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

✍ Scribed by Kwan, Alexander L. C.; Seibert, J. Anthony; Boone, John M.

• Book ID: 121685455
• Publisher: American Institute of Physics
• Year: 2006
• Tongue: English
• Weight: 299 KB
• Volume: 33
• Category: Article
• ISSN: 0094-2405
• DOI: 10.1118/1.2163388

✦ Synopsis

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 spectrum, and from 16.42 to 3.97 for the spectrum.