Results 51 to 60 of about 440,067 (322)

Liquid Xenon Detectors for Positron Emission Tomography

, 2011
PET is a functional imaging technique based on detection of annihilation photons following beta decay producing positrons. In this paper, we present the concept of a new PET system for preclinical applications consisting of a ring of twelve time ...
A J Stoessl, A Miceli, A Muennich, Agostinelli S, Amaudruz P, Angle J, Aprile E, D A Bryman, Doke T, F Benard, F Retiere, J P Martin, Krishnamoorthy S, L Kurchaninov, Martin J P, Neilson R, Oberlack U G, P Amaudruz, T J Ruth, V Sossi   +19 more
core   +1 more source

Bayesian latent time joint mixed-effects model of progression in the Alzheimer's Disease Neuroimaging Initiative. [PDF]

, 2018
IntroductionWe characterize long-term disease dynamics from cognitively healthy to dementia using data from the Alzheimer's Disease Neuroimaging Initiative.MethodsWe apply a latent time joint mixed-effects model to 16 cognitive, functional, biomarker ...
Aisen, Paul S, Donohue, Michael C, Iddi, Samuel, Li, Dan, Rafii, Michael S, Thompson, Wesley K   +5 more
core   +1 more source

Exploring if Longitudinal Changes on PET Imaging Can Serve as a Biomarker for Stiff Person Syndrome Spectrum Disorders

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To identify metabolic patterns in the brain and musculoskeletal system of stiff person syndrome spectrum disorders (SPSD) patients over time using PET imaging and evaluate the impact of immune therapy on metabolic activity as a surrogate for treatment response.
Munther M. Queisi, Samantha N. Roman, Mohammad S. Sadaghiani, Lilja B. Solnes, Scott D. Newsome   +4 more
wiley   +1 more source

Spectrum and Duration of Delayed MeV-GeV Emission of Gamma-Ray Bursts in Cosmic Background Radiation Fields

, 2002
We generally analyze prompt high-energy emission above a few hundreds of GeV due to synchrotron self-Compton scattering in internal shocks. However, such photons cannot be detected because they may collide with cosmic infrared background photons, leading
Dai Z. G., MacMinn D., Protheroe R. J., T. Lu, Wijers R. A. M. J., Z. G. Dai   +5 more
core   +1 more source

Annihilation emission from young supernova remnants [PDF]

, 2010
A promising source of the positrons that contribute through annihilation to the diffuse Galactic 511keV emission is the beta-decay of unstable nuclei like 56Ni and 44Ti synthesised by massive stars and supernovae.
Aharonian, Badenes, Beacom, Blinnikov, Boehm, Borkowski, Cassam-Chenaï, Chan, Chernyshov, Churazov, Dwarkadas, Dwarkadas, Ferrière, Garcia-Segura, Garcia-Segura, Guessoum, Guessoum, Hachisu, Higdon, Iwamoto, J. Vink, Jean, Jean, Jean, Kalemci, Knödlseder, Krause, Lair, Laming, Leising, Marcaide, Martin, Martin, Milne, Nomoto, P. Jean, P. Martin, Prantzos, R. Diehl, Raymond, Reed, Renaud, Renaud, Reynolds, Roques, S. Jiraskova, Sizun, Strong, Sugerman, The, Truelove, Vedrenne, Vink, Wang, Weidenspointner, Weidenspointner, Willingale, Winkler   +57 more
core   +3 more sources

Moyamoya Disease and the Risk of Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives Moyamoya disease (MMD) is a rare cerebrovascular disorder characterized by the progressive narrowing of arteries at the base of the brain, forming abnormal collateral vascular networks. While vascular parkinsonism is noted in MMD, its link to Parkinson's disease (PD) has not been explored.
Dallah Yoo, Jeong‐Yong Shin, Rugyeom Lee, Jiwon Cheon, Ji Hun Kim, Doeun Kim, Jae‐Kyung Won, In‐Hwan Oh, Yunjong Lee, Tae‐Beom Ahn   +9 more
wiley   +1 more source

Fibroblast activation protein expression in the tumor microenvironment is crucial in survival prediction and differentiation of recurrent gliomas: a head-to-head comparison of 68Ga-FAPI-04 and 18F-FET in PET/CT imaging

EJNMMI Radiopharmacy and Chemistry
Background The precise differentiation of recurrent glioma from treatment-related changes, such as pseudoprogression or radiation necrosis, is essential for treatment planning and remains a significant challenge.
Tao Hua, Qi Huang, Zhirui Zhou, Weiyan Zhou, Jianbo Wen, Fang Xie, Ming Li, Yihui Guan, Dongxiao Zhuang   +8 more
doaj   +1 more source

New limits on $2\varepsilon$, $\varepsilon\beta^+$ and $2\beta^+$ decay of $^{136}$Ce and $^{138}$Ce with deeply purified cerium sample

, 2017
A search for double electron capture ($2\varepsilon$), electron capture with positron emission ($\varepsilon\beta^+$), and double positron emission $2\beta^+$) in $^{136}$Ce and $^{138}$Ce was realized with a 465 cm$^3$ ultra-low background HP Ge $\gamma$
Belli, P., Bernabei, R., Boiko, R. S., Cappella, F., Cerulli, R., Danevich, F. A., Incicchitti, A., Kropivyansky, B. N., Laubenstein, M., Mokina, V. M., Polischuk, O. G., Tretyak, V. I.   +11 more
core   +1 more source

CSF Levels of NPTX2 Are Associated With Less Brain Atrophy Over Time in Cognitively Unimpaired Individuals

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Neuronal pentraxin 2 (NPTX2) is a synaptic protein involved in synaptic plasticity and regulation of neuronal excitability. Lower baseline cerebrospinal fluid (CSF) NPTX2 levels have been shown to be associated with an earlier onset of mild cognitive impairment (MCI), a pre‐dementia syndrome, even after CSF Alzheimer's Disease (AD)
Juan P. Vazquez, Corinne Pettigrew, Yuxin Zhu, Claire Anderson, Guray Erus, Christos Davatzikos, Michael Miller, Abhay Moghekar, Sungtaek Oh, Chan‐Hyun Na, Marilyn Albert, Paul Worley, Anja Soldan   +12 more
wiley   +1 more source

Amelioration of Glioblastoma Multiforme via the Combination of Simulated Microgravity and Oncolytic Viral Therapy

Medical Sciences Forum, 2023
Glioblastoma multiforme (GBM) is the most common aggressive malignant primary brain tumor, afflicting approximately 3.19 per 100,000 persons in the United States with an incidence 1.6 times higher in males compared to females.
Tarek Elshourbagy, James Robert Brašić
doaj   +1 more source