The automatic method showed a slight underestimation (5%%) in RM activity concentrations compared with the manual method.
The same conclusion is drawn for the case of the water-filled torso despite a slight underestimation of the number of counts in the photopeak.
The ratios of measured to predicted concentrations for the near bottom sample were 1.25 for naphthalene, indicating a slight underestimation of the model.
Therefore, the 2D attenuation map from the CT does not perfectly match the WBS image leading to a slight underestimation of the activity in the arms.
At hexagon level a slight underestimation of AGB is visible, as the most of the dots in the scatterplots were located below the 1 1 line.
The comparison between observed and GCMs-derived temperature in Fig. 13a, b showed a slight underestimation of GCMs-derived temperature while Fig. 13c indicated an overestimation.
In the Hankinson formula, the difference between the predicted strength with n = 2 and the measured data was very small, with a slight underestimation at grain angles of 15°, 30° and 45°.
The method is evaluated using a two and a five storey frame and the results are in good agreement with Monte-Carlo results although a slight underestimation occurs for larger loads.
The results shown in Fig. 4 revealed that the quantification is indeed position dependent, with excellent performance near the center of the FOV, and a slight underestimation near the edge of the FOV.
Apart from the above mentioned case of Izaña, where a strong negative bias of the NN versus the ozonesonde data exists, a slight underestimation tendency can be observed over all the six stations considered in this article.
A slight underestimation of sleep problems, as compared to the general migraine population, is expected in our study because patients with any known and diagnosed previous sleep disorders were excluded, however, this exclusion is a strength regarding the major aims of the study.
