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Comparison of shear wave velocities on ultrasound elastography between different machines, transducers, and acquisition depths: a phantom study

 Hyun Joo Shin  ;  Myung-Joon Kim  ;  Ha Yan Kim  ;  Yun Ho Roh  ;  Mi-Jung Lee 
 EUROPEAN RADIOLOGY, Vol.26(10) : 3361-3367, 2016 
Journal Title
Issue Date
Elastic Modulus* ; Elasticity Imaging Techniques/instrumentation* ; Humans ; Phantoms, Imaging* ; Transducers*
Comparison ; Consistency ; Elastography ; Phantom ; Ultrasound
OBJECTIVES: To investigate consistency in shear wave velocities (SWVs) on ultrasound elastography using different machines, transducers and acquisition depths. METHODS: The SWVs were measured using an elasticity phantom with a Young's modulus of 16.9 kPa, with three recently introduced ultrasound elastography machines (A, B and C from different vendors) and two transducers (low and high frequencies) at four depths (2, 3, 4 and 5 cm). Mean SWVs from 15 measurements and coefficient of variations (CVs) were compared between three machines, two transducers and four acquisition depths. RESULTS: The SWVs using the high frequency transducer were not acquired at 5 cm depth in machine B, and a high frequency transducer was not available in machine C. The mean SWVs in the three machines were different (p?≤?0.002). The CVs were 0-0.09 in three machines. The mean SWVs between the two transducers were different (p?<?0.001) except at 4 and 5 cm depths in machine A. The SWVs were affected by the acquisition depths in all conditions (p?<?0.001). CONCLUSION: There is considerable difference in SWVs on ultrasound elastography depending on different machines, transducers and acquisition depths. Caution is needed when using the cutoff values of SWVs in different conditions. KEY POINTS: ? The shear wave velocities (SWVs) are different between different ultrasound elastography machines ? The SWVs are also different between different transducers and acquisition depths ? Caution is needed when using the cutoff SWVs measured under different conditions.
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1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
Yonsei Authors
Kim, Myung Joon(김명준) ORCID logo https://orcid.org/0000-0002-4608-0275
Kim, Ha Yan(김하얀)
Shin, Hyun Joo(신현주) ORCID logo https://orcid.org/0000-0002-7462-2609
Lee, Mi-Jung(이미정) ORCID logo https://orcid.org/0000-0003-3244-9171
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