Results 81 to 90 of about 7,015,125 (284)

Activity painting: PET images of freely defined activity distributions applying a novel phantom technique.

PLoS ONE, 2019
The aim of this work was to develop a novel phantom that supports the construction of highly reproducible phantoms with arbitrary activity distributions for PET imaging. It could offer a methodology for answering questions related to texture measurements
Attila Forgacs, Piroska Kallos-Balogh, Ferenc Nagy, Aron K Krizsan, Ildiko Garai, Lajos Tron, Magnus Dahlbom, Laszlo Balkay   +7 more
doaj   +1 more source

Comments on the NEMA NU 4-2008 Standard on Performance Measurement of Small Animal Positron Emission Tomographs

EJNMMI Physics, 2020
The National Electrical Manufacturers Association’s (NEMA) NU 4-2008 standard specifies methodology for evaluating the performance of small-animal PET scanners.
Patrick Hallen, David Schug, Volkmar Schulz   +2 more
doaj   +1 more source

Arterial Spin‐Labeling MRI at the Cortical‐CSF Interface: A Novel Biomarker in Alzheimer Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background/Objective Arterial spin‐labeling (ASL) MRI can measure perfusion signal adjacent to CSF spaces and may provide information regarding CSF‐adjacent water transport physiology. We developed an automated pipeline to extract cortical‐CSF interface (IF) perfusion for comparison between Alzheimer disease (AD) and cognitively normal ...
Mona Asghariahmadabad, Pouya Metanat, Michael Thomas, Luke W. Bonham, Tyson Lam, Mehmet Kurt, Hong Nguyen, Tara Ellingson, Mauro Zucchelli, Stefano Casagranda, Quin Lu, Andreas M. Rauschecker, Leo Sugrue, Luis E. Savastano, Christopher P. Hess, Kamalini Ranasinghe, S. Andrew Josephson, Bruce L. Miller, Jennifer S. Yokoyama, Gil D. Rabinovici, Peter A. Ljubenkov, Lawren VandeVrede, Kambiz Nael   +22 more
wiley   +1 more source

Artificial Intelligence in Systemic Sclerosis: Clinical Applications, Challenges, and Future Directions

Arthritis Care &Research, EarlyView.
Systemic sclerosis (SSc) is a rare autoimmune disease defined by immune dysregulation, vasculopathy, and progressive fibrosis of the skin and internal organs. Despite advances in care, major complications such as interstitial lung disease (ILD) and myocardial involvement remain the leading causes of morbidity and mortality.
Cristiana Sieiro Santos, José Miguel Sequí‐Sabater, Diego Benavent   +2 more
wiley   +1 more source

Pet-Compton system. Comparative evaluation with PET system using Monte Carlo simulation

Nucleus, 2012
Positron Emission Tomography (PET) in small animals has actually achieved spatial resolution round about 1 mm and currently there are under study different approaches to improve this spatial resolution.
Angelina Díaz García, Juan A. Rubio Rodríguez, José M. Pérez Morales, Pedro Arce Dubois, Oscar Vela Morales, Eduardo Arista Romeu   +5 more
doaj  

Noninvasive Visualization of the Activated alphavbeta3 Integrin in Cancer Patients by Positron Emission Tomography and [¹⁸F]Galacto-RGD

PLoS Medicine, 2005
Background The integrin alphavbeta3 plays an important role in angiogenesis and tumor cell metastasis, and is currently being evaluated as a target for new therapeutic approaches.
Haubner Roland, Weber Wolfgang A, Beer Ambros J, Beer Ambros J, Vabuliene Eugenija, Reim Daniel, Sarbia Mario, Becker Karl-Friedrich, Goebel Michael, Hein Rüdiger, Wester Hans-Jürgen, Kessler Horst, Schwaiger Markus   +12 more
doaj   +1 more source

Response to Deep Brain Stimulation in Three Brain Targets with Implications in Mental Disorders: A PET Study in Rats.

PLoS ONE, 2016
ObjectiveTo investigate metabolic changes in brain networks by deep brain stimulation (DBS) of the medial prefrontal cortex (mPFC), nucleus accumbens (NAcc) and dorsomedial thalamus (DM) using positron emission tomography (PET) in naïve rats.Methods43 ...
Marta Casquero-Veiga, Ravit Hadar, Javier Pascau, Christine Winter, Manuel Desco, María Luisa Soto-Montenegro   +5 more
doaj   +1 more source

H²RSPET: a 0.5 mm resolution high-sensitivity small-animal PET scanner, a simulation study. [PDF]

Phys Med Biol, 2021
Lai Y, Wang Q, Zhou S, Xie Z, Qi J, Cherry SR, Jin M, Chi Y, Du J.   +8 more
europepmc   +1 more source

PET performance evaluation of MADPET4: a small animal PET insert for a 7 T MRI scanner.

, 2017
MADPET4 is the first small animal PET insert with two layers of individually read out crystals in combination with silicon photomultiplier technology.
Omidvari, Negar;Cabello, Jorge;Topping, Geoffrey;Schneider, Florian R;Paul, Stephan;Schwaiger, Markus;Ziegler, Sibylle I
core   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source