Results 21 to 30 of about 15,561,549 (138)

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   +6 more sources

Characterization and optimization of image quality as a function of reconstruction algorithms and parameter settings in a Siemens Inveon small-animal PET scanner using the NEMA NU 4-2008 standards [PDF]

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011
Abstract The image reconstruction algorithms provided with the Siemens Inveon small-animal PET scanner are filtered backprojection (FBP), 3-dimensional reprojection (3DRP), ordered subset expectation maximization in 2 or 3 dimensions (OSEM2D/3D) and maximum a posteriori (MAP) reconstruction. This study aimed at optimizing the reconstruction parameter
Otto C. Boerman, Wim Oyen
exaly   +2 more sources

Prototype Small-Animal PET-CT Imaging System for Image-Guided Radiation Therapy [PDF]

IEEE Access, 2019
Molecular imaging is becoming essential for precision targeted radiation therapy, yet progress is hindered from a lack of integrated imaging and treatment systems.
Ekaterina Mikhaylova, Jamison Brooks, Darren M. Zuro, Farouk Nouizi, Maciej Kujawski, Srideshikan Sargur Madabushi, Jinyi Qi, Mengxi Zhang, Junie Chea, Erasmus K. Poku, Nicole Bowles, Jeffrey Y. C. Wong, John E. Shively, Paul J Yazaki, Gultekin Gulsen, Simon R. Cherry, Susanta K. Hui   +16 more
doaj   +2 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   +5 more sources

COMP Report: CPQR technical quality control guidelines for use of positron emission tomography/computed tomography in radiation treatment planning. [PDF]

J Appl Clin Med Phys, 2022
Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Klein R, Oliver M, La Russa D, Agapito J, Gaede S, Bissonnette J, Rahmim A, Uribe C.   +7 more
europepmc   +2 more sources

Multi-angle acquisition and 3D composite reconstruction for organ-targeted PET using planar detectors. [PDF]

Med Phys
Abstract Background This study investigates a multi‐angle acquisition method aimed at improving image quality in organ‐targeted PET detectors with planar detector heads. Organ‐targeted PET technologies have emerged to address limitations of conventional whole‐body PET/CT systems, such as restricted axial field‐of‐view (AFOV), limited spatial resolution,
Shahi A, Poladyan H, Anashkin E, Komarov B, Baldassi B, Rapley M, Babich A, Bubon O, Reznik A.   +8 more
europepmc   +2 more sources

Comparative analysis of image quality parameters and spatial resolution of three Small Animal PET scanner in Brazil

Brazilian Journal of Radiation Sciences, 2023
This study evaluated Image Quality (IQ) parameters and spatial resolution (SR) of Triumph® LabPET systems installed in three different Brazilian preclinical molecular imaging centers.
Rodrigo Modesto Gadelha Gontijo, Andréa Vidal Ferreira, Daniele Faria, Carlos Alberto Buchpiguel, Samuel Greggio, Gianina Venturin, Jader Costa, Juliana Silva, Marcelo Mamede   +8 more
doaj   +1 more source

Proposal of Brazilian National Program for Quality Control in the small animal PET scanners

Brazilian Journal of Radiation Sciences, 2022
In Brazil, currently there are six preclinical molecular imaging centers and seven different small animal PET systems in use. However, there is still no national specific legislation for research laboratories focused on preclinical molecular images ...
Rodrigo Modesto Gadelha Gontijo
doaj   +1 more source

Influence of image reconstruction protocols on the image quality of a small animal PET scanner using 18F and 11C

Brazilian Journal of Radiation Sciences, 2021
The small animal positron emission tomography (PET) scanner from Molecular Imaging Laboratory (LIM/CDTN) is dedicated to pre-clinical studies on new 18F and 11C-based radiopharmaceuticals and to development of novel applications for well-known ...
João Vitor do Carmo Barbosa, Rodrigo Modesto Gadelha Gontijo, Guilherme Cavalcante de Albuquerque Souza, Bruno Melo Mendes, Juliana Batista da Silva, Marcelo Mamede, Andréa Vidal Ferreira   +6 more
doaj   +1 more source

A semi‐monolithic detector providing intrinsic DOI‐encoding and sub‐200 ps CRT TOF‐capabilities for clinical PET applications

Medical Physics, Volume 49, Issue 12, Page 7469-7488, December 2022., 2022
Abstract Background Current clinical positron emission tomography (PET) systems utilize detectors where the scintillator typically contains single elements of 3–6‐mm width and about 20‐mm height. While providing good time‐of‐flight performance, this design limits the spatial resolution and causes radial astigmatism as the depth‐of‐interaction (DOI ...
Florian Mueller, Stephan Naunheim, Yannick Kuhl, David Schug, Torsten Solf, Volkmar Schulz   +5 more
wiley   +1 more source