FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2152142562> ?p ?o ?g. }

• W2152142562 endingPage "70" @default.
• W2152142562 startingPage "1" @default.
• W2152142562 abstract "The problem of forming cross-sectional or tomographic images of the characteristics of objects arises in a variety of contexts, including medical x-ray computed tomography (CT) and nondestructive evaluation of objects in industrial inspection. In the context of emission imaging, such as positron emission tomography (PET) [1, 2], single photon emission computed tomography (SPECT) [3], and related methods used in the assay of containers of radioactive waste [4], it is useful to be able to form attenuation maps,€ tomographic images of coefficients, from which one can compute correction factors for use in emission image reconstruction. One can measure the attenuating characteristics of an object by transmitting a collection of photons through the object along various paths or rays€ and observing the fraction that pass unabsorbed. From measurements collected over a large set of rays, one can reconstruct tomographic images of the object. Such image reconstruction is the subject of this chapter.In all the above applications, the number of photons one can measure in a transmission scan is limited. In medical x-ray CT, source strength, patient motion, and absorbed dose considerations limit the total x-ray exposure. Implanted objects such as pacemakers also significantly reduce transmissivity and cause severe artifacts [5]. In industrial applications, source strength limitations, combined with the very large coefficients of metallic objects, often result in a small fraction of photons passing to the detector unabsorbed. In PET and SPECT imaging, the transmission scan only determines a nuisance€ parameter of secondary interest relative to the object's emission properties, so one would like to minimize the transmission scan duration. All the above considerations lead to €œlow-count€ transmission scans. This chapter discusses algorithms for reconstructing images from low-count transmission scans. In this context, we define low-count to mean that the mean number of photons per ray is small enough that traditional filtered-backproject on (FBP) images, or even methods based on the Gaussian approximation to the distribution of the Poisson measurements (or logarithm thereof), are inadequate. We focus the presentation in the context of PET and SPECT transmission scans, but the methods are generally applicable to all low-count transmission studies. See [6] for an excellent survey of statistical approaches for the emission reconstruction problem." @default.
• W2152142562 created "2016-06-24" @default.
• W2152142562 creator A5027207271 @default.
• W2152142562 date "2010-03-16" @default.
• W2152142562 modified "2023-10-16" @default.
• W2152142562 title "Statistical Image Reconstruction Methods for Transmission Tomography" @default.
• W2152142562 cites W1210424432 @default.
• W2152142562 cites W1554544485 @default.
• W2152142562 cites W1568048544 @default.
• W2152142562 cites W1585078554 @default.
• W2152142562 cites W1625216228 @default.
• W2152142562 cites W1647554959 @default.
• W2152142562 cites W1847641488 @default.
• W2152142562 cites W1855841690 @default.
• W2152142562 cites W1879665765 @default.
• W2152142562 cites W1913142544 @default.
• W2152142562 cites W1946200881 @default.
• W2152142562 cites W1964329032 @default.
• W2152142562 cites W1967639437 @default.
• W2152142562 cites W1969794267 @default.
• W2152142562 cites W1970820012 @default.
• W2152142562 cites W1972037630 @default.
• W2152142562 cites W1974809528 @default.
• W2152142562 cites W1976913130 @default.
• W2152142562 cites W1977152816 @default.
• W2152142562 cites W1978153144 @default.
• W2152142562 cites W1981797739 @default.
• W2152142562 cites W1987444921 @default.
• W2152142562 cites W1987649450 @default.
• W2152142562 cites W1988378363 @default.
• W2152142562 cites W1992065047 @default.
• W2152142562 cites W1992317813 @default.
• W2152142562 cites W1993680781 @default.
• W2152142562 cites W1994808901 @default.
• W2152142562 cites W1995131597 @default.
• W2152142562 cites W1996329134 @default.
• W2152142562 cites W2000359198 @default.
• W2152142562 cites W2000441297 @default.
• W2152142562 cites W2008164950 @default.
• W2152142562 cites W2014568892 @default.
• W2152142562 cites W2017363404 @default.
• W2152142562 cites W2018809250 @default.
• W2152142562 cites W2024476015 @default.
• W2152142562 cites W2024660974 @default.
• W2152142562 cites W2026289804 @default.
• W2152142562 cites W2029977244 @default.
• W2152142562 cites W2032237670 @default.
• W2152142562 cites W2034135634 @default.
• W2152142562 cites W2034272342 @default.
• W2152142562 cites W2035240801 @default.
• W2152142562 cites W2037521346 @default.
• W2152142562 cites W2038253647 @default.
• W2152142562 cites W2042635534 @default.
• W2152142562 cites W2043230024 @default.
• W2152142562 cites W2044819115 @default.
• W2152142562 cites W2045038810 @default.
• W2152142562 cites W2049009963 @default.
• W2152142562 cites W2049633694 @default.
• W2152142562 cites W2050937983 @default.
• W2152142562 cites W2051400606 @default.
• W2152142562 cites W2053742104 @default.
• W2152142562 cites W2056351725 @default.
• W2152142562 cites W2056950638 @default.
• W2152142562 cites W2060077817 @default.
• W2152142562 cites W2060308631 @default.
• W2152142562 cites W2066969767 @default.
• W2152142562 cites W2069629287 @default.
• W2152142562 cites W2074996932 @default.
• W2152142562 cites W2077667557 @default.
• W2152142562 cites W2080297732 @default.
• W2152142562 cites W2080828678 @default.
• W2152142562 cites W2084090004 @default.
• W2152142562 cites W2085149684 @default.
• W2152142562 cites W2085588751 @default.
• W2152142562 cites W2086372515 @default.
• W2152142562 cites W2090963365 @default.
• W2152142562 cites W2091826725 @default.
• W2152142562 cites W2095757123 @default.
• W2152142562 cites W2097756471 @default.
• W2152142562 cites W2098628112 @default.
• W2152142562 cites W2101455165 @default.
• W2152142562 cites W2102849784 @default.
• W2152142562 cites W2104128431 @default.
• W2152142562 cites W2106471128 @default.
• W2152142562 cites W2107829349 @default.
• W2152142562 cites W2108720883 @default.
• W2152142562 cites W2109289112 @default.
• W2152142562 cites W2110298042 @default.
• W2152142562 cites W2110733023 @default.
• W2152142562 cites W2113891902 @default.
• W2152142562 cites W2114189124 @default.
• W2152142562 cites W2115419869 @default.
• W2152142562 cites W2115816153 @default.
• W2152142562 cites W2116627107 @default.
• W2152142562 cites W2116690157 @default.
• W2152142562 cites W2117893569 @default.
• W2152142562 cites W2118254160 @default.
• W2152142562 cites W2120466466 @default.

• next