Results 11 to 20 of about 21,434 (259)

Initial Performance of a Prototype Small Animal PET Scanner Consisting of Long Semi-Monolithic Scintillator Detectors [PDF]

Sensors
Semi-monolithic scintillator detectors possess not only the inherent depth of interaction (DOI) encoding capability of monolithic scintillator detectors but also reduced edge effects compared to monolithic scintillator detectors.
Zhonghua Kuang, Samuel Mungai Kinyanjui, Ling Zhang, Ning Ren, Haonan Li, Zhanli Hu, Yongfeng Yang, Zheng Liu   +7 more
doaj   +2 more sources

Quality control of small animal PET scanner: The Brazilian Scenario

Brazilian Journal of Radiation Sciences, 2020
This work aims to evaluate the quality control program for small animal PET (positron emission tomography) scanners in Brazil. A questionnaire focused on type of small animal PET scanner and quality assurance program was prepared and sent to all ...
Rodrigo Modesto Gadelha Gontijo, Andréa Vidal Ferreira, Juliana Batista Silva, Marcelo Mamede   +3 more
doaj   +3 more sources

Image quality evaluation of a small animal PET scanner

Brazilian Journal of Radiation Sciences, 2020
Performance testing of small animal PET scanners is very important to ensure the high performance required for this particular type of PET scanner. In this sense, National Electrical Manufactures Association (NEMA) published its NU 4/2008 standards, a ...
Andréa Vidal Ferreira, Rodrigo Modesto Gadelha Gontijo, Guilherme Cavalcante de Albuquerque Souza, Bruno Melo Mendes, Juliana Batista da Silva, Marcelo Mamede   +5 more
doaj   +2 more sources

Development of a PET Scanner for Simultaneously Imaging Small Animals with MRI and PET [PDF]

Sensors, 2014
Recently, positron emission tomography (PET) is playing an increasingly important role in the diagnosis and staging of cancer. Combined PET and X-ray computed tomography (PET-CT) scanners are now the modality of choice in cancer treatment planning.
Christopher J Thompson, Andrew L Goertzen, Jonathan D Thiessen, Daryl Bishop, Greg Stortz, Piotr Kozlowski, Fabrice Retière, Xuezhu Zhang, Vesna Sossi   +8 more
doaj   +4 more sources

Variability of the arterial input function in small-animal dynamic PET imaging [PDF]

EJNMMI Research
Background Dynamic positron emission tomography (PET) combined with tracer kinetic modeling enables non-invasive quantification of biochemical processes.
Samuel Kuttner, Rodrigo Berzaghi, Laurence Convert, Otman Sarrhini, Roger Lecomte, Rune Sundset   +5 more
doaj   +2 more sources

Spatial resolution of a preclinical PET tomograph

Brazilian Journal of Radiation Sciences, 2021
Positron emission tomography (PET) is an important molecular image modality and its application on preclinical research has increased during last decades.
Guilherme Cavalcante de Albuquerque Souza, Rodrigo Modesto Gadelha Gontijo, Juliana Batista da Silva, Marcelo Mamede, Andréa Vidal Ferreira   +4 more
doaj   +1 more source

Improved dead-time correction for PET scanners: application to small-animal PET [PDF]

Physics in Medicine and Biology, 2013
Pile-up and dead-time are two main causes of nonlinearity in the response of a PET scanner as a function of activity in the field of view (FOV). For a given scanner and acquisition system, pile-up effects depend on the material and size of the object being imaged and on the distribution of activity inside and outside the FOV, because these factors ...
Vicente, Esther, Herraiz, Joaquin L, Espana Palomares, Samuel, Desco, M, Desco, Manuel, Vaquero, Juan Jose, Udias, Jose Manuel   +6 more
openaire   +4 more sources

Performance based on NEMA NU-4 2008 Standard of CDTN/CNEN’s Small Animal PET Scanner

Brazilian Journal of Radiation Sciences, 2022
This study aimed to evaluate the general performance of the preclinical PET scanner (LabPET Solo 4, GE) at CDTN/CNEN using the NEMA NU 4-2008 protocol.
Rodrigo Modesto Gadelha Gontijo, Andréa Vidal Ferreira, Juliana Batista da Silva, Marcelo Mamede   +3 more
doaj   +1 more source

Spatial Resolution and Sensitivity of the Inveon Small-Animal PET Scanner [PDF]

Journal of Nuclear Medicine, 2009
The Inveon small-animal PET scanner is characterized by a large, 127-mm axial length and a 161-mm crystal ring diameter. The associated high sensitivity is obtained by using all lines of response (LORs) up to the maximum ring difference (MRD) of 79, for which the most oblique LORs form acceptance angles of 38.3 degrees with transaxial planes.
Visser, E.P., Disselhorst, J.A., Brom, M., Laverman, P., Gotthardt, M., Oyen, W.J.G., Boerman, O.C.   +6 more
openaire   +3 more sources

Performance Assessment of a Preclinical PET Scanner with Pinhole Collimation by Comparison to a Coincidence-Based Small-Animal PET Scanner [PDF]

Journal of Nuclear Medicine, 2014
PET imaging of rodents is increasingly used in preclinical research, but its utility is limited by spatial resolution and signal-to-noise ratio of the images. A recently developed preclinical PET system uses a clustered-pinhole collimator, enabling high-resolution, simultaneous imaging of PET and SPECT tracers. Pinhole collimation strongly departs from
Matthew D, Walker, Marlies C, Goorden, Katherine, Dinelle, Ruud M, Ramakers, Stephan, Blinder, Maryam, Shirmohammad, Frans, van der Have, Freek J, Beekman, Vesna, Sossi   +8 more
openaire   +2 more sources