Evaluation of breast cancer using intravoxel incoherent motion (IVIM) histogram analysis: comparison with malignant status, histological subtype, and molecular prognostic factors

Gene Young Cho, Linda Moy, Sungheon G. Kim, Steven H. Baete, Melanie Moccaldi, James S. Babb, Daniel K. Sodickson, Eric E. Sigmund

    Research output: Contribution to journalArticle

    Abstract

    Purpose: To examine heterogeneous breast cancer through intravoxel incoherent motion (IVIM) histogram analysis. Materials and methods: This HIPAA-compliant, IRB-approved retrospective study included 62 patients (age 48.44 ± 11.14 years, 50 malignant lesions and 12 benign) who underwent contrast-enhanced 3 T breast MRI and diffusion-weighted imaging. Apparent diffusion coefficient (ADC) and IVIM biomarkers of tissue diffusivity (Dt), perfusion fraction (fp), and pseudo-diffusivity (Dp) were calculated using voxel-based analysis for the whole lesion volume. Histogram analysis was performed to quantify tumour heterogeneity. Comparisons were made using Mann–Whitney tests between benign/malignant status, histological subtype, and molecular prognostic factor status while Spearman’s rank correlation was used to characterize the association between imaging biomarkers and prognostic factor expression. Results: The average values of the ADC and IVIM biomarkers, Dt and fp, showed significant differences between benign and malignant lesions. Additional significant differences were found in the histogram parameters among tumour subtypes and molecular prognostic factor status. IVIM histogram metrics, particularly fp and Dp, showed significant correlation with hormonal factor expression. Conclusion: Advanced diffusion imaging biomarkers show relationships with molecular prognostic factors and breast cancer malignancy. This analysis reveals novel diagnostic metrics that may explain some of the observed variability in treatment response among breast cancer patients. Key Points: • Novel IVIM biomarkers characterize heterogeneous breast cancer. • Histogram analysis enables quantification of tumour heterogeneity. • IVIM biomarkers show relationships with breast cancer malignancy and molecular prognostic factors.

    Original languageEnglish (US)
    Pages (from-to)2547-2558
    Number of pages12
    JournalEuropean Radiology
    Volume26
    Issue number8
    DOIs
    StatePublished - Aug 1 2016

    Keywords

    • Breast MR
    • Breast cancer
    • Diffusion-weighted MRI
    • Intravoxel incoherent motion
    • Tumour heterogeneity

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging

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