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) |
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Pages (from-to) | 391-393 |
Number of pages | 3 |
Journal | Medical Physics |
Volume | 33 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2006 |
ASJC Scopus subject areas
- Biophysics