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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2013; 23(01): 19-25
DOI: 10.4103/0971-3026.113614
ORIGINAL ARTICLE

Role of quantitative pharmacokinetic parameter (transfer constant: Ktrans) in the characterization of breast lesions on MRI

Jena Amarnath
Department of MRI, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi
,
Taneja Sangeeta
Department of MRI, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi
,
Shashi Bhushan Mehta
Department of MRI, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi
› Author Affiliations Source of Support: Nill.
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Abstract

Background: The semi-quantitative analysis of the time-intensity curves in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) has a limited specificity due to overlapping enhancement patterns after gadolinium administration. With the advances in technology and faster sequences, imaging of the entire breast can be done in a few seconds, which allows measuring the transit of contrast (transfer constant: Ktrans) through the vascular bed at capillary level that reflects quantitative measure of porosity/permeability of tumor vessels. Aim: Our study aims to evaluate the pharmacokinetic parameter Ktrans for enhancing breast lesions and correlate it with histopathology, and assess accuracy, sensitivity, and specificity of this parameter in discriminating benign and malignant breast lesions. Materials and Methods: One hundred and fifty-one women with 216 histologically proved enhancing breast lesions underwent high temporal resolution DCE-MRI for the early dynamic analysis for calculation of pharmacokinetic parameters (Ktrans) using standard two compartment model. The calculated values of Ktrans were correlated with histopathology to calculate the sensitivity, specificity, and accuracy. Results: Receiver operating characteristic (ROC) curve analysis revealed a mean Ktrans value of 0.56, which reliably distinguished benign and malignant breast lesions with a sensitivity of 91.1% and specificity of 90.3% with an overall accuracy of 89.3%. The area under curve (AUC) was 0.907. Conclusion: Ktrans is a reliable quantitative parameter for characterizing benign and malignant lesions in routine DCE-MRI of breasts.

Keywords

Breast lesions - dynamic contrast-enhanced magnetic resonance imaging - Ktrans


Publication History

Article published online:
04 October 2021

© 2013. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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