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Errors and artifacts on radiographs [PDF]
Praxis medica, 2019 <p>Introduction: The process of recording a patient includes a procedure with several separate segments during work that together provide the imaging to be obtained for adequate radiological analysis. Throughout the process, it is possible to experience errors that create artifacts on X-rays which ultimately results in an inadequate ...
Simon Nikolić +4 more
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An experimental test of the accumulated copying error model of cultural mutation for Acheulean handaxe size. [PDF]
PLoS ONE, 2012 Archaeologists interested in explaining changes in artifact morphology over long time periods have found it useful to create models in which the only source of change is random and unintentional copying error, or 'cultural mutation'.
Marius Kempe +2 more
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Artifacts and errors in cross-spectrum phase noise measurements [PDF]
Metrologia, 2020 Abstract This article deals with the erratic and inconsistent phase-noise spectra often seen in low-noise oscillators, whose floor is of the order of −180 dBc/Hz or less. Such oscillators are generally measured with two-channel instruments based on averaging two simultaneous and statistically independent measures. Our new method consists
Yannick Gruson +4 more
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Optimizing Attenuation Correction in <sup>68</sup>Ga-PSMA PET Imaging Using Deep Learning and Artifact-Free Dataset Refinement. [PDF]
Diagnostics (Basel)Background/Objectives: Attenuation correction (AC) is essential for achieving quantitatively accurate PET imaging. In 68Ga-PSMA PET, however, artifacts such as respiratory motion, halo effects, and truncation errors in CT-based AC (CT-AC) images ...
Dorri Giv M +12 more
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Single-channel EOG artifact removal using fixed frequency EWT and GMETV filter. [PDF]
Sci RepPortable electroencephalogram (EEG) systems are increasingly used in healthcare due to their user-friendly and wearable design. However, accurate diagnosis can be hindered by electrooculogram (EOG) artifacts-low-frequency, high-amplitude signals caused ...
Yedukondalu J +4 more
europepmc +2 more sources
Artifacts Detection and Error Block Analysis from Broadcasted Videos [PDF]
, 2018 With the advancement of IPTV and HDTV technology, previous subtle errors in videos are now becoming more prominent because of the structure oriented and compression based artifacts. In this paper, we focus towards the development of a real-time video quality check system. Light weighted edge gradient magnitude information is incorporated to acquire the
Md. Mehedi Hasan +3 more
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Targeted principle component analysis: A new motion artifact correction approach for near-infrared spectroscopy [PDF]
Journal of Innovative Optical Health Sciences, 2014 As near-infrared spectroscopy (NIRS) broadens its application area to different age and disease groups, motion artifacts in the NIRS signal due to subject movement is becoming an important challenge. Motion artifacts generally produce signal fluctuations
Meryem A. Yücel +3 more
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A Model for Geometry-Dependent Errors in Length Artifacts
Journal of Research of the National Institute of Standards and Technology, 2012 We present a detailed model of dimensional changes in long length artifacts, such as step gauges and ball bars, due to bending under gravity. The comprehensive model is based on evaluation of the gauge points relative to the neutral bending surface. It yields the errors observed when the gauge points are located off the neutral bending surface of a bar
Daniel Sawyer +4 more
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