Mechanically-assisted 3D ultrasound scanner for Urogynecological applications: preliminary results

2020 ◽  
Author(s):  
Golafsoun Ameri ◽  
Kevin C. Barker ◽  
Derek Sham ◽  
Aaron Fenster
Keyword(s):  
3D Ultrasound ◽  
Preliminary Results ◽  
Ultrasound Scanner

2B-2 Phase Aberration Correction on a 3D Ultrasound Scanner Using RF Speckle from Moving Targets

2006 ◽  
Author(s):  
E. D. Light ◽  
S. W. Smith ◽  
N. M. Ivancevich ◽  
J. D. Dahl ◽  
H. A. Nicoletto ◽  
...  
Keyword(s):  
3D Ultrasound ◽  
Aberration Correction ◽  
Moving Targets ◽  
Phase Aberration ◽  
Ultrasound Scanner

MP17-02 DEVELOPING A PROTOTYPE FOR AN AUTOMATED, LOW-COST 3D ULTRASOUND SCANNER FOR DEDICATED UROLOGICAL APPLICATIONS

2015 ◽  
Vol 193 (4S) ◽  
Author(s):  
Ryan Gessner ◽  
Lyle Baumgarten ◽  
Paul Dayton ◽  
Robert Coward
Keyword(s):  
Low Cost ◽  
3D Ultrasound ◽  
Ultrasound Scanner

scholarly journals Color Doppler Imaging of Cardiac Catheters Using Vibrating Motors

2008 ◽  
Vol 30 (4) ◽  
pp. 247-250 ◽  
Author(s):  
Kalyan E. Reddy ◽  
Edward D. Light ◽  
Danny J. Rivera ◽  
Joseph A. Kisslo ◽  
Stephen W. Smith
Keyword(s):  
Color Doppler ◽  
Color Doppler Imaging ◽  
3D Ultrasound ◽  
Doppler Imaging ◽  
Water Tank ◽  
3D Scanner ◽  
Cardiac Catheters ◽  
Catheter Tip ◽  
The Individual ◽  
Ultrasound Scanner

A miniature motor rotating at 11,000 rpm was attached onto the proximal end of cardiac electrophysiological (EP) catheters in order to produce vibrations at the tip that were then visualized by color Doppler on ultrasound scanners. The catheter tip was imaged within a vascular graft submerged in a water tank using the Volumetrics Medical Imaging 3D scanner, the Siemens Sonoline Antares 2D scanner and the Philips ie33 3D ultrasound scanner with TEE probe. The vibrating catheter tip was visualized in each case, although results varied with the color Doppler properties of the individual scanner.

scholarly journals OP04.07: Diagnostic correlation between 2D and 3D ultrasound at 20-22 weeks in fetal evaluation. Preliminary results

2008 ◽  
Vol 32 (3) ◽  
pp. 323-323
Author(s):  
V. Borobio ◽  
S. Fernandez ◽  
J. G. Fernandez ◽  
B. Puerto ◽  
E. Gratacos
Keyword(s):  
3D Ultrasound ◽  
Preliminary Results ◽  
2D And 3D

Guidance of Cardiac Pacemaker Leads Using Real Time 3D Ultrasound: Feasibility Studies

2002 ◽  
Vol 24 (2) ◽  
pp. 119-128 ◽  
Author(s):  
Stephen W. Smith ◽  
Rebecca C. Booi ◽  
Edward D. Light ◽  
Christine L. Merdes ◽  
Patrick D. Wolf
Keyword(s):  
Real Time ◽  
Signal To Noise Ratio ◽  
Color Doppler ◽  
Cardiac Pacemaker ◽  
Feasibility Studies ◽  
3D Ultrasound ◽  
Pacemaker Lead ◽  
Electric Actuator ◽  
Pacemaker Leads ◽  
Ultrasound Scanner

We investigated the feasibility of the guidance of pacemaker lead implantation using the pacemaker lead stylet as an acoustic wave-guide combined with real time 3D ultrasound imaging. In one approach, with a 2.5 MHz transducer coupled to a stylet of a pacemaker lead, we used the stylet as a transmitter to track the vibrating tip in a 3D ultrasound scan. In another approach, we connected the stylet to a piezo-electric actuator vibrating in the range 0.5–5 kHz so that the tip of the stylet was imaged using the color Doppler feature of the real time 3D ultrasound scanner. In both approaches, tracking of the isolated stylet showed good accuracy. However, neither approach offered sufficient signal-to-noise ratio to detect the vibration within the lumen of an intact pacemaker lead.

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Cyclic Evolution of Sunspots: Gleaning New Results from Old Data

2000 ◽  
Vol 179 ◽  
pp. 163-165
Author(s):  
S. K. Solanki ◽  
M. Fligge ◽  
P. Pulkkinen ◽  
P. Hoyng
Keyword(s):  
Sunspot Number ◽  
Sunspot Cycle ◽  
Preliminary Results ◽  
Butterfly Diagram

AbstractThe records of sunspot number, sunspot areas and sunspot locations gathered over the centuries by various observatories are reanalysed with the aim of finding as yet undiscovered connections between the different parameters of the sunspot cycle and the butterfly diagram. Preliminary results of such interrelationships are presented.

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

Quantitative Measurements on the Ion Etching of TMV

1973 ◽  
Vol 31 ◽  
pp. 336-337
Author(s):  
Irwin Bendet ◽  
Nabil Rizk
Keyword(s):  
Electron Microscope ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Ion Current ◽  
Beam Diameter ◽  
Ion Etching ◽  
Preliminary Results ◽  
Quantitative Measurements ◽  
Monitoring Devices

Preliminary results reported last year on the ion etching of tobacco mosaic virus indicated that the diameter of the virus decreased more rapidly at 10KV than at 5KV, perhaps reaching a constant value before disappearing completely.In order to follow the effects of ion etching on TMV more quantitatively we have designed and built a second apparatus (Fig. 1), which incorporates monitoring devices for measuring ion current and vacuum as well as accelerating voltage. In addition, the beam diameter has been increased to approximately 1 cm., so that ten electron microscope grids can be exposed to the beam simultaneously.

Granular bainite or granular ferrite? A preliminary TEM investigation of an HSLA-100 steel

1991 ◽  
Vol 49 ◽  
pp. 584-585
Author(s):  
R. Varughese ◽  
S. W. Thompson ◽  
P. R. Howell
Keyword(s):  
Room Temperature ◽  
Transformation Products ◽  
Accurate Description ◽  
Granular Bainite ◽  
Preliminary Results ◽  
The Past ◽  
Light Micrograph ◽  
Multiphase Reaction ◽  
Detailed Nature

Ever since Habraken and Economopoulos first employed the term granular bainite to classify certain unconventional transformation products in continuously cooled steels, the term has been widely accepted and used, despite the lack of a clear consensus as to the detailed nature of the transformation products which constitute granular bainite. This paper presents the preliminary results of a TEM investigation of an 0.04 wt% C, copper-containing steel (designated HSLA-100). It is suggested that the term granular ferrite rather than granular bainite is a more accurate description of this multiphase reaction product.Figure 1 is a light micrograph of a sample which had been air-cooled from 900°C to room temperature. The microstructure is typical of that which has been termed granular bainite in the past and appears to consist of equiaxed ferritic grains together with other minor transformation products. In order to examine these structures in more detail, both continuously cooled and isothermally transformed and quenched materials have been examined with TEM. Granular bainite has been found in virtually all samples.

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