correction for attenuation


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correction for attenuation

[kə′rek·shən fȯr ə‚ten·yə′wā·shən]
(statistics)
A method used to adjust correlation coefficients upward because of errors of measurement when two measured variables are correlated; the errors always serve to lower the correlation coefficient as compared with what it would have been if the measurement of the two variables had been perfectly reliable.
References in periodicals archive ?
PET-CT camera, capable of recording the time of flight of photons and proposing a reconstruction into account, with its acquisition console, and capable of performing ECG gated acquisitions; the CT scanner X (CT scanner) radiation, operating in helical mode, will allow PET image correction for attenuation and broadcast, the structural location of hyperactivity / lesions observed by fusion PET-CT images and the radiological diagnosis related to clinical PET-CT of activity.
Finally, a correction for attenuation was performed for skills that were entered into several categories by subtracting the difference of the means of the assigned categories from the original value of the items.