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Asynchronies during invasive mechanical ventilation: narrative review and update
Saavedra Santiago Nicolás,Barisich Patrick Valentino Sepúlveda,Maldonado José Benito Parra,Lumini Romina Belén,Gómez-González Alberto,Gallardo Adrián 대한중환자의학회 2022 Acute and Critical Care Vol.37 No.4
Invasive mechanical ventilation is a frequent therapy in critically ill patients in critical care units. To achieve favorable outcomes, patient and ventilator interaction must be adequate. However, many clinical situations could attempt against this principle and generate a mismatch between these two actors. These asynchronies can lead the patient to worst outcomes; because of that is vital to recognize and treat these entities as soon as possible. Early detection and recognition of the different asynchronies could favor the reduction of the days of mechanical ventilation, the days of hospital stay, and in intensive care and improve clinical results.
Integral Imaging Monitors with an Enlarged Viewing Angle
Dorado, Adria,Saavedra, Genaro,Sola-Pikabea, Jorge,Martinez-Corral, Manuel The Korea Institute of Information and Commucation 2015 Journal of information and communication convergen Vol.13 No.2
Enlarging the horizontal viewing angle is an important feature of integral imaging monitors. Thus far, the horizontal viewing angle has been enlarged in different ways, such as by changing the size of the elemental images or by tilting the lens array in the capture and reconstruction stages. However, these methods are limited by the microlenses used in the capture stage and by the fact that the images obtained cannot be easily projected into different displays. In this study, we upgrade our previously reported method, called SPOC 2.0. In particular, our new approach, which can be called SPOC 2.1, enlarges the viewing angle by increasing the density of the elemental images in the horizontal direction and by an appropriate application of our transformation and reshape algorithm. To illustrate our approach, we have calculated some high-viewing angle elemental images and displayed them on an integral imaging monitor.
Depth-of-Field Enhancement in Integral Imaging by Selective Depth-Deconvolution
Navarro, Hector,Saavedra, Genaro,Martinez-Corral, Manuel,Sjostrom, Marten,Olsson, Roger IEEE 2014 Journal of display technology Vol.10 No.3
<P>One of the major drawbacks of the integral imaging technique is its limited depth of field. Such limitation is imposed by the numerical aperture of the microlenses. In this paper, we propose a method to extend the depth of field of integral imaging systems in the reconstruction stage. The method is based on the combination of deconvolution tools and depth filtering of each elemental image using disparity map information. We demonstrate our proposal presenting digital reconstructions of a 3-D scene focused at different depths with extended depth of field.</P>
Shaded-Mask Filtering for Extended Depth-of-Field Microscopy
Escobar, Isabel,Saavedra, Genaro,Martinez-Corral, Manuel,Calatayud, Arnau,Doblas, Ana The Korea Institute of Information and Commucation 2013 Journal of information and communication convergen Vol.11 No.2
This paper proposes a new spatial filtering approach for increasing the depth-of-field (DOF) of imaging systems, which is very useful for obtaining sharp images for a wide range of axial positions of the object. Many different techniques have been reported to increase the depth of field. However the main advantage in our method is its simplicity, since we propose the use of purely absorbing beam-shaping elements, which allows a high focal depth with a minimum modification of the optical architecture. In the filter design, we have used the analogy between the axial behavior of a system with spherical aberration and the transverse impulse response of a 1D defocused system. This allowed us the design of a ring-shaded filter. Finally, experimental verification of the theoretical statements is also provided.