1 / 8

Optimized THL-Masks for the Medipix-Quad 04. 05. 2006 Frank Nachtrab

Optimized THL-Masks for the Medipix-Quad 04. 05. 2006 Frank Nachtrab frank.nachtrab@physik.uni-erlangen.de Physikalisches Institut, Abt. IV Friedrich-Alexander-Universität Erlangen. CT with the Quad. Ringartefacts in CT.

beata
Télécharger la présentation

Optimized THL-Masks for the Medipix-Quad 04. 05. 2006 Frank Nachtrab

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Optimized THL-Masks for the Medipix-Quad 04. 05. 2006 Frank Nachtrab frank.nachtrab@physik.uni-erlangen.de Physikalisches Institut, Abt. IV Friedrich-Alexander-Universität Erlangen

  2. CT with the Quad

  3. Ringartefacts in CT Problem: variations in lower threshold lead to differing counting behavior for every pixel (‘gain’) -> ringartefacts in computed tomography

  4. Equalization with Noise

  5. Equalization using Flatfields Histogram of Flatfields: THL-maskbit 0, 7; different THS -> calculate width and distance of distributions

  6. Optimum THS linear fit of right boundary of bit0-distribution vs THS -> OptimumTHS (for every Chip on the Quad!)

  7. Maskquality - Definition Countrate independent parameter for maskquality!

  8. Maskquality

More Related