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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2015; 25(04): 397-403
DOI: 10.4103/0971-3026.169455
Breast Radiology

Qualitative and quantitative diffusion-weighted imaging of the breast at 3T - A useful adjunct to contrast-enhanced MRI in characterization of breast lesions

Richa Bansal
Department of Radiodiagnosis, Max Super Speciality Hospital, New Delhi, India
,
Viral Shah
Department of Radiodiagnosis, Max Super Speciality Hospital, New Delhi, India
,
Bharat Aggarwal
Department of Radiodiagnosis, Max Super Speciality Hospital, New Delhi, India
› Author Affiliations Financial support and sponsorship Nil.
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Abstract

Objective: To distinguish between benign and malignant breast lesions on the basis of their signal intensity on diffusion-weighted imaging and their apparent diffusion coefficient (ADC) values at 3 T MRI, along with histopathological correlation. Materials and Methods: A retrospective analysis of 500 patients who underwent 3 T MRI between August 2011 and May 2013 was done. Of these, 226 patients with 232 lesions that were proved by histopathology were included in the study. ADC values were calculated at b values of 0, 1000, and 1500 s/mm2 after identification on contrast-enhanced images and appropriate ROI(Region of interest) placement. ADC value and histopathology correlation was analyzed. Results: Out of 232 lesions, 168 lesions were histologically malignant and 64 were histologically benign. With an ADC cut-off value of 1.1 ×10−3 mm2/s for malignant lesions, a sensitivity of 92.80% and specificity of 80.23% was obtained. Out of 12/232 false-negative lesions, 6 were mucinous carcinoma in which a high ADC value of 1.8-1.9 ×10−3 mm2/s was obtained. Purely DCIS (Ductal carcinoma in situ) lesions presenting as non-mass-like enhancement had a high ADC value of 1.2-1.5 ×10−3 mm2/s, thereby reducing specificity. Conclusion: Diffusion-weighted Imaging and quantitative assessment by ADC values may act as an effective parameter in increasing the diagnostic accuracy and specificity of contrast-enhanced breast MRI in characterization of breast lesions.

Keywords

Apparent diffusion coefficient - breast cancer - breast imaging - diffusion‑weighted imaging


Publication History

Article published online:
30 July 2021

© 2015. 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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