Results 1 to 10 of about 50,939 (221)
Multi-pinhole collimator design in different numbers of projections for brain SPECT [PDF]
Frontiers in Medicine, 2023 PurposeHigh resolution and sensitivity brain SPECT is promising for the accurate diagnosis of Alzheimer's disease (AD) and Parkinson's disease (PD). Multi-pinhole (MPH) collimators with a good performance in imaging small field-of-view (FOV) could be ...
Wenbo Huang +2 more
doaj +3 more sources
Gamma Camera Imaging with Rotating Multi-Pinhole Collimator. A Monte Carlo Feasibility Study [PDF]
Sensors, 2021 In this work, we propose and analyze a new concept of gamma ray imaging that corresponds to a gamma camera with a mobile collimator, which can be used in vivo, during surgical interventions for oncological patients for localizing regions of interest such
Victor Ilisie +4 more
doaj +3 more sources
Performance evaluation of a novel multi-pinhole collimator on triple-NaI-detector SPECT/CT for dedicated myocardial imaging [PDF]
EJNMMI Physics, 2023 Background In this study we evaluated the imaging capabilities of a novel Multi-pinhole collimator (MPH-Cardiac) specially designed for nuclear cardiology imaging on a Triple-NaI-detector based SPECT/CT system.
Aron K. Krizsan +11 more
doaj +3 more sources
A Simulation Study for Optimal Pinhole Collimator Design in Gamma Camera Systems [PDF]
Journal of Medical PhysicsBackground: The usage of a semiconductor detector with a pinhole collimator can provide high spatial resolution due to its high intrinsic resolution. However, the collimator system has low sensitivity due to the hole’s small diameter.
M. A. Ghoneim
doaj +3 more sources
Geometric Sensitivity of a Pinhole Collimator [PDF]
International Journal of Mathematics and Mathematical Sciences, 2010 Geometric sensitivity for single photon emission computerized tomography (SPECT) is given by a double integral over the detection plane. It would be useful to be able to explicitly evaluate this quantity.
Howard Jacobowitz, Scott D. Metzler
doaj +5 more sources
Multiple pinhole collimator based X-ray luminescence computed tomography. [PDF]
Biomed Opt Express, 2016 X-ray luminescence computed tomography (XLCT) is an emerging hybrid imaging modality, which is able to improve the spatial resolution of optical imaging to hundreds of micrometers for deep targets by using superfine X-ray pencil beams.
Zhang W, Zhu D, Lun M, Li C.
europepmc +6 more sources
Performance Assessment of a Channel Multi-Pinhole Collimator for Myocardial Perfusion Imaging with SPECT: A Monte Carlo Simulation [PDF]
Journal of Nuclear Research and Applications, 2023 While the conventional parallel-hole collimators are widely used in myocardial perfusion imaging (MPI) with SPECT, they are suboptimal in balancing the existing sensitivity-resolution compromise.
Z. Mohebbi, E. Saeedzadeh, H. Mahani
doaj +2 more sources
Photonics, 2022 X-ray fluorescence computed tomography (XFCT) has attracted wide attention due to its ability to simultaneously and nondestructively obtain structural and elemental distribution information within samples.
Shuang Yang +4 more
doaj +2 more sources
Practical Calibration Method for Aerial Mapping Camera Based on Multiple Pinhole Collimator
IEEE Access, 2020 Calibration of aerial mapping camera has an important influence on the applications of earth observation. However, the traditional aerial mapping cameras calibrations depend on large-scale calibration target or collimated light, moreover, it is difficult
Guoqin Yuan +5 more
doaj +2 more sources
World Journal of Nuclear Medicine, 2015 The collimator in single photon emission computed tomography (SPECT), is an important part of the imaging chain. One of the most important collimators that used in research, preclinical study, small animal, and organ imaging is the pinhole collimator ...
Jalil Islamian +3 more
doaj +3 more sources