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Gammex Boxes in a line scanned together

Gammex Boxes in a line scanned together These ROIs propagated through the entire reconstructed volume. Mean of ROIs. Box causes shift in air CT numbers – about 2 HU. Observations. CT Numbers of foam vary from Gammex box to Gammex box Range 15 HU for 320 kg/m 3 foam

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Gammex Boxes in a line scanned together

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  1. Gammex Boxes in a line scanned together These ROIs propagated through the entire reconstructed volume

  2. Mean of ROIs

  3. Box causes shift in air CT numbers – about 2 HU

  4. Observations • CT Numbers of foam vary from Gammex box to Gammex box • Range 15 HU for 320 kg/m3 foam • Use of Gammex boxes as reference standards will require calibration of each box • Box alters air CT number above the box

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