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British Journal of Radiology (2004) 77, S201-S208
© 2004 British Institute of Radiology
doi: 10.1259/bjr/66587930
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Full Paper

Fusion of contrast-enhanced breast MR and mammographic imaging data

C P Behrenbruch, PhD1,3,6, K Marias, PhD1,2, P A Armitage, PhD1, M Yam, PhD1, N R Moore, MD, FRCP, FRCR3, R E English4, P J Clarke, MD, FRCS5, F J Leong, MD, PhD, ARPS6 and J M Brady, PhD, FRS, FREng1

1 Medical Vision Laboratory, Engineering Science, Oxford University, Parks Road, Oxford OX1 3PJ, 2 Department of Surgery, Royal Free and University College Medical School, UCL, London NW3 2QG, 3 Magnetic Resonance Imaging Centre, John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, 4 Breast Care Unit and 5 Department of Surgery, Churchill Hospital, Oxford OX3 7LJ and 6 Mirada Solutions Ltd, Level 1, 23–38 Hythe Bridge Street, Oxford OX1 2ET, UK

Increasing use is being made of Gd-DTPA contrast-enhanced MRI (CE-MRI) for breast cancer assessment since it provides three-dimensional (3D) functional information via pharmacokinetic interaction between contrast agent and tumour vascularity, and because it is applicable to women of all ages as well as patients with post-operative scarring. CE-MRI is complementary to conventional X-ray mammography, since it is a relatively low-resolution functional counterpart of a comparatively high-resolution 2D structural representation. However, despite the additional information provided by MRI, mammography is still an extremely important diagnostic imaging modality, particularly for several common conditions such as ductal carcinoma in situ (DCIS