Keywords:
Image verification, Comparative studies, Ultrasound, Neuroradiology peripheral nerve
Authors:
S. Vitali, P. Rossi, G. Aringhieri, T. Bocci, D. Barloscio, M. Santin, F. Sartucci, D. Caramella; Pisa/IT
DOI:
10.1594/ecr2018/C-1508
Results
As regards the CSA values obtained at the carpal tunnel inlet,
we measured a median of 9.50 mm2 using the 19 MHz probe and a median of 10.12 mm2 using the 70 MHz probe (fig.
6 and 8).
The p-value,
calculated with the Wilcoxon test,
was 0.28 so that we can accept the hypothesis of significant equality of the medians of the two groups.
The median obtained using VHRUS is slightly higher than the median obtained using HRUS,
which indicates a slight underestimation by the latter.
As regards the CSA values obtained at the distal forearm,
we measured a median of 7.41 mm2 using the 19 MHz probe and a median of 7.61 mm2 using the 48 MHz probe (fig.
7 and 8).
The p-value,
calculated with the Wilcoxon test,
was 0.23 so that we can accept again the hypothesis of significant equality of the medians of the two groups.
However,
in this case,
the difference found between the two median areas is lower than the previous comparison.
Also,
the comparison of the perimeters did not show a significant difference in both scans: at the carpal tunnel inlet,
we measured a median of 13.43 mm using the 19 MHz probe and a median of 15.27 mm using the 70 MHz probe (Wilcoxon test p-value 0.13); at the distal forearm,
we measured a median of 10.38 mm using the 19 MHz probe and a median of 10.75 mm using the 48 MHz probe (Wilcoxon test p-value 0.11) (fig.
9).
Having obtained similar measures of the areas and perimeters,
we hypothesized that also the morphologies of the axial sections of the MN's examined were not significantly different.