Results 31 to 40 of about 258 (109)

Image quality evaluation for two different positron emitters in a preclinical PET scanner

Brazilian Journal of Radiation Sciences, 2020
Positron emission tomography (PET) is widely used in preclinical trials, generating molecular images applied to biochemical, metabolic and functional investigation of organs and tissues.
Rodrigo Modesto Gadelha, Andréa Vidal Ferreira, Guilherme Albuquerque Cavalcante Souza, Juliana Batista Silva, Marcelo Mamede   +4 more
doaj   +1 more source

Reconstruction of Preclinical PET Images via Chebyshev Polynomial Approximation of the Sinogram

Applied Sciences, 2022
Over the last decades, there has been an increasing interest in dedicated preclinical imaging modalities for research in biomedicine. Especially in the case of positron emission tomography (PET), reconstructed images provide useful information of the ...
Nicholas E. Protonotarios, Athanassios S. Fokas, Alexandros Vrachliotis, Vangelis Marinakis, Nikolaos Dikaios, George A. Kastis   +5 more
doaj   +1 more source

Image-Quality Assessment for Several Positron Emitters Using the NEMA NU 4-2008 Standards in the Siemens Inveon Small-Animal PET Scanner [PDF]

Journal of Nuclear Medicine, 2010
The positron emitters (18)F, (68)Ga, (124)I, and (89)Zr are all relevant in small-animal PET. Each of these radionuclides has different positron energies and ranges and a different fraction of single photons emitted. Average positron ranges larger than the intrinsic spatial resolution of the scanner (for (124)I and (68)Ga) will deteriorate the ...
Disselhorst, J.A., Brom, M., Laverman, P., Slump, C.H., Boerman, O.C., Oyen, W.J.G., Gotthardt, M., Visser, E.P.   +7 more
openaire   +4 more sources

Correction: Doss et al. Performance Evaluation of a PET of 7T Bruker Micro-PET/MR Based on NEMA NU 4-2008 Standards. Electronics 2022, 11, 2194

Electronics, 2022
In the original publication, the Institutional Review Board Statement was not included [...]
Kishore Krishnagiri Manoj Doss, Pei En Mion, Yu-Chieh Jill Kao, Tsung-Ter Kuo, Jyh-Cheng Chen   +4 more
openaire   +1 more source

Influence of detectors efficiency normalization on small animal PET image quality

Brazilian Journal of Radiation Sciences, 2019
LabPET GE 4 (a small animal positron emission tomograph) image acquisition is done by 1536 independents channels. Differences in the rate counting of each channel must be corrected so as not compromise image quality. Equipment user manual recommends that
Mateus Gesulado Carneiro de Santana, Guilherme Cavalcante de Albuquerque Souza, Rodrigo Modesto Gadelha Gontijo, Bruno Melo Mendes, Andréa Vidal Ferreira   +4 more
doaj   +1 more source

Comparison of Imaging Characteristics of 124I PET for Determination of Optimal Energy Window on the Siemens Inveon PET

BioMed Research International, Volume 2016, Issue 1, 2016., 2016
Purpose.124I has a half‐life of 4.2 days, which makes it suitable for imaging over several days over its uptake and washout phases. However, it has a low positron branching ratio (23%), because of prompt gamma coincidence due to high‐energy γ‐photons (602 to 1,691 keV), which are emitted in cascade with positrons. Methods.
A Ram Yu, Hee-Joung Kim, Sang Moo Lim, Jin Su Kim, Guang Jia   +4 more
wiley   +1 more source

Influence of the Generator in‐Growth Time on the Final Radiochemical Purity and Stability of  99mTc Radiopharmaceuticals

Science and Technology of Nuclear Installations, Volume 2013, Issue 1, 2013., 2013
At Legnaro laboratories of the Italian National Institute for Nuclear Physics (INFN), a feasibility study has started since 2011 related to accelerated‐based direct production of 99mTc by the 100Mo(p,2n) 99mTc reaction. Both theoretical investigations and some recent preliminary irradiation tests on 100Mo‐enriched samples have pointed out that both the
L. Uccelli, A. Boschi, M. Pasquali, A. Duatti, G. Di Domenico, G. Pupillo, J. Esposito, M. Giganti, A. Taibi, M. Gambaccini, Mushtaq Ahmad   +10 more
wiley   +1 more source

Performance Measurements of a Theoretical Positron Emission Tomography Scanner Model “T2PET-NSBD” Dedicated to Plant Imaging using Monte Carlo Simulations [PDF]

E3S Web of Conferences
This work focuses on the performance measurement of a theoretical scanner with an extended Axial FOV for plant Imaging, which is based on the block detector of Naviscan PEM Flex Solo II scanners using the Geant4 Application for Tomographic Emission (GATE)
Youbi Issam, Saaidi Rahal, El Bardouni Tarek, El Hajjaji Otman   +3 more
doaj   +1 more source

NEMA NU 4-2008 and in vivo imaging performance of RAYCAN trans-PET/CT X5 small animal imaging system

Physics in Medicine & Biology, 2019
Abstract The RAYCAN Trans-PET/CT X5 is a preclinical positron emission tomography and computed tomography (PET/CT) system intended for in vivo imaging of rats and mice, featuring all-digital readout electronics for PET data acquisition.
J Teuho, C Han, L Riehakainen, A Honkaniemi, M Tirri, H Liljenbäck, J Virta, S Gu, S Liu, L Wan, M Teräs, A Roivainen, Q Xie, J Knuuti   +13 more
openaire   +3 more sources

NEMA NU 4-2008 performance and MRI-compatibility study of the edgeless preclinical PET insert: ScintoTube

Physics in Medicine & Biology
Abstract Objective. The goal of this work is to evaluate the performance of a preclinical Positron emission tomography (PET) system, named ScintoTube, which was constructed using a continuous (edgeless) LYSO:Ce scintillator.
Andrea Gonzalez-Montoro, Marta Freire, Fernando López-Berenguer, Jorge Alamo, Carlos de Alfonso, Julio Barberá, Stuart S Berr, Carlos Correcher, Laura Moliner, Joseph V Rispoli, Jennifer L Sachs, Luis F Vidal, Mark B Williams, José M Benlloch, Antonio J Gonzalez   +14 more
openaire   +4 more sources