scholarly journals Measurement of shape mapping accuracy of a flaccid membrane of a heart assist pump

2017 ◽  
Vol 66 (4) ◽  
pp. 45-59
Author(s):  
Wojciech Sulej ◽  
Krzysztof Murawski

The paper presents the research results which are a continuation of work on the use of image processing techniques to determine the membrane shape of the artificial ventricle. The studies were focused on developing a technique for measuring the accuracy of the membrane shape mapping. It is important in view of ensuring the required accuracy of determining the instantaneous stroke volume of controlled pneumatic artificial ventricular. Experiments were carried out on the models of convex, concave, and flat membranes. The purpose of the research was to obtain a numerical indicator, which will be used to evaluate the options to improve mapping techniques of the membrane shape. Keywords: accuracy measurement, membrane shape mapping, optical sensor

2017 ◽  
Vol 9 (4) ◽  
pp. 122 ◽  
Author(s):  
Wojciech Sulej ◽  
Krzysztof Murawski ◽  
Tadeusz Pustelny

The paper presents new approach to compensation the inaccuracy of shape mapping of the flaccid membrane used in the extracorporeal pneumatic heart assist pump. The original shape of the membrane was determined using specially developed DFD type method. The major problems affecting the inaccuracy of mapping the membrane result from the phenomenon of optical distortion. The invented approach to compensate for optical distortion in the process of visual measurement as well as the results obtained were presented. Full Text: PDF ReferencesK. Murawski, Method of measuring the distance using one camera, Patent Application No P.408076 (2014) - in Polish. DirectLink K. Murawski, M. Murawska, T. Pustelny, The system and method of determining the shape of the membrane pneumatic pump of extracorporeal heart assist device, Patent Application No P.414104 (2015) - in Polish. DirectLink M. Gawlikowski, T. Pustelny, R. Kustosz, "The physical parameters estimation of physiologically worked heart prosthesis", Journal de Physique IV France 137, 73 (2006). CrossRef K. Murawski, "Measurement of Membrane Displacement Using a Motionless Camera", Acta Phys. Pol. A 128(1), 10 (2015). CrossRef K. Murawski, "Measurement of Membrane Displacement with a Motionless Camera Equipped with a Fixed Focus Lens", Metrology and Measurement Systems 22(1), 69 (2015). CrossRef K. Murawski, A. Arciuch, T. Pustelny, "Study of distance range visual measurement in the new Depth From Defocus method", Phot. Lett. Poland 8, 2 (2016). CrossRef L. Grad, K. Murawski, W. Sulej, "Research to improve the accuracy of determining the stroke volume of an artificial ventricle using the wavelet transform", Proc. SPIE 10455, 1045509 (2017). CrossRef W. Sulej, K. Murawski, "The membrane shape mapping of the artificial ventricle in the actual dimensions", Proc. FedCSIS ACSIS 11, 675 (2017). CrossRef W. Sulej, L. Grad, K. Murawski, "The technique of accuracy measurement of membrane shape mapping of an artificial ventricle", Proc. SPIE 10455, 104550B (2017). CrossRef


Author(s):  
B.V.V. Prasad ◽  
E. Marietta ◽  
J.W. Burns ◽  
M.K. Estes ◽  
W. Chiu

Rotaviruses are spherical, double-shelled particles. They have been identified as a major cause of infantile gastroenteritis worldwide. In our earlier studies we determined the three-dimensional structures of double-and single-shelled simian rotavirus embedded in vitreous ice using electron cryomicroscopy and image processing techniques to a resolution of 40Å. A distinctive feature of the rotavirus structure is the presence of 132 large channels spanning across both the shells at all 5- and 6-coordinated positions of a T=13ℓ icosahedral lattice. The outer shell has 60 spikes emanating from its relatively smooth surface. The inner shell, in contrast, exhibits a bristly surface made of 260 morphological units at all local and strict 3-fold axes (Fig.l).The outer shell of rotavirus is made up of two proteins, VP4 and VP7. VP7, a glycoprotein and a neutralization antigen, is the major component. VP4 has been implicated in several important functions such as cell penetration, hemagglutination, neutralization and virulence. From our earlier studies we had proposed that the spikes correspond to VP4 and the rest of the surface is composed of VP7. Our recent structural studies, using the same techniques, with monoclonal antibodies specific to VP4 have established that surface spikes are made up of VP4.


Author(s):  
V. Deepika ◽  
T. Rajasenbagam

A brain tumor is an uncontrolled growth of abnormal brain tissue that can interfere with normal brain function. Although various methods have been developed for brain tumor classification, tumor detection and multiclass classification remain challenging due to the complex characteristics of the brain tumor. Brain tumor detection and classification are one of the most challenging and time-consuming tasks in the processing of medical images. MRI (Magnetic Resonance Imaging) is a visual imaging technique, which provides a information about the soft tissues of the human body, which helps identify the brain tumor. Proper diagnosis can prevent a patient's health to some extent. This paper presents a review of various detection and classification methods for brain tumor classification using image processing techniques.


2019 ◽  
Vol 7 (5) ◽  
pp. 165-168 ◽  
Author(s):  
Prabira Kumar Sethy ◽  
Swaraj Kumar Sahu ◽  
Nalini Kanta Barpanda ◽  
Amiya Kumar Rath

2018 ◽  
Vol 6 (6) ◽  
pp. 1493-1499
Author(s):  
Shrutika.C.Rampure . ◽  
Dr. Vindhya .P. Malagi ◽  
Dr. Ramesh Babu D.R

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