Results 281 to 290 of about 300,325 (331)
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Bioelectrical impedance measurement: Errors and artifacts
Journal of Renal Nutrition, 1999Bioelectrical 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
B R, Di Iorio +2 more
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Artifacts and the Limits of Error
2023Abstract Artifacts are products of human agency. Though not necessarily institutional facts, artifacts are essential building blocks of our institutional reality. The main purpose of this chapter is to show that a proper metaphysical account of artifacts, in particular, of massive and intangible artifacts, is conducive to an ...
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Errors, Artifacts, and Improvements in EBSD Processing and Mapping
Microscopy and Microanalysis, 2005Electron 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
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Errors and Artifacts of Doppler Flowmeters and Their Solution
Archives of Surgery, 1977Continuous-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 W, Johnston +2 more
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Artifacts and Common Errors in Protein Gel Electrophoresis
2018In 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, R Hal, Scofield
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Somatic Growth Failure in Infants Related to Artifact and Error
Archives of Pediatrics & Adolescent Medicine, 1981Growth 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 ...
G E, Holmes, K M, Hassanein, H C, Miller
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Protocol error artifacts in MRI: Sources and remedies revisited
Radiography, 2007Abstract 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 +4 more
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Removing Channel Error Artifacts in JPEG 2000 Coded Images
2007 IEEE International Conference on Signal Processing and Communications, 2007Segmentation symbol is an error resilience feature in JPEG 2000 image coding standard. When this feature is used, not detecting the segmentation symbol at the end of a bit plane by decoder, indicates that an error has occurred within that bit plane. However, a detected and correctly decoded segmentation symbol does not guarantee that the bit plane is ...
Farzad Zargari +2 more
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Spinal cord artifacts from truncation errors during MR imaging.
Radiology, 1988The significance of linear regions of altered signal intensity that appear in sagittal magnetic resonance (MR) images along the length of the spinal cord was investigated. Examinations were performed on ten healthy volunteers and one patient with spinal cord edema. A 0.5-T or a 1.5-T MR system was used.
L M, Levy +5 more
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