Fig 1.
Measurements of shear wave elasticities in a target of 8 ± 3 kPa using four different machines.
(A and B) A linear transducer and the VTQ system and a linear transducer and the VTIQ system (ACUSON S2000, Siemens Healthcare, Erlangen, Germany) at depths of 15 mm, (C) a curved transducer and the Aixplorer system (Supersonic Imagine, Aix Provence, France) at a depth of 60 mm, (D) a linear transducer and the Aplio 500 system (Toshiba Medical Systems, Tochigi-ken, Japan) at a depth of 30 mm, and (E) a curved transducer and the EPIQ 5 system (Philips Medical System, Best, the Netherlands) at a depth of 60 mm.
Table 1.
Measurement errors derived from differences between measured values and the margins of the target elasticity values, and proportions of outliers according to target elasticity and acquisition depth.
Table 2.
Measurement errors derived from differences between measured values and the margins of the target elasticity values, and proportions of outliers according to target elasticity and elastography system.
Table 3.
Measurement errors derived from differences between measured values and median target elasticity values according to target elasticity and acquisition depth.
Table 4.
Measurement errors derived from differences between measured values and median target elasticity values according to target elasticity and different elastography systems.
Table 5.
Logistic regression analysis of ultrasound shear wave elasticity measurements according to target elasticity and acquisition depth.