Results 21 to 30 of about 78,948 (263)
Positron-based attenuation correction for Positron Emission Tomography data using MCNP6 code
Journal of Radiation Research and Applied Sciences, 2016 This paper presents the Monte Carlo simulation of the attenuation correction for Positron Emission Tomography (PET) data using MCNP6 code. Two attenuation correction maps have been generated, one for correcting the attenuation effect in a homogeneous ...
M. Saeed +6 more
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 In this article, the melting ice attenuation in $C$-band radars is studied. Dual-$C$-band radar observations from the Remote Sensing of Electrification, Lightning, and Mesoscale/Microscale Processes With Adaptive Ground Observations (RELAMPAGO) campaign ...
Ivan Arias Hernandez, V. Chandrasekar
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BMC Medical Imaging, 2018 Background Attenuation correction is one of the most crucial correction factors for accurate PET data quantitation in hybrid PET/MR scanners, and computing accurate attenuation coefficient maps from MR brain acquisitions is challenging.
Jakub Baran +9 more
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Attenuation-Corrected Estimators of Reliability
Applied Psychological Measurement, 2022 The estimates of reliability are usually attenuated and deflated because the item–score correlation ([Formula: see text], Rit) embedded in the most widely used estimators is affected by several sources of mechanical error in the estimation. Empirical examples show that, in some types of datasets, the estimates by traditional alpha may be deflated by 0.
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暴雨灾害, 2021 In this paper, the observation data measured by the dual-frequency precipitation radar DPR on board the GPM satellite and the ground-based Ka/Ku dual-band radar CR of the Guangdong Longmen Observatory from April to September 2019 are matched in time and ...
Zhenyu ZENG +4 more
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A Study on the Gamma-ray Attenuation Parameters of Some Commercial Salt Samples
Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020 The purpose of this study is to calculate self-attenuation correction factors, linear (LAC) /mass attenuation coefficients (MAC), half value layers (HVL) and tenth value layers (TVL) of different brands of commercial salt samples using gamma-ray ...
Canel Eke
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Attenuation Correction of Weather Radar Reflectivity with Arbitrary Oriented Microwave Link
Advances in Meteorology, 2017 To compensate radar reflectivity for attenuation effect, a new method for attenuation correction of the radar reflectivity using arbitrary oriented microwave link (referred henceforth to as ACML) is developed and evaluated.
Peng Zhang +5 more
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Importance of Attenuation Correction (AC) for Small Animal PET Imaging
Diagnostics, 2012 The purpose of this study was to investigate whether a correction for annihilation photon attenuation in small objects such as mice is necessary. The attenuation recovery for specific organs and subcutaneous tumors was investigated.
Henrik H. El Ali +4 more
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Attenuation Correction of PET/MR Imaging [PDF]
Magnetic Resonance Imaging Clinics of North America, 2017 PET/MR is a promising multimodality imaging approach. Attenuation is by far the largest correction required for quantitative PET imaging. MR-based attenuation correction have been extensively pursued, especially for brain imaging, in the past several years. In this article, we review atlas and direct imaging MR-based PET attenuation correction methods.
Yasheng, Chen, Hongyu, An
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Journal of Medical Physics, 2016 The acquisition and processing of the Jaszczak phantom is a recommended test by the American College of Radiology for evaluation of gamma camera system performance. To produce the reconstructed phantom image for quality evaluation, attenuation correction
Krishnendu Saha +2 more
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