Results 21 to 30 of about 50,958 (240)
Xiehe Yixue Zazhi, 2023 Objective To evaluate the clinical values of preoperative 99mTc-methoxyisobutylisonitrile (MIBI) pinhole collimator duplex imaging versus parallel-hole collimator single photon emission computed tomography (SPECT)/CT tomography fusion imaging in the ...
LIU Yimin +9 more
doaj +1 more source
Nuclear Engineering and Technology, 2023 Scintillator materials are widely used in the medical and industrial fields for imaging systems using gamma cameras. In this study, image evaluation is performed by modeling a gamma camera system based on a lutetium-yttrium oxyorthosilicate (LYSO ...
Kyuseok Kim, Youngjin Lee
doaj +1 more source
Photonics, 2023 In this work, we developed and validated two novel imaging geometries of benchtop multi-pinhole X-ray fluorescence computed tomography (XFCT) systems with Geant4 Toolkit.
Binqiang Ye +5 more
doaj +1 more source
The new very small angle neutron scattering spectrometer at Laboratoire Leon Brillouin [PDF]
, 2007 The design and characteristics of the new very small angle neutron scattering spectrometer under construction at the Laboratoire Leon Brillouin is described. Its goal is to extend the range of scattering vectors magnitudes towards 2x10{-4} /A. The unique
Brulet, Annie +3 more
core +7 more sources
Absorptive pinhole collimators for ballistic Dirac fermions in graphene [PDF]
Nature Communications, 2017 AbstractBallistic electrons in solids can have mean free paths far larger than the smallest features patterned by lithography. This has allowed development and study of solid-state electron-optical devices such as beam splitters and quantum point contacts, which have informed our understanding of electron flow and interactions.
Arthur W. Barnard +5 more
openaire +4 more sources
A scanning focus nuclear microscope with multi-pinhole collimation
Physics in Medicine & Biology, 2023 Abstract Microscopic nuclear imaging down to spatial resolutions of a few hundred microns can already be achieved using low-energy gamma emitters (e.g. 125I, ∼30 keV) and a basic single micro-pinhole gamma camera. This has been applied to in vivo mouse thyroid imaging, for example.
Minh Phuong Nguyen +4 more
openaire +4 more sources
Physics Open, 2020 To improve the spatial resolution in near-infrared-ray computed tomography (NIR-CT), a first-generation scanner was constructed using the wavelength range of 700–900 nm, called the first living-body window.
Eiichi Sato +8 more
doaj +1 more source
Analytical Modelling and Simulation of Single and Double Cone Pinholes for Real-Time In-Body Tracking of an HDR Brachytherapy Source [PDF]
, 2016 © 2016 IEEE. The choice of pinhole geometry is a critical factor in the performance of pinhole-collimator-based source tracking systems for brachytherapy QA.
Alnaghy, S +7 more
core +1 more source
Performance evaluation of a novel multi-pinhole collimator for dopamine transporter SPECT
Physics in Medicine and Biology, 2020 There is a tradeoff between spatial resolution and count sensitivity in SPECT with conventional collimators. Multi-pinhole (MPH) collimator technology has potential for concurrent improvement of resolution and sensitivity in clinical SPECT of ‘small ...
K. Tecklenburg +7 more
semanticscholar +1 more source
Evaluation of Thyroid Uptake of 99mTc Pertechnetate Using Gamma Camera and Dose Calibrator Methods in the Sudanese Population [PDF]
International Journal of Biomedicine, 2022 Background: Estimation of the thyroid gland volume is generally considered important in several pathologic situations. The main objective of this study was to evaluate the thyroid uptake (TU) of 99mTcO4- in Sudanese people, using gamma camera and dose ...
Zobai Tageldin Yousif +8 more
doaj +1 more source