Exploring the anatomical factors influencing testes elasticity via ultrasound shear wave elastography: Preliminary results

Purpose

The aim of this study is to evaluate the anatomical factors influencing elasticity values of normal testicular parenchyma using shear wave elastography (SWE).

Methods

This study examined 68 healthy male volunteers (117 testes in which standard transverse axis ultrasonography views could be obtained) via conventional scrotal ultrasonography and SWE. Both the mean (E_Mean) and standard deviation (E_SD) elasticity values were acquired.

Results

In the standard transverse axis view of the rete testis at the mid-lateral edge of the testes, the E_Mean values in 2 mm the testicular parenchyma from the rete testis and the testicular capsule at the same level as the rete testis were all significantly larger than in the central zone (P < 0.001, P < 0.001, respectively). The E_Mean value in the testicular parenchyma 2 mm from the testicular capsule on the line formed approximately 45° below the horizontal line of the rete testis was significantly larger than in the rete testis approximately 45° above the horizontal line (P < 0.001). In two standard transverse axis views, the E_SD values in other regions were significantly larger than those in the central zones (all P < 0.001). Also, the E_Mean values in the transmediastinal arteries were larger than those of the surrounding normal testicular parenchyma (P < 0.001).

Conclusion

Based on SWE, factors including the testicular capsule, the density of testicular fibrous septa, the depth of the Q-Box™, and the transmediastinal artery may influence the testes elasticity measurement.