ◽  
Novel Method ◽  
Small Muscle

The applied topographic-anatomic studies prepared in 14 fixed and 16 unfixed preparations of upper extremity allowed to precise the details of radius blood supply with reference to possibilities of formation of bone autografts with blood supply. Due to this fact the novel method of single-stage bone plasty for pseudoarthrosis of both forearm bones was developed and successfully approved in clinic. This method proposes the formation of two periosteal-cortical grafts with blood supply and small muscle cuff in distal and middle one-thirds of radius simultaneously.

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