backprojection


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back·pro·jec·tion

(bak'prō-jek'shŭn),
In computed tomography or other imaging techniques requiring reconstruction from multiple projections, an algorithm for calculating the contribution of each voxel of the structure to the measured ray data, to generate an image; the oldest and simplest method of image reconstruction. Compare: Fourier analysis.

back·pro·jec·tion

(bak'prŏ-jek'shŭn)
In computed tomography or other imaging techniques requiring reconstruction from multiple projections, an algorithm for calculating the contribution of each voxel of the structure to the measured ray data, to generate an image; the oldest and simplest method of image reconstruction.
References in periodicals archive ?
Their topics include memory hierarchy for multicore and many-core processors, the Cilk and Cilk++ programming languages, efficient Aho-Corasick string matching on emerging multicore architectures, sorting on a graphics processing unit (GPU), evaluating multicore processors and accelerators for dense numerical computations, and backprojection algorithms for multicore and GPU architectures.
Tomographic reconstructions can be computed by a variety of different techniques such as filtered backprojection (FBP) (Feldkamp et al, 1984; Kak and Slaney, 1988), algebraic reconstruction techniques (ART) (Gilbert, 1972; Carazo etal, 2005), geometric tomography (Gardner, 1995) or discrete tomography (Batenburg, 2005; Herman and Kuba, 2007).
A standard technique for the tomographic reconstruction of projection data is filtered backprojection (FBP) (Feldkamp et al, 1984; Kak and Slaney, 1988).
In the second algorithm, referred to as the approximate algorithm, the kernel is modified to rewrite the inversion as a convolution backprojection.
Alan Nelson, VisionGate's chairman and CEO, said, "MathStar's FPOA architecture provides the performance and flexibility to implement the computationally demanding filtering and backprojection algorithms we employ in our 3D imaging technology.
risks losing the baby--the facts of progressive conquest and colonisation, expropriation, and systematic cultural suppression, by Britain of Ireland--along with the bathwater, the inappropriate backprojection of nineteenth- and twentieth-century concepts and historical processes into the fifteen nineties' ('The Local Context for Mutabilitie's Plea', Irish University Review, Vol.
As a second example, filtered backprojection can be used in Step 1, and we can use a nonnegatively constrained least squares algorithm in Step 2.
The 3D images were reconstructed using a 3D version of the standard filtered backprojection algorithm.
Unlike the Christmas shows which have started life at the Old Rep and then toured, the Horrible Histories are too large for the historic theatre in Station Street because they need an eight-metre space for backprojection of their "Bogglevision" 3-D effects.
Nicholls' gradual self-wrapping in a huge sylvan-green train was mesmerically done, and the use of video, backprojection with shifting colours, and perfectly-timed surround sound was highly effective in this Aldeburgh Almeida Opera production.
Surtitles and helpful narrative were spot-on, but the continuous backprojections of the ebbing and flowing Rhine, much as I love the river, left me feeling slightly queasy.
Shepherd is at his best when he explains why Siraya villages were larger than others (uxorilocal marriage, age-grades and endogamy); how government control differed in Taiwan from elsewhere (see especially Appendix D, Measures of Governmental Presence); how the military was organized, a neglected aspect of Ch'ing administration; where aborigine villages were and how tax quotas changed; how Taiwan population figures can be reconstructed with the help of cultivated acreage figures and of backprojections from the superb Japanese colonial materials; and how Taiwan compares with other frontiers, North American as well as Chinese.