scholarly journals Ultrasound Modulation of Diffusive Optical Waves for Medical Imaging

2000 ◽  
Author(s):  
Daniel J. Townsend ◽  
Jonathan J. Stott ◽  
Ronald A. Roy ◽  
Charles A. DiMarzio
Keyword(s):  
Medical Imaging ◽  
Focused Ultrasound ◽  
Optical Tomography ◽  
The Body ◽  
Experimental Results ◽  
New Technique ◽  
Physical Limitation ◽  
Tissue Phantoms ◽  
Ultrasound Modulation ◽  
A New Technique

Abstract Diffusive optical tomography [DOT] is a technique for imaging within the body. While DOT provides excellent results under good conditions, there are many situations (due to anatomy or other physical limitation) in which it suffers from a “limited view” problem. In this paper we discuss our work on a new technique for combining DOT with focused ultrasound to generate virtual sources of illumination. These virtual sources help overcome the limited view problem. We present our experimental results using laboratory tissue phantoms.

A Technique for the Laboratory Determination of Recirculation in Single Needle Dialysis

1993 ◽  
Vol 16 (2) ◽  
pp. 63-70 ◽  
Author(s):  
N.A. Hoenich ◽  
P.T. Smirthwaite ◽  
C. Woffindin ◽  
P. Lancaster ◽  
T.H. Frost ◽  
...  
Keyword(s):  
Experimental Data ◽  
Flow Rate ◽  
Experimental Results ◽  
New Technique ◽  
Treatment Efficiency ◽  
Single Lumen ◽  
Theoretical Predictions ◽  
Lumen Catheter ◽  
A New Technique

Recirculation is an important factor in single needle dialysis and, if high, can compromise treatment efficiency. To provide information regarding recirculation characteristics of access devices used in single needle dialysis, we have developed a new technique to characterise recirculation and have used this to measure the recirculation of a Terumo 15G fistula needle and a VasCath SC2300 single lumen catheter. The experimentally obtained results agreed well with those established clinically (8.5 ± 2.4% and 18.4 ± 3.4%). The experimental results have also demonstrated a dependence on access type, pump speeds and fistula flow rate. A comparison of experimental data with theoretical predictions showed that the latter exceeded those measured with the largest contribution being due to the experimental fistula.

A New Tightening Technique for Threaded Fasteners

1994 ◽  
Vol 116 (2) ◽  
pp. 64-69 ◽  
Author(s):  
M. Hagiwara ◽  
N. Ohashi
Keyword(s):  
Rotation Angle ◽  
High Accuracy ◽  
Experimental Results ◽  
New Technique ◽  
Relative Rotation ◽  
Threaded Fasteners ◽  
Accuracy And Precision ◽  
Different Types ◽  
A New Technique

A new technique for tightening threaded fasteners was proposed aiming to assure the quality and the reliability in the tightening operations. The technique is based on the torque difference and the relative rotation angle in tightening and loosening process, and no preliminary experiment is required. Repeated tightening (and loosening) experiments were performed for different types of lubricant to verify the applicability of this technique. Experimental results show that the preload provided to the joint can be estimated with high accuracy and precision by this technique, and the possibility to boost the reliability of tightening control is confirmed.

In-Process Measurement of Surface Roughness in Turning by Laser Beams

1981 ◽  
Vol 103 (2) ◽  
pp. 203-209 ◽  
Author(s):  
M. Shiraishi
Keyword(s):  
Surface Roughness ◽  
Optical Method ◽  
Experimental Results ◽  
Laser Beams ◽  
New Technique ◽  
Process Measurement ◽  
Feed Direction ◽  
A New Technique

A new technique for in-process measurement of surface roughness is introduced which employs an optical method by using double laser beams. This makes it possible to detect the surface roughness not only along the circumferential path but also along the feed direction even during machining. The experimental results show that the presence of chipping and chattering can be detected sensitively along both measurements directions and the maximum roughness value is always obtainable from the reading along the feed direction.

