Matches in SemOpenAlex for { <https://semopenalex.org/work/W2016358610> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W2016358610 endingPage "59" @default.
- W2016358610 startingPage "49" @default.
- W2016358610 abstract "The Contrast Transfer Function (CTF) of an image, which modulates images taken from a Transmission Electron Microscope (TEM), is usually determined from the radial average of the power spectrum of the image (Frank, J., Three-dimensional Electron Microscopy of Macromolecular Assemblies, Oxford University Press, Oxford, 2006). The CTF is primarily defined by the defocus. If the defocus estimate is accurate enough then it is possible to demodulate the image, which is popularly known as the CTF correction. However, it is known that the radial average is somewhat attenuated if the image is astigmatic (see Fernando, K.V., Fuller, S.D., 2007. Determination of astigmatism in TEM images. Journal of Structural Biology 157, 189–200) but this distortion due to astigmatism has not been fully studied or understood up to now. We have discovered the exact mathematical relationship between the radial averages of TEM images with and without astigmatism. This relationship is determined by a zeroth order Bessel function of the first kind and hence we can exactly quantify this distortion in the radial averages of signal and power spectra of astigmatic images. The argument to this Bessel function is similar to an aberration function (without the spherical aberration term) except that the defocus parameter is replaced by the differences of the defoci in the major and minor axes of astigmatism. The ill effects due this Bessel function are twofold. Since the zeroth order Bessel function is a decaying oscillatory function, it introduces additional zeros to the radial average and it also attenuates the CTF signal in the radial averages. Using our analysis, it is possible to simulate the effects of astigmatism in radial averages by imposing Bessel functions on idealized radial averages of images which are not astigmatic. We validate our theory using astigmatic TEM images." @default.
- W2016358610 created "2016-06-24" @default.
- W2016358610 creator A5044071074 @default.
- W2016358610 date "2008-10-01" @default.
- W2016358610 modified "2023-10-16" @default.
- W2016358610 title "Radial averages of astigmatic TEM images" @default.
- W2016358610 cites W1982278617 @default.
- W2016358610 cites W1991844113 @default.
- W2016358610 cites W2002500375 @default.
- W2016358610 cites W2002896491 @default.
- W2016358610 cites W2004879912 @default.
- W2016358610 cites W2028328870 @default.
- W2016358610 cites W2047327060 @default.
- W2016358610 cites W2048380342 @default.
- W2016358610 cites W2053038074 @default.
- W2016358610 cites W2058552206 @default.
- W2016358610 cites W2061513932 @default.
- W2016358610 cites W2073949924 @default.
- W2016358610 cites W2089966385 @default.
- W2016358610 cites W2093650342 @default.
- W2016358610 cites W2117948104 @default.
- W2016358610 cites W2122633401 @default.
- W2016358610 cites W2127581985 @default.
- W2016358610 cites W2142158597 @default.
- W2016358610 cites W2148085578 @default.
- W2016358610 cites W2150938882 @default.
- W2016358610 cites W4248660383 @default.
- W2016358610 doi "https://doi.org/10.1016/j.jsb.2008.06.012" @default.
- W2016358610 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18662790" @default.
- W2016358610 hasPublicationYear "2008" @default.
- W2016358610 type Work @default.
- W2016358610 sameAs 2016358610 @default.
- W2016358610 citedByCount "10" @default.
- W2016358610 countsByYear W20163586102012 @default.
- W2016358610 countsByYear W20163586102013 @default.
- W2016358610 countsByYear W20163586102015 @default.
- W2016358610 countsByYear W20163586102017 @default.
- W2016358610 countsByYear W20163586102020 @default.
- W2016358610 countsByYear W20163586102022 @default.
- W2016358610 crossrefType "journal-article" @default.
- W2016358610 hasAuthorship W2016358610A5044071074 @default.
- W2016358610 hasConcept C107706756 @default.
- W2016358610 hasConcept C109821595 @default.
- W2016358610 hasConcept C120665830 @default.
- W2016358610 hasConcept C121332964 @default.
- W2016358610 hasConcept C126780896 @default.
- W2016358610 hasConcept C15336307 @default.
- W2016358610 hasConcept C164508769 @default.
- W2016358610 hasConcept C175231954 @default.
- W2016358610 hasConcept C194257627 @default.
- W2016358610 hasConcept C33923547 @default.
- W2016358610 hasConcept C46362747 @default.
- W2016358610 hasConcept C49040817 @default.
- W2016358610 hasConcept C70638346 @default.
- W2016358610 hasConceptScore W2016358610C107706756 @default.
- W2016358610 hasConceptScore W2016358610C109821595 @default.
- W2016358610 hasConceptScore W2016358610C120665830 @default.
- W2016358610 hasConceptScore W2016358610C121332964 @default.
- W2016358610 hasConceptScore W2016358610C126780896 @default.
- W2016358610 hasConceptScore W2016358610C15336307 @default.
- W2016358610 hasConceptScore W2016358610C164508769 @default.
- W2016358610 hasConceptScore W2016358610C175231954 @default.
- W2016358610 hasConceptScore W2016358610C194257627 @default.
- W2016358610 hasConceptScore W2016358610C33923547 @default.
- W2016358610 hasConceptScore W2016358610C46362747 @default.
- W2016358610 hasConceptScore W2016358610C49040817 @default.
- W2016358610 hasConceptScore W2016358610C70638346 @default.
- W2016358610 hasIssue "1" @default.
- W2016358610 hasLocation W20163586101 @default.
- W2016358610 hasLocation W20163586102 @default.
- W2016358610 hasOpenAccess W2016358610 @default.
- W2016358610 hasPrimaryLocation W20163586101 @default.
- W2016358610 hasRelatedWork W1990357164 @default.
- W2016358610 hasRelatedWork W1992709648 @default.
- W2016358610 hasRelatedWork W2003395176 @default.
- W2016358610 hasRelatedWork W2016358610 @default.
- W2016358610 hasRelatedWork W2019440283 @default.
- W2016358610 hasRelatedWork W2021794860 @default.
- W2016358610 hasRelatedWork W2029323398 @default.
- W2016358610 hasRelatedWork W2063500454 @default.
- W2016358610 hasRelatedWork W2086815862 @default.
- W2016358610 hasRelatedWork W2146216864 @default.
- W2016358610 hasVolume "164" @default.
- W2016358610 isParatext "false" @default.
- W2016358610 isRetracted "false" @default.
- W2016358610 magId "2016358610" @default.
- W2016358610 workType "article" @default.