Optimal specimen placement in cone beam X-ray computed tomography

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• 作者：C. Heinzl^a ; ^{c.heinzl@fh-wels.at} ; J. Kastner^a ; A. Amirkhamov^b ; E. Grö ; ller^b ; C. Gusenbauer^a
• 关键词：Computed tomography ; Dreamcaster ; Optimal specimen placement
• 刊名：NDT and E International
• 出版年：2012
• 期刊代码：38_09638695
• 类别：ph
• 出版时间：September, 2012
• 卷：50
• 期：Complete
• 页码：42-49
• 文件大小：1259 K

摘要

Picking a specimen's optimal placement on the rotary plate of a cone beam X-ray computed tomography system is a time-consuming but critical task in its application. Due to suboptimal placements artifacts, irregularities and distortions may result, which hinder or prevent reliable evaluations. To determine the optimal specimen placement a method is introduced, which allows analyzing and assessing potential specimen placements. Based on the specimen's 3D geometrical model the analysis considers X-ray penetration lengths, the specimen's Radon space representation as well as the placement's stability. The results are visually represented and analyzed in placement maps, revealing areas prone to artifacts.