A5101756868- Nuclear physics research studies
- Advanced Radiotherapy Techniques
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Medical Imaging Techniques and Applications
- High-Energy Particle Collisions Research
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Radiation Dose and Imaging
- Atomic and Subatomic Physics Research
- Advanced X-ray and CT Imaging
- Radiomics and Machine Learning in Medical Imaging
- Particle Accelerators and Free-Electron Lasers
- Radiopharmaceutical Chemistry and Applications
- Advanced Chemical Physics Studies
- Physiological and biochemical adaptations
- High-pressure geophysics and materials
- Aquaculture disease management and microbiota
- Quantum, superfluid, helium dynamics
- Prostate Cancer Diagnosis and Treatment
- Atomic and Molecular Physics
- Lung Cancer Diagnosis and Treatment
- Digital Radiography and Breast Imaging
Shanghai Ocean University
2025
Shanghai Dianji University
2024
Cleveland Clinic
2019-2022
UPMC Hillman Cancer Center
2019
Akron General Medical Center
2019
Thomas Jefferson National Accelerator Facility
1997-2018
UPMC Health System
2016-2018
University of Pittsburgh Medical Center
2017
Virginia Commonwealth University
2009-2012
Toronto Metropolitan University
2012
We report the first measurement using a solid polarized target of neutron electric form factor G(n)(E) via d-->(e-->,e(')n)p. was determined from beam-target asymmetry in scattering longitudinally electrons deuterated ammonia ( 15ND3). The performed Hall C at Thomas Jefferson National Accelerator Facility quasifree kinematics with polarization perpendicular to momentum transfer. were detected magnetic spectrometer coincidence neutrons large angle segmented detector. find =...
We report new measurements of the ratio electric form factor to magnetic neutron, G(n)(E)/G(n)(M), obtained via recoil polarimetry from quasielastic 2H(e-->,e(')n-->)1H reaction at Q2 values 0.45, 1.13, and 1.45 (GeV/c)(2) with relative statistical uncertainties 7.6% 8.4% two higher points, which points have never been achieved in polarization measurements.
A newly obtained sample of inclusive electron-nucleon scattering data has been analyzed for precision tests quark-hadron duality. The are in the nucleon resonance region, and span range 0. 3<Q2<5.0 (GeV/c)(2). Duality is observed both limited extended regions around prominent enhancements. Higher twist contributions to F2 structure function found be small on average, even low Q2 regime approximately 0.5 Using duality, an average scaling curve obtained. In all cases, duality appears a...
A newly obtained data sample of inclusive electron-nucleon scattering from both hydrogen and deuterium targets is analyzed. These JLab span the nucleon resonance region up to four-momentum transfers 5 (GeV/c)(2). The are found follow an average scaling curve. inclusion low-momentum transfer yields a curve resembling deep inelastic neutrino-nucleus data, suggesting sensitivity valencelike structure only.
We report values for the neutron electric to magnetic form factor ratio, ${G}_{\mathit{En}}/{G}_{\mathit{Mn}}$, deduced from measurements of neutron's recoil polarization in quasielastic $^{2}\mathrm{H}$$(\stackrel{\ensuremath{\rightarrow}}{e},{e}^{'}\stackrel{\ensuremath{\rightarrow}}{n})$$^{1}\mathrm{H}$ reaction, at three ${Q}^{2}$ 0.45, 1.13, and 1.45 (GeV/c)${}^{2}$. The data ${Q}^{2}=1.13$ (GeV/c)${}^{2}$ are first direct experimental ${G}_{\mathit{En}}$ employing degrees freedom...
Inclusive electron scattering is measured with 4.045 GeV incident beam energy from C, Fe, and Au targets. The transfers angles correspond to a kinematic range for Bjorken $x>1$ momentum ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1--7(\mathrm{GeV}/c{)}^{2}$. When analyzed in terms of the $y$-scaling function data show first time an approach scaling values initial nucleon momenta significantly greater than nuclear matter Fermi (i.e., $>0.3\mathrm{GeV}/c$).
We report the results from a systematic study of quasielastic $(e,{e}^{\ensuremath{'}}p)$ reaction on $^{12}\mathrm{C},\phantom{\rule{0.5em}{0ex}}^{56}\mathrm{Fe}$, and $^{197}\mathrm{Au}$ performed at Jefferson Lab. have measured nuclear transparency extracted spectral functions (corrected for radiation) over ${Q}^{2}$ range $0.64--3.25\phantom{\rule{0.5em}{0ex}}{(\text{GeV}∕c)}^{2}$ all three nuclei. In addition, we separated longitudinal transverse 0.64...
The ( ${e,e}^{\ensuremath{'}}p$) reaction was studied on targets of C, Fe, and Au at momentum transfers squared ${Q}^{2}$ 0.6, 1.3, 1.8, $3.3{\mathrm{GeV}}^{2}$ in a region kinematics dominated by quasifree electron-proton scattering. Missing energy missing distributions are reasonably well described plane wave impulse approximation calculations with $A$ dependent corrections that measure the attenuation final state protons.
Abstract Purpose The main aim of this study is to validate the Acuros XB dose calculation algorithm for a Varian Clinac iX linac in our clinics, and subsequently compare it with wildely used AAA algorithm. Methods materials source models both were configured by importing same measured beam data into Eclipse treatment planning system. Both algorithms validated comparing calculated on homogeneous water phantom field sizes ranging from 6 cm × 40 cm. Central axis off‐axis points different depths...
High-energy, cw electron beams at new accelerator facilities allow electromagnetic production and precision study of hypernuclear structure, we report here on the first experiment demonstrating potential $(e,{e}^{\ensuremath{'}}{K}^{+})$ reaction for spectroscopy. This is also to take advantage enhanced virtual photon flux available when electrons are scattered approximately zero degrees. The observed energy resolution was found be $\ensuremath{\approx}900\text{ }\text{...
This article presents a general procedural framework to assess the point-by-point precision in mapped dose associated with intrinsic uncertainty of deformable image registration (DIR) for any arbitrary patient.Dose is obtained via three-step process. In first step, each voxel an imaging pair, cluster points by iterative DIR procedure. second dispersion due imprecision method used compute spatial uncertainty. Two different ways quantify are presented this work. Method A consists...
Structure functions, as measured in lepton-nucleon scattering, have proven to be very useful studying the quark dynamics within nucleon. However, it is experimentally difficult separately determine longitudinal and transverse structure consequently there are substantially less data available for function particular. Here we present separated functions hydrogen deuterium at low four--momentum transfer squared, Q^2< 1 GeV^2, compare these with parton distribution parameterizations a k_T...
The ${}^{1}\mathrm{H}({e,e}^{\ensuremath{'}}{K}^{+})\ensuremath{\Lambda}$ reaction was studied as a function of the squared four-momentum transfer, ${Q}^{2}$, and virtual photon polarization, $\ensuremath{\varepsilon}$. For each four ${Q}^{2}$ settings, 0.52, 0.75, 1.00, 2.00 $(\mathrm{GeV}/c{)}^{2}$, longitudinal transverse cross sections were extracted in measurements at three polarizations. dependence ${\ensuremath{\sigma}}_{L}/{\ensuremath{\sigma}}_{T}$ ratio differs significantly from...
To quantitatively analyze the shape of eyes with high myopia and provide assistance for posterior scleral reinforcement (PSR) using high-resolution three-dimensional (3D) magnetic resonance imaging (MRI).In all, 260 134 patients were assessed in this study; 120 emmetropic volunteers enrolled as a control group. The subjects examined 3D T2-weighted CUBE sequences.The eyeballs' axial, horizontal, vertical lengths longer their volume was larger than those emmetropia. sites four recti optic...
The (3,4)(Lambda)H and (4)(Lambda)H hypernuclear bound states have been observed for the first time in kaon electroproduction on (3,4)He targets. production cross sections determined at Q(2)=0.35 GeV2 W=1.91 GeV. For either hypernucleus nuclear form factor is by comparing angular distribution of (3,4)He(e,e(')K+)(3,4)(Lambda)H processes to elementary section 1H(e,e K+)Lambda free proton, measured during same experiment.
To optimize modeling of interfractional anatomical variation during active breath-hold radiotherapy in lung cancer using principal component analysis (PCA).In 12 patients analyzed, weekly CT sessions consisting three repeat intrafraction scans were acquired with breathing control at the end normal inspiration. The gross tumor volume (GTV) and lungs delineated reviewed on first week image by physicians propagated to all other images deformable registration. PCA was used model target...
Purpose: To present a method to evaluate the dose mapping error introduced by process. In addition, apply 4D calculation process implemented in research version of commercial treatment planning system for patient case. Methods: The average accumulated finite volume should be unchanged when delivered one anatomic instance that is mapped different instance—provided tissue deformation between instances mass conserving. on image S defined as , where energy deposited contained volume. Since and...
A separation of the longitudinal and transverse 12C(e,e′p) cross sections in quasifree region has been performed parallel kinematics at Q2 0.64 1.8 GeV2 for initial proton momentum <80 MeV. The separated spectral functions Q2=0.64GeV2 show significant differences missing energy between 25 60 MeV indicating a breakdown single nucleon knockout picture. exhibit definite transfer dependence.Received 29 November 1999DOI:https://doi.org/10.1103/PhysRevC.61.061602©2000 American Physical Society
Kaon electroproduction from light nuclei and hydrogen, using 1H, 2H, 3He, 4He, carbon targets has been measured at the Thomas Jefferson National Accelerator Facility. The quasifree angular distributions of Λ Σ hyperons were determined Q2=0.35 (GeV/c)2 W=1.91 GeV. Electroproduction on hydrogen was same kinematics for reference.2 MoreReceived 14 August 2007DOI:https://doi.org/10.1103/PhysRevC.76.054004©2007 American Physical Society
The binding energy of 7ΛHe has been obtained for the first time with reaction spectroscopy using (e, e'K+) at Jefferson Lab's Hall C. A comparison among energies = 7 T l iso-triplet hypernuclei, 7ΛHe, 7ΛLi*and 7ΛBe, is made and possible charge symmetry breaking (CSB) in ΛN potential discussed. For shifts are opposite to those predicted by a recent cluster model calculation, which assumes that unexplained part difference between 4ΛH 4ΛHe, due CSB potential. Further examination light...