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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Acad Radiol. 2009 May;16(5):627–637. doi: 10.1016/j.acra.2008.12.002

Table 1.

This table lists the pixel intensities of the three nodules shown in Figure 4A. Mean, SD, Maximum, and Z-scores are given. The Z-scores show that the maximum pixel intensity in the location of the visualized nodules is always at least 2.9 SD above the mean, indicating that the presumed 1–4 pixel nodules are not likely to be due to image noise.

MEAN SD Maximum Z-Score Expected pixel frequency at and above this Z -score
Nodule 1 Pre-contrast 599 332 1567 2.92 4 per 1000
Post scL-gad-d 667 391 1946 3.27 5 per 10,000
Nodule 2 Pre-contrast 591 299 1589 3.34 4 per 10,000
Post scL-gad-d 665 339 2274 4.75 1 per 100,000
Nodule 3 Pre-contrast 566 278 1588 3.68 1 per 10,000
Post scL-gad-d 981 515 2542 3.03 1 per 1000