backscatter


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backscatter

 [bak´skat″er]
in radiology, radiation deflected by scattering processes at angles greater than 90 degrees to the original direction of the beam of radiation.

back·scat·ter

(bak'skat-ĕr),
Secondary radiation deflected more than 90° from the primary beam. See: scattered radiation.

backscatter

Cytometry
One of two parameters measured in flow cytometry, which is detected at a 90º angle to a laser light beam and corresponds to the fluorescence of individual cells or intracellular components stained with rhodamine- or isothiocyanate-labelled monoclonal antibodies.

Nuclear physics
Electromagnetic radiation—usually understood to be photons, but also ultrasonic waves, etc.—that reflects > 90º from the source, or back in the general direction of a source.

back·scat·ter

(bak'skat-ĕr)
Deflection of diagnostic radiation at angles exceeding 90 degrees to the direction of the beam.

backscatter

in radiology, radiation deflected by scattering processes at angles greater than 90 degrees to the original direction of the beam of radiation. Important in radiotherapy when estimating surface exposure dose.
References in periodicals archive ?
Critics have long complained that the backscatters expose passengers to a small dose of ionizing radiation, which at higher levels has been linked to cancer.
Truth: The Food and Drug Administration (FDA) regulates manufacturers to ensure the safety of full-body X-ray scanning devices, which includes backscatter scanners.
The 38-kHz echo sounder was the primary source for the quantitative rockfish backscatter measurements presented here.
Both Brenner and Schauer agree that the scanners using millimetre wave technology should be considered as a first option, since they are similar in cost and functionality to the backscatter machines, but do not expose the passenger to ionizing radiation.
Backscatter could also be reduced if IT administrators programmed company mail servers to reject any email sent to an invalid user, rather than accept the mail and bounce it back to the sender's address, according to a recent NetworkWorld article.
Z Portal([R]): Cargo and vehicle screening system offers high-throughput, drive-through, multi-view screening for cars, vans, and their cargo with Z Backscatter imaging.
For more information about backscatter, please visit our Web site at http://www.
If the detector efficiency is the same for both proton groups, backscatter from the proton detector itself simply removes events from the data without any systematic effect on a.
The system's combination of transmission and Z Backscatter X-ray technologies provides superior imaging and displays the most information about the contents of the cargo.
Schechner and graduate student Nir Karpel realized that photographic images could be greatly improved by eliminating the backscatter effect.
NDC, for instance, has broken out of its 15-year role as a supplier only of gamma backscatter sensors and has come out with its first beta gauge.
Department of Defense to Use Multi-View, Z Backscatter Gantry Screening System