A prospective blinded comparison of second trimester fetal measurements by expert and novice readers using low-cost novice-acquired 3D volumetric ultrasound

2019 ◽  
pp. 1-9
Author(s):  
Julia R. Salinaro ◽  
Patricia J. McNally ◽  
Joao R. Nickenig Vissoci ◽  
Sarah C. Ellestad ◽  
Brian Nelson ◽  
...  
Keyword(s):  
Low Cost ◽  
Second Trimester ◽  
Expert And Novice ◽  
Novice Readers ◽  
Volumetric Ultrasound

Low-Cost Rescue Cerclage Technique in Second-Trimester Cervical Dilation With Bulging of Membranes

2021 ◽  
pp. 155335062110576
Author(s):  
Assaad Kesrouani ◽  
Sabine Esber ◽  
Bernard Nasr ◽  
Hicham Jabbour ◽  
Serges Sassine ◽  
...  
Keyword(s):  
Low Cost ◽  
Second Trimester ◽  
Cervical Dilation

Low-cost Volumetric Ultrasound by Augmentation of 2D Systems: Design and Prototype

2017 ◽  
Vol 40 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Carl D. Herickhoff ◽  
Matthew R. Morgan ◽  
Joshua S. Broder ◽  
Jeremy J. Dahl
Keyword(s):  
Low Cost ◽  
Image Acquisition ◽  
Three Dimensional ◽  
Systems Design ◽  
Region Of Interest ◽  
General System ◽  
Reconstruction Technique ◽  
2D Ultrasound ◽  
Image Orientation ◽  
Volumetric Ultrasound

Conventional two-dimensional (2D) ultrasound imaging is a powerful diagnostic tool in the hands of an experienced user, yet 2D ultrasound remains clinically underutilized and inherently incomplete, with output being very operator dependent. Volumetric ultrasound systems can more fully capture a three-dimensional (3D) region of interest, but current 3D systems require specialized transducers, are prohibitively expensive for many clinical departments, and do not register image orientation with respect to the patient; these systems are designed to provide improved workflow rather than operator independence. This work investigates whether it is possible to add volumetric 3D imaging capability to existing 2D ultrasound systems at minimal cost, providing a practical means of reducing operator dependence in ultrasound. In this paper, we present a low-cost method to make 2D ultrasound systems capable of quality volumetric image acquisition: we present the general system design and image acquisition method, including the use of a probe-mounted orientation sensor, a simple probe fixture prototype, and an offline volume reconstruction technique. We demonstrate initial results of the method, implemented using a Verasonics Vantage research scanner.

scholarly journals A new model of inexpensive portable homemade PERC Mentor (IPHOM) and its validation

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Abhishek Shukla ◽  
Gurwinder Sethi ◽  
Ananya Dutta ◽  
Puneet Aggarwal ◽  
Ayon Gupta
Keyword(s):  
Ethical Issues ◽  
Low Cost ◽  
Ball Bearings ◽  
Expert Group ◽  
Significant Difference ◽  
Hands On ◽  
Expert And Novice ◽  
Hospital Wastes ◽  
Complex Surgery ◽  
At Home

Abstract Background Percutaneous nephrolithotomy (PCNL) is a complex surgery and has a flat learning curve. Due to this and the ethical issues, trainees do not get enough hands on exposure. Virtual simulator is very expensive and bulky. Animal model requires legal clearance. This inexpensive portable homemade PERC Mentor (IPHOM) teaches all the major aspects of PCNL surgery. This article has shown the way to make this model and its validation study. Methods IPHOM can be made at home with carton box, ball bearings, LED torch and some hospital wastes. After a short demonstration of IPHOM, 14 residents and 4 urologists were given 8 tasks to perform on it followed by 15-min supervised practice exercise on day 0 and day 1. Their performance was reassessed on day 2 and 3. Response to 17 feedback points was recorded on a seven-point Likert scale. Results There was significant difference between the performance of expert and novice on day 0. Expert completed all the tasks in less time and no. of attempts. The time for tract dilatation and duration of radiation exposure were significantly less in the expert group. The performance of both expert and novice improved on day 2 and 3, but the improvement was significantly more in novice. Response to the feedback points showed no difference between expert and novice (p > .05). Conclusions We have found that training on IPHOM has improved the concept and skills of PCNL in residents. The simplicity and low cost of the model make it constructible at home.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Chromic Acid Etching of Polyethylene

1973 ◽  
Vol 31 ◽  
pp. 72-73
Author(s):  
J. D. Muzzy ◽  
R. D. Hester ◽  
J. L. Hubbard
Keyword(s):  
Chromic Acid ◽  
Low Cost ◽  
Acid Etching ◽  
Crystalline Morphology ◽  
Bulk Specimen ◽  
Morphological Studies ◽  
Perfect Form ◽  
Molecular Length ◽  
Lamellar Texture ◽  
Cost Studies

Polyethylene is one of the most important plastics produced today because of its good physical properties, ease of fabrication and low cost. Studies to improve the properties of polyethylene are leading to an understanding of its crystalline morphology. Polyethylene crystallized by evaporation from dilute solutions consists of thin crystals called lamellae. The polyethylene molecules are parallel to the thickness of the lamellae and are folded since the thickness of the lamellae is much less than the molecular length. This lamellar texture persists in less perfect form in polyethylene crystallized from the melt.Morphological studies of melt crystallized polyethylene have been limited due to the difficulty of isolating the microstructure from the bulk specimen without destroying or deforming it.

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