Abstract
Purpose
To prospectively evaluate the usefulness of contrast-enhanced ultrasound (CEUS) using parametric imaging for breast cancer in a multicenter study.
Methods
A total of 65 patients with breast cancer were included in this study. CEUS was performed, and still images on peak time (S), accumulated images (A) and parametric images (P) were generated from the raw data. Four blind reviewers ranked the best visible images as first place, and determined second and third place consecutively. We compared the average ranking of each image. The maximal diameter of the tumor determined on ultrasonography and MRI was compared with the corresponding pathological maximal diameter for 48 of the 65 patients. The correlation between the diameter determined by two experts and two beginners was analyzed.
Results
The average rank of visibility was as follows: P, 1.44; A, 2.04; and S, 2.52. The correlation between each image and the pathology was as follows: P, r = 0.664; A, r = 0.630; S, r = 0.717; and MRI, r = 0.936. There were no significant differences among the correlation between the experts and beginners in each image.
Conclusions
The use of parametric imaging improves the visibility of CEUS. The maximal diameter of the tumor determined on CEUS correlates substantially with the pathology.
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All authors declare that they have no conflict of interest.
Ethical standards
This study was performed at Mie University Hospital and Nara Medical University Hospital. The study was approved by the Ethical Review Board of both hospitals (UMIN000013345). Written informed consent was obtained from all patients.
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Noro, A., Nakamura, T., Hirai, T. et al. Impact of parametric imaging on contrast-enhanced ultrasound of breast cancer. J Med Ultrasonics 43, 227–235 (2016). https://doi.org/10.1007/s10396-015-0692-7
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DOI: https://doi.org/10.1007/s10396-015-0692-7