An improved method for flat-field correction of flat panel x-ray detector

Alexander L C Kwan; J Anthony Seibert; John M Boone

doi:10.1118/1.2163388

An improved method for flat-field correction of flat panel x-ray detector

Alexander L C Kwan, J Anthony Seibert, John M Boone

Radiology

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	391-393
Number of pages	3
Journal	Medical Physics
Volume	33
Issue number	2
DOIs	https://doi.org/10.1118/1.2163388
State	Published - Feb 2006

ASJC Scopus subject areas

Biophysics

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abstract = "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.",

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AB - 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.

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An improved method for flat-field correction of flat panel x-ray detector

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