Acoustic Radiation Force Impulse Imaging with Virtual Touch Tissue Quantification: Measurements of Normal Breast Tissue and Dependence on the Degree of Pre-compression

Sonoelastographic Modalities in the Evaluation of Salivary Gland Characteristics in Sjögren's Syndrome

“…Pre-compression of the investigated tissue is consistently reported to influence the generation of VTQ imaging in all organs (Mantsopoulos et al 2015;Wojcinski et al 2013). This means that application of different amounts of pressure by the sonography probe during the examination can lead to different results in VTQ.…”

“…These new modalities could find their way into the daily clinic routine for various indications in several clinical specialties and, meanwhile, are part of the assessment of the thyroid gland or mammary lesions (Wojcinski et al 2013;Zhang et al 2015). The reliability of sonographic tissue evaluation has proved to be high enough to replace histologic examinations in indications such as grading of liver fibrosis (Corpechot et al 2012;Zhang et al 2014).…”

Stiffness of salivary gland and tumor measured by new ultrasonic techniques: Virtual touch quantification and IQ

“…VTQ in normal tissue has been performed; some reports described the mean VTQ values of breast tissue (3.33 m/s) [8], liver (1.59 and 1.56 m/s), pancreas (1.40 m/s), spleen (2.44 m/s) and kidney (2.24 m/s) [9,10].…”

Applicability of Shear Wave Elastography of the Major Salivary Glands: Values in Healthy Patients and Effects of Gender, Smoking and Pre-Compression

“…The study revealed highly significant differences between different weights (between 22 and 2990 g) for the measured SWEV, thus emphasizing the importance of pressure standardization for the examination procedure. Wojcinski et al (2013) performed a study in a setting comparable to the one described above. This group originally intended to define sono-elastographic reference values for breast parenchyma and breast adipose tissue in healthy women.…”

“…Their statement that ''fat can have the same elasticity as cancer with clinically possible amounts of precompression'' is provocative, but it also reveals a major problem with the valid interpretation of elastography analyses. Both authors point out that determination of the exact applied transducer force will be difficult to implement in a clinical setting and recommend performing SWE with minimal pre-compression (Barr and Zhang 2012;Wojcinski et al 2013). Because the salivary glands are located as superficially as the mammary glands and can therefore be examined with similar insertion depths, a similar effect of pre-compression on SWE measurements might be assumed.…”