Zobrazeno 1 - 10
of 9 724
pro vyhledávání: '"Ramsey, D"'
Autor:
Ramsey, D., Malaca, B., Simpson, T. T., Formanek, M., Mack, L. S., Vieira, J., Froula, D. H., Palastro, J. P.
Laser-driven free-electron lasers (LDFELs) replace magnetostatic undulators with the electromagnetic fields of a laser pulse. Because the undulator period is half the wavelength of the laser pulse, LDFELs can amplify x rays using lower electron energ
Externí odkaz:
http://arxiv.org/abs/2410.12975
Autor:
Li, Siqi, Abdelhafez, Yasser G., Nardo, Lorenzo, Cherry, Simon R., Badawi, Ramsey D., Wang, Guobao
Standard Patlak plot is widely used to describe FDG kinetics for dynamic PET imaging. Whole-body Patlak parametric imaging remains constrained due to the need for a full-time input function. Here, we demonstrate the Relative Patlak (RP) plot, which e
Externí odkaz:
http://arxiv.org/abs/2406.09720
Autor:
Xie, Huidong, Gan, Weijie, Zhou, Bo, Chen, Ming-Kai, Kulon, Michal, Boustani, Annemarie, Spencer, Benjamin A., Bayerlein, Reimund, Ji, Wei, Chen, Xiongchao, Liu, Qiong, Guo, Xueqi, Xia, Menghua, Zhou, Yinchi, Liu, Hui, Guo, Liang, An, Hongyu, Kamilov, Ulugbek S., Wang, Hanzhong, Li, Biao, Rominger, Axel, Shi, Kuangyu, Wang, Ge, Badawi, Ramsey D., Liu, Chi
Reducing scan times, radiation dose, and enhancing image quality, especially for lower-performance scanners, are critical in low-count/low-dose PET imaging. Deep learning (DL) techniques have been investigated for PET image denoising. However, existi
Externí odkaz:
http://arxiv.org/abs/2405.12996
The Dirac equation has resided among the greatest successes of modern physics since its emergence as the first quantum mechanical theory fully compatible with special relativity. This compatibility ensures that the expectation value of the velocity i
Externí odkaz:
http://arxiv.org/abs/2405.00209
Autor:
Zhu, Yansong, Li, Siqi, Xie, Zhaoheng, Leung, Edwin K., Bayerlein, Reimund, Omidvari, Negar, Abdelhafez, Yasser G., Cherry, Simon R., Qi, Jinyi, Badawi, Ramsey D., Spencer, Benjamin A., Wang, Guobao
X-ray computed tomography (CT) in PET/CT is commonly operated with a single energy, resulting in a limitation of lacking tissue composition information. Dual-energy (DE) spectral CT enables material decomposition by using two different x-ray energies
Externí odkaz:
http://arxiv.org/abs/2402.02091
Electron-positron pair creation occurs throughout the universe in the environments of extreme astrophysical objects, such as pulsar magnetospheres and black hole accretion disks. The difficulty of emulating these environments in the laboratory has mo
Externí odkaz:
http://arxiv.org/abs/2310.13840
Autor:
Palastro, J. P., Miller, K. G., Follett, R. K., Ramsey, D., Weichman, K., Arefiev, A. V., Froula, D. H.
Electrostatic waves play a critical role in nearly every branch of plasma physics from fusion to advanced accelerators, to astro, solar, and ionospheric physics. The properties of planar electrostatic waves are fully determined by the plasma conditio
Externí odkaz:
http://arxiv.org/abs/2309.06193
Autor:
Weichman, K., Miller, K. G., Malaca, B., Mori, W. B., Pierce, J. R., Ramsey, D., Vieira, J., Vranic, M., Palastro, J. P.
Numerical modeling of electromagnetic waves is an important tool for understanding the interaction of light and matter, and lies at the core of computational electromagnetics. Traditional approaches to injecting and evolving electromagnetic waves, ho
Externí odkaz:
http://arxiv.org/abs/2307.04843
Autor:
Marion, Mathieu
Publikováno v:
The Journal of Symbolic Logic, 1998 Sep 01. 63(3), 1177-1180.
Externí odkaz:
https://www.jstor.org/stable/2586732