Confirmation of a new technique for detecting slow ventricular activation on the body surface

1981 ◽  
Vol 47 ◽  
pp. 488 ◽  
Author(s):  
Michael B. Simson ◽  
David E. Euler ◽  
Eric L. Michelson ◽  
Rita Falcone ◽  
Joseph F. Spear ◽  
...  
Keyword(s):  
Body Surface ◽  
The Body ◽  
New Technique ◽  
Ventricular Activation ◽  
A New Technique

Autofluorescence maps of atherosclerotic human arteries--A new technique in medical imaging

1987 ◽  
Vol 23 (10) ◽  
pp. 1794-1797 ◽  
Author(s):  
M. Sartori ◽  
R. Sauerbrey ◽  
S. Kubodera ◽  
F. Tittel ◽  
R. Roberts ◽  
...  
Keyword(s):  
Medical Imaging ◽  
New Technique ◽  
Human Arteries ◽  
A New Technique

Internal versus External References with Respect to Perception of Stimuli on the Body Surface

1986 ◽  
Vol 63 (3) ◽  
pp. 1039-1046 ◽  
Author(s):  
Arie Cohen ◽  
Issac Lewin
Keyword(s):  
Body Surface ◽  
Stimulus Location ◽  
The Body ◽  
New Technique ◽  
Demand Characteristics ◽  
Tactile Pattern ◽  
The Subject ◽  
A New Technique ◽  
Male Subjects

Previous studies on the determinants of locus of perception of stimuli on the body have suggested that the position of the stimulus has a significant effect whether a subject perceives a tactile pattern as seen from inside or outside the body. However, it is possible that previous investigators confounded stimulus location—dorsal or frontal—and experimenter's position—behind or in front of the subject. Using 42 male subjects in a 2 × 2 design, the effects of experimenter's position and stimulus location were studied by a new technique for inferring locus of perception. Experimenter's position, rather than stimulus location, affects subjects' locus of perception. Perception of stimuli on the body involves three independent factors, (a) the demand characteristics of the experiment, (b) the manner in which an individual perceives the boundaries of his own body, and (c) an individual's ability to adopt the experimenter's perceptual standpoint.

scholarly journals In Ovo Sexing of Chicken Eggs by Virus Spectroscopy

2019 ◽  
Vol 7 (18) ◽  
pp. 3106-3109 ◽  
Author(s):  
Massimo Fioranelli ◽  
Alireza Sepehri ◽  
Maria Grazia Roccia ◽  
Chiara Rossi ◽  
Petar Vojvodic ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Medical Imaging ◽  
Chick Embryo ◽  
The Other ◽  
New Technique ◽  
In Ovo ◽  
New Methods ◽  
Shell Membrane ◽  
A New Technique ◽  
Chicken Eggs

BACKGROUND: Recently, some new methods for sexing of chicken eggs by fluorescence and Raman spectroscopy through the shell membrane have been proposed. On the other hand, in another investigation, a new virus medical imaging has been suggested. AIM: In this research, summing over these considerations, a new technique for sexing of chicken eggs by virus spectroscopy through the shell membrane is proposed. METHODS: (Please, add text …) RESULTS: (Please, add text …) CONCLUSION: It is shown that viruses outside the shell of egg can communicate with materials inside it and determine the gender of chick embryo and its evolutions.

scholarly journals MATHEMATICAL MODEL'S CHOICE REASONING AND ITS IMPLEMENTATION FOR THE EVALUATION OF THE STRENGTH OF TECHNOLOGICAL VESSELS

2017 ◽  
Vol 4 ◽  
pp. 61-72
Author(s):  
Andrii Karpash ◽  
Andrii Oliinyk
Keyword(s):  
High Risk ◽  
Technical Condition ◽  
The Body ◽  
Technical State ◽  
Multivariable Control ◽  
New Technique ◽  
Stress Determination ◽  
Regulatory Documents ◽  
A New Technique ◽  
Global Increase

In connection with the global increase in the intensity of use of working equipment related to high-risk facilities and the expiry of the service life limit, the question arises of determining the actual technical condition and forecasting the residual resource. From the analysis of the approaches to determining the technical state and on the analysis of regulatory documents, it becomes clear that the regulated methods of assessing the technical state are obsolete, such that they do not ensure the reliability of the obtained control results. A new technique for determining the actual technical state through monitoring the level of stresses in the body of high-risk objects is proposed. The new technique takes into account additional physical and mechanical parameters that affect the stress-strain state, and have not yet been used. In other words, the technique of multivariable control of stress determination was proposed. Mathematical models of the process of deformation and stress for cylindrical vessels with a spherical and conic dome operating under the action of high pressure are proposed.

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