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Table 4 Mean values of the scores of the structures in all images (VGAS)

From: Development of a zoomorphic test specimen for constancy testing on digital X-ray systems in veterinary radiology

Image 1 2 3 4 5 6 7 8 9 10 11 12 Mean
Trachea and prox. bronchia / 0.17 − 0.17 − 0.33 − 1.50 0.33 − 0.83 − 0.83 − 0.67 0.00 0.17 0.83 − 0.26
Heart silhouette / 0.17 − 0.67 − 0.33 − 0.83 0.17 0.33 − 0.17 − 0.67 0.50 0.33 0.00 − 0.11
Caud. V. cava / 0.33 − 0.50 0.00 − 0.50 0.17 0.17 − 0.33 0.50 0.33 0.00 0.00 0.02
Thoracic aorta / − 0.83 − 0.33 − 0.50 − 0.50 − 0.50 − 0.67 0.00 0.00 − 0.17 − 0.17 − 0.67 − 0.39
Nodule 1 / − 0.17 0.17 − 0.67 − 0.50 0.17 0.17 0.33 − 0.33 0.67 − 0.33 0.00 − 0.05
Nodule 2 / − 0.17 − 0.33 − 0.50 − 0.33 0.83 − 0.50 0.17 0.67 0.00 0.00 − 0.33 − 0.05
Nodule 3 / − 0.67 − 0.33 − 1.50 − 2.00 0.50 − 1.00 − 0.83 − 1.67 − 1.33 − 1.50 − 1.00 − 1.03
Nodule 4 / − 0.17 − 1.50 − 1.50 − 2.17 − 1.17 − 1.67 − 1.17 − 1.50 − 0.83 − 1.33 − 1.33 − 1.30
Nodule 5 / 0.17 − 0.83 − 0.83 − 0.50 0.17 − 0.83 0.00 0.00 − 0.50 0.00 − 0.67 − 0.35
Noise impression / − 0.17 − 0.50 − 0.67 − 1.33 − 0.17 − 0.17 0.00 − 0.67 − 1.17 − 0.17 − 0.17 − 0.47
Mean (VGAS) / − 0.13 − 0.50 − 0.68 − 1.02 0.05 − 0.50 − 0.28 − 0.43 − 0.25 − 0.30 − 0.33  
  1. Italics values showed a significant different VGAS compared to the reference image due to the 5% significance level