Premium
An improved method for flat‐field correction of flat panel x‐ray detector
Author(s) -
Kwan Alexander L. C.,
Seibert J. Anthony,
Boone John M.
Publication year - 2006
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2163388
Subject(s) - flat panel detector , detector , optics , polynomial , field (mathematics) , mathematics , geometry , physics , mathematical analysis , pure mathematics
In this Technical Note, the effects of different flat‐field techniques are examined for a cesium iodide flat panel detector, which exhibited a slightly nonlinear exposure response. The results indicate that the variable flat‐field correction method with the appropriate polynomial fit provides excellent correction throughout the entire exposure range. The averaged normalized variation factor, used to assess the nonuniformity of the flat‐field correction, decreased from 30.76 for the fixed correction method to 4.13 for the variable flat‐field correction method with a fourth‐order polynomial fit for the 60 kVp spectrum, and from 16.42 to 3.97 for the 95 kVp spectrum.