Breast imaging: is the sonographic descriptor of orientation valid for magnetic resonance imaging?

Purpose: To evaluate if the Breast Imaging Reporting and Data System (BI‐RADS) ultrasound descriptor of orientation can be used in magnetic resonance imaging (MRI). Materials and Methods: We conducted a retrospective study to evaluate breast mass lesions identified by MRI from 2008 to 2010 who had u...

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Bibliographic Details
Published in:Journal of magnetic resonance imaging 2012-12, Vol.36 (6), p.1383-1388
Main Authors: Oliveira, Tatiane M.G., Brasileiro Sant'Anna, Tatiana Kelly, Mauad, Fernando M., Elias Jr, Jorge, Muglia, Valdair F.
Format: Article
Language:English
Subjects:
Algorithms
BIRADS
breast cancer
Breast Neoplasms - diagnosis
Female
Humans
Image Enhancement - methods
Image Interpretation, Computer-Assisted - methods
Magnetic resonance imaging
Magnetic Resonance Imaging - methods
Middle Aged
MRI
Patient Positioning - methods
Reproducibility of Results
Sensitivity and Specificity
Ultrasonography, Mammary - methods
ultrasound
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Summary:Purpose: To evaluate if the Breast Imaging Reporting and Data System (BI‐RADS) ultrasound descriptor of orientation can be used in magnetic resonance imaging (MRI). Materials and Methods: We conducted a retrospective study to evaluate breast mass lesions identified by MRI from 2008 to 2010 who had ultrasound (US) and histopathologic confirmation. Lesions were measured in the craniocaudal (CC), anteroposterior (AP), and transverse (T) axes and classified as having a nonparallel orientation, longest axis perpendicular to Cooper's ligaments, or in a parallel orientation when the longest axis is parallel to Cooper's ligaments. The MR image data were correlated with the US orientation according to BI‐RADS and histopathological diagnosis. Results: We evaluated 71 lesions in 64 patients. On MRI, 27 lesions (38.0%) were nonparallel (8 benign and 19 malignant), and 44 lesions (62.0%) were parallel (33 benign and 11 malignant). There was significant agreement between the lesion orientation on US and MRI (kappa value = 0.901). The positive predictive values (PPV) for parallel orientation malignancy on MR and US imaging were 70.4% and 73.1%, respectively. Conclusion: A descriptor of orientation for breast lesions can be used on MRI with PPV for malignant lesions similar to US. J. Magn. Reson. Imaging 2012; 36:1383–1388. © 2012 Wiley Periodicals, Inc.
ISSN:1053-1807
1522-2586
DOI:10.1002/jmri.23776