Results 21 to 30 of about 83,931 (261)
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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Direct attenuation correction for 99mTc-3PRGD2 chest SPECT lung cancer images using deep learning
Frontiers in Oncology, 2023 IntroductionThe attenuation correction technique of single photon emission computed tomography (SPECT) images is essential for early diagnosis, therapeutic evaluation, and pharmacokinetic studies of lung cancer.
Haiqun Xing +6 more
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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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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.
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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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Comparison of non-attenuation corrected and attenuation corrected myocardial perfusion SPECT
The Egyptian Journal of Radiology and Nuclear Medicine, 2016 AbstractPurposeTo assess the significance of attenuation correction on sensitivity, specificity and diagnostic accuracy of myocardial perfusion SPECT.Methods102 patients referred for myocardial perfusion imaging (MPI) were divided into two groups: 42 patients (mean age: 54.6±12.6) were enrolled in the group A, who had undergone coronary artery ...
Hasan Raza +7 more
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Attenuation correction in SPECT without attenuation map [PDF]
2011 IEEE Nuclear Science Symposium Conference Record, 2011 A method of attenuation correction in Single Photon Emission Computed Tomography (SPECT), based on emission data only is presented. The algorithm uses the well known Helgason-Ludwig consistency conditions. However, it does not attempt to find the attenuation map, but rather the correction factors for the projection data, which makes the problem simpler
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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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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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