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Virtual touch tissue quantification using acoustic radiation force impulse technology: initial clinical experience

Min Bai1, Lianfang Du, Jiying Gu

  • 1Department of Ultrasound, Shanghai First People's Hospital, School of Medicine, Shanghai Jiaotong University, 100 Haining Rd, 200086 Shanghai, China.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|February 3, 2012
PubMed
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Virtual Touch tissue quantification (VTQ) effectively differentiates benign and malignant breast masses using shear wave velocities. This quantitative ultrasound technique offers reproducible results, aiding in accurate diagnosis.

Area of Science:

  • Medical Imaging
  • Diagnostic Ultrasound
  • Biophysics

Background:

  • Solid breast masses require accurate differentiation between benign and malignant types.
  • Sonographic acoustic radiation force impulse (ARFI) technology offers quantitative tissue properties.
  • Virtual Touch tissue quantification (VTQ) is an ARFI-based method for tissue stiffness assessment.

Purpose of the Study:

  • To evaluate the clinical utility of VTQ for distinguishing benign from malignant solid breast masses.
  • To assess the reproducibility of VTQ measurements in breast lesions.

Main Methods:

  • 143 solid breast masses underwent VTQ examination to measure shear wave velocities (SWVs).
  • Reproducibility was assessed by two independent operators on 30 masses.

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  • Histologic results were correlated with SWV measurements.
  • Diagnostic performance was evaluated using receiver operating characteristic (ROC) curve analysis.

    • Main Results:

    • VTQ measurements showed high reproducibility (correlation coefficient = 0.885).
    • A significant difference in SWVs was observed between benign (2.25 ± 0.59 m/s) and malignant (5.96 ± 2.96 m/s) masses (P < .001).
    • VTQ achieved 75.6% sensitivity, 95.1% specificity, and 85.6% area under the ROC curve for differentiation.

    Conclusions:

    • VTQ provides reproducible and quantitative diagnostic information for solid breast masses.
    • VTQ serves as an effective tool for differentiating benign from malignant breast lesions.
    • The technique aids in improving diagnostic accuracy in breast mass evaluation.