Results 51 to 60 of about 1,134,173 (194)

Counting faces of randomly-projected polytopes when the projection radically lowers dimension [PDF]

, 2006
This paper develops asymptotic methods to count faces of random high-dimensional polytopes. Beyond its intrinsic interest, our conclusions have surprising implications - in statistics, probability, information theory, and signal processing - with ...
Donoho, David L., Tanner, Jared
core  

Simulation study of a low-cost Slide-Through PET scanner based on narrow flat panels with monolithic detectors

Frontiers in Physics
BackgroundPatient throughput in conventional PET systems is constrained by limited system sensitivity and the need for bed positioning. This study proposes a cost-effective Slide-Through PET (ST-PET) design based on two narrow monolithic LYSO detector ...
Elke Dhaenens, Boris Vervenne, Maya Abi Akl, Jens Maebe, Christian Vanhove, Stefaan Vandenberghe   +5 more
doaj   +1 more source

Channelized hotelling observers for signal detection in stack-mode reading of volumetric images on medical displays with slow response time [PDF]

, 2011
Volumetric medical images are commonly read in stack-browsing mode. However, previous studies suggest that slow temporal response of medical liquid crystal displays may degrade the diagnostic accuracy (lesion detectability) at browsing rates as low as 10
Badano, Aldo, Kimpe, Tom, Marchessoux, Cédric, Philips, Wilfried, Platisa, Ljiljana, Vansteenkiste, Ewout   +5 more
core   +2 more sources

Performance evaluation of a medium axial field-of-view sparse PET system based on flat panels of monolithic LYSO detectors: a simulation study

EJNMMI Physics
Background The combination of longer axial field-of-view (AFOV) and time-of-flight positron emission tomography (PET) has significantly improved system sensitivity and, as a result, image quality.
Maya Abi-Akl, Jens Maebe, Boris Vervenne, Othmane Bouhali, Christian Vanhove, Stefaan Vandenberghe   +5 more
doaj   +1 more source

Classification of morphologic changes in photoplethysmographic waveforms

Current Directions in Biomedical Engineering, 2016
An ever increasing number of research is examining the question to what extent physiological information beyond the blood oxygen saturation could be drawn from the photoplethysmogram.
Tigges Timo, Music Zenit, Pielmus Alexandru, Klum Michael, Feldheiser Aarne, Hunsicker Oliver, Orglmeister Reinhold   +6 more
doaj   +1 more source

Pannexin 1 Is Critically Involved in Feedback from Horizontal Cells to Cones

Frontiers in Molecular Neuroscience, 2017
Retinal horizontal cells (HCs) feed back negatively to cone photoreceptors and in that way generate the center/surround organization of bipolar cell receptive fields. The mechanism by which HCs inhibit photoreceptors is a matter of debate.
Valentina Cenedese, Wim de Graaff, Tamás Csikós, Mitali Poovayya, Georg Zoidl, Maarten Kamermans, Maarten Kamermans   +6 more
doaj   +1 more source

Optimal Deep Learning Architecture for Automated Segmentation of Cysts in OCT Images Using X-Let Transforms

Diagnostics, 2023
The retina is a thin, light-sensitive membrane with a multilayered structure found in the back of the eyeball. There are many types of retinal disorders.
Reza Darooei, Milad Nazari, Rahele Kafieh, Hossein Rabbani   +3 more
doaj   +1 more source

The Influence of Intensity Standardization on Medical Image Registration

, 2010
Acquisition-to-acquisition signal intensity variations (non-standardness) are inherent in MR images. Standardization is a post processing method for correcting inter-subject intensity variations through transforming all images from the given image gray ...
Bagci, Ulas, Bai, Li, Udupa, Jayaram K.
core   +1 more source

Smart vest for respiratory rate monitoring of COPD patients based on non-contact capacitive sensing [PDF]

, 2018
In this paper, a first approach to the design of a portable device for non-contact monitoring of respiratory rate by capacitive sensing is presented.
Barbarov-Rostán, Gerardo, Cejudo Ramos, Pilar, Márquez, Martín, Eduardo, Naranjo Hernández, David, Ortega Ruiz, Francisco, Reina Tosina, Luis Javier, Roa Romero, Laura María, Talaminos Barroso, Alejandro   +7 more
core   +1 more source

Quantitative analysis of patient motion in walk-through PET scanner and standard axial field of view pet scanner using infrared-based tracking

EJNMMI Physics
Background Long-axial field-of-view (LAFOV) Positron Emission Tomography (PET) scanners provide high sensitivity, but throughput is limited because of time-consuming patient positioning.
Rabia Aziz, Jens Maebe, Florence Marie Muller, Yves D’Asseler, Stefaan Vandenberghe   +4 more
doaj   +1 more source