Results 251 to 260 of about 81,064 (299)

Preanalytical mystery: falsely elevated intact parathyroid hormone due to sampling from a grafted forearm. [PDF]

Biochem Med (Zagreb)
Tseng YW, Yeh CC, Chou CY, Chen SY, Er TK.   +4 more
europepmc   +1 more source

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Errors and Artifacts of Doppler Flowmeters and Their Solution

Archives of Surgery, 1977
Continuous-wave Doppler ultrasound flowmeters are essential instruments for the vascular surgeon. Unfortunately, when used for quantitative purposes, they yield a flow velocity waveform that is substantially in error. Current directional continuous-wave Doppler velocimeters used a O-crossing detector to convert the Doppler signal to a waveform ...
K. Wayne Johnston, Bruno C. Maruzzo, Richard S.C. Cobbold   +2 more
openaire   +3 more sources

Bioelectrical impedance measurement: Errors and artifacts

Journal of Renal Nutrition, 1999
Bioelectrical impedance analysis (BIA) allows simple noninvasive estimation of body water, and it could potentially be a very useful technique for clinical monitoring and study of abnormalities of body water. It has been shown that the total body impedance is dominated by the arm (46%) and leg (44%). The trunk, which represents an average of 46% of the
Biagio Di Iorio, Vincenzo Bellizzi, V. Terracciano   +2 more
openaire   +3 more sources

Errors, Artifacts, and Improvements in EBSD Processing and Mapping

Microscopy and Microanalysis, 2005
Electron back scatter diffraction (EBSD) mapping and indexing has rapidly come into widespread use. However, inadequate attention has been paid to the details of the method. Many of the algorithms in current use were chosen because they were the first ones that were found to work, rather than because they were optimum.
Xiaodong Tao, Alwyn Eades
openaire   +3 more sources

Somatic Growth Failure in Infants Related to Artifact and Error

Archives of Pediatrics & Adolescent Medicine, 1981
Growth failure in infants may be diagnosed erroneously because of artifact, error, or both. Assuming that all full-term infants have the same gestational age creates an artifact that is confounded further by errors in measurement of birth length. Crown-heel lengths of 77 while full-term newborns born at the University of Kansas Medical Center, Kansas ...
Grace E. Holmes, Herbert C. Miller, Khatab M. Hassanein   +2 more
openaire   +3 more sources

Segmentation errors and motion artifacts in OCT-A associated with epiretinal membranes

Canadian Journal of Ophthalmology, 2020
To explore segmentation errors, image quality, and motion-associated artifacts in eyes with idiopathic epiretinal membrane (ERM).This is a prospective observational study. We included 39 eyes affected by ERM and 40 eyes from age-matched healthy subjects. Optical coherence tomography-angiography (OCT-A) was performed in both groups.
Tina Xirou, Georgios Bontzos, Evgenia Kontou, Stamatina A. Kabanarou, Christina Garnavou-Xirou, Ilias Gkizis, Dionysios Triantafyllou   +6 more
openaire   +3 more sources

Artifacts and Common Errors in Protein Gel Electrophoresis

2018
In spite of taking precautions, some common mistakes creep into well-planned gel electrophoresis experiments. This occurs commonly in relation to calculating the cross-linking factor of a gel, polymerization temperature and time for a polyacrylamide gel, inducing aggregates in samples for electrophoresis, titrating the running buffer in electrophoresis,
Biji T. Kurien, Biji T. Kurien, Biji T. Kurien, R. Hal Scofield, R. Hal Scofield, R. Hal Scofield   +5 more
openaire   +2 more sources

Error and Artifact Detection in Video Decoding: A Temporal Method [PDF]

, 2013
Video communication via error-prone networks suffers from visibility of data impairment. Lots of research effort has been made to investigate error concealment algorithms, which almost always assume that all errors have been detected successfully. However, this assumption is not always the fact.
Daqing Zhang, Yuchun Jing, Kongjin Yang, Shenghong Li   +3 more
openaire   +1 more source

Protocol error artifacts in MRI: Sources and remedies revisited

Radiography, 2007
Abstract Purpose The objective of this article is to review the sources, effects and remedies of the artifacts that are controlled by operator variable parameters. Protocol error artifacts include susceptibility, ferromagnetic, truncation, aliasing, chemical shift, black boundary, cross-talk, partial volume averaging, and saturation artifacts.
Prabhjot Kaur, Subash Khushu, S Kaushik, R. P. Tripathi, S. Senthil Kumaran   +4 more
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Identification and effects of common errors and artifacts on the perceived quality of radiographs

Journal of the American Veterinary Medical Association, 2014
Abstract Objective—To identify common errors in film and digital radiographs provided by referring veterinarians and determine the effect of such errors on the perceived diagnostic quality of image sets. Design—Prospective study. Sample—135 sets of radiographic images acquired by referring veterinarians for client-owned small animals evaluated at a ...
James K. Roush, David S. Biller, Laura J. Armbrust, Ellie K. Nuth   +3 more
openaire   +3 more sources