Articles with "spatial gradient" as a keyword



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Multiscale spatial gradient features for 18F-FDG PET image-guided diagnosis of Alzheimer's disease

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Published in 2019 at "Computer methods and programs in biomedicine"

DOI: 10.1016/j.cmpb.2019.105027

Abstract: BACKGROUND AND OBJECTIVE 18F-FluoroDeoxyGlucose Positron Emission Tomography (18F-FDG PET) is one of the imaging biomarkers to diagnose Alzheimer's Disease (AD). In 18F-FDG PET images, the changes of voxels' intensities reflect the differences of glucose rates,… read more here.

Keywords: gradient features; spatial gradient; 18f fdg; fdg pet ... See more keywords
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The Role of Spatial Gradient on Vertical Total Electron Content Extraction From Geodetic Very Long Baseline Interferometry Observation: Case Study CONT08 to CONT17‐L1

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Published in 2021 at "Space Weather"

DOI: 10.1029/2020sw002633

Abstract: Geodetic very long baseline interferometry (VLBI) observations are carried out, with the legacy system, using two well‐separated frequency bands in order to determine first‐order ionospheric delay corrections corresponding to the combined effect of total electron… read more here.

Keywords: vlbi; long baseline; role; geodetic long ... See more keywords
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Assessment of Intratumor Heterogeneity in Parametric Dynamic Contrast-Enhanced MR Images: A Comparative Study of Novel and Established Methods

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Published in 2021 at "Frontiers in Oncology"

DOI: 10.3389/fonc.2021.722773

Abstract: Intratumor heterogeneity is associated with aggressive disease and poor survival rates in several types of cancer. A novel method for assessing intratumor heterogeneity in medical images, named the spatial gradient method, has been developed in… read more here.

Keywords: gradient method; heterogeneity; spatial gradient; intratumor heterogeneity ... See more keywords