Results 41 to 50 of about 542 (127)

Desarrollo de una librería software para el análisis y validación de imágenes 2D/3D PET basado en el protocolo NEMA [PDF]

, 2022
[ES] En este trabajo de fin de grado se detalla el diseño e implementación de una librería de análisis de imagen PET (Imagen por emisión de positrones) basada en el protocolo NEMA NU-4 2008, que permite evaluar la calidad de las imágenes en base a unas ...
Poves-Carrasco, Pablo
core  

Seasonal Snow Cycles and Their Possible Influence on Seismic Velocity Changes and Eruptive Activity at Ruapehu Volcano, New Zealand

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 12, December 2024.
Abstract Understanding volcanic eruption triggers is critical toward anticipating future activity. While internal magma dynamics typically receive more attention, the influence of external processes remains less understood. In this context, we explore the relationship between seasonal snow cycles and eruptive activity at Ruapehu, New Zealand.
Alexander S. Yates, Corentin Caudron, Aurélien Mordret, Philippe Lesage, Virginie Pinel, Thomas Lecocq, Craig A. Miller, Oliver D. Lamb, Nicolas Fournier   +8 more
wiley   +1 more source

Using the NEMA NU 4 PET image quality phantom in multipinhole small-animal SPECT

, 2011
Contains fulltext : 96506.pdf (Publisher’s version ) (Open Access)Several commercial small-animal SPECT scanners using multipinhole collimation are presently available.
Boerman, O.C., Slump, Cornelis H., Jonathan A. Disselhorst, Cornelis H. Slump, Meeuwis, A.P.W., Oyen, W.J.G., Otto C. Boerman, Harteveld, A.A., Visser, E.P., Wim J.G. Oyen, Disselhorst, J.A., Antoi P.W. Meeuwis, Eric P. Visser, Anita A. Harteveld, Slump, C.H.   +14 more
core   +1 more source

Small‐scale measurement of fracture toughness of muddy marine sediments via bubble injection

Limnology and Oceanography: Methods, Volume 22, Issue 8, Page 527-535, August 2024.
Abstract Muddy marine sediments are elastic materials in which bubbles grow and worms extend their burrows by fracture. Bubble growth and burrowing behavior are dependent on the stiffness and fracture toughness (KIc) of these muds. This article describes a custom laboratory apparatus to measure the fracture toughness of muddy, cohesive sediments using ...
Anika S. Cho, Kelly M. Dorgan, Grant Lockridge   +2 more
wiley   +1 more source

A finely segmented semi‐monolithic detector tailored for high‐resolution PET

Medical Physics, Volume 51, Issue 5, Page 3421-3436, May 2024.
Abstract Background Preclinical research and organ‐dedicated applications use and require high (spatial‐)resolution positron emission tomography (PET) detectors to visualize small structures (early) and understand biological processes at a finer level of detail.
Yannick Kuhl, Florian Mueller, Stephan Naunheim, Matthias Bovelett, Janko Lambertus, David Schug, Bjoern Weissler, Eike Gegenmantel, Pierre Gebhardt, Volkmar Schulz   +9 more
wiley   +1 more source

NEMA NU-04-based performance characteristics of the LabPET-8 (TM) small animal PET scanner

, 2011
The objective of this study is to characterize the performance of the preclinical avalanche photodiode (APD)-based LabPET-8 (TM) subsystem of the fully integrated trimodality PET/SPECT/CT Triumph (TM) scanner using the National Electrical Manufacturers ...
Rameshwar Prasad, Ratib, Osman, Zaidi, Habib, Osman Ratib, Prasad, Rameshwar, Habib Zaidi   +5 more
core   +1 more source

Characterization of a preclinical PET insert in a 7 tesla MRI scanner: beyond NEMA testing [PDF]

, 2020
This study evaluates the performance of the Bruker positron emission tomograph (PET) insert combined with a BioSpec 70/30 USR magnetic resonance imaging (MRI) scanner using the manufacturer acceptance protocol and the NEMA NU 4-2008 for small animal PET.
Vande Velde, Greetje, Junge, Sven, Gonzalez, Antonio J., Cawthorne, Christopher, Deroose, Christophe M., Himmelreich, Uwe, Molinos, Cesar, Rezaei, Ahmadreza, Heidenreich, Michael, Wouters, Jens, González Martínez, Antonio Javier, Belderbos, Sarah, Nuyts, Johan, Correcher, Carlos, Cleeren, Frederik, Nannan, Lise, Gsell, Willy   +16 more
core   +1 more source

NEMA NU-4 Performance Evaluation of the IRIS PET/CT Preclinical Scanner

, 2017
This paper presents the performance assessment study of the PET component of the IRIS PET/CT according to the National Electrical Manufacturers Association NU 4-2008 standard.
Camarlinghi, Niccolo, Ferretti, Stefano, Patricia Iozzo, Nicola Belcari, Giancarlo Sportelli, Belcari, Nicola, Niccolo Camarlinghi, Alberto Del Guerra, Iozzo, Patricia, Del Guerra, Alberto, Stefano Ferretti, Sportelli, Giancarlo, Daniele Panetta, Salvadori, Piero A., Panetta, Daniele, Piero A. Salvadori   +15 more
core   +1 more source

Performance Characteristics of the Biograph Vision Quadra PET/CT system with long axial field of view using the NEMA NU 2-2018 Standard.

, 2022
Purpose: To evaluate the performance of the Biograph Vision Quadra (Siemens Healthineers) PET/CT system. This new system is based on the Siemens Biograph Vision 600, using the same silicon photomultiplier-based detectors with 3.2×3.2×20-mm lutetium ...
Rominger, Axel, Prenosil, George Amadeus, Shi, Kuangyu, Hentschel, Michael, Afshar-Oromieh, Ali, Sari, Hasan, Fürstner, Markus   +6 more
core   +1 more source

Timing performance evaluation of a dual-Axis rotational PET system according to NEMA NU 4-2008 standards: A simulation study

Biomedical Physics & Engineering Express
Abstract Introduction: Positron Emission Tomography (PET) imaging’s diagnostic accuracy is dependent on the scanner design and image quality, which is affected by several factors including the coincidence timing window (CTW).
P M C C Encarnação, P M M Correia, F M Ribeiro, J F C A Veloso   +3 more
openaire   +2 more sources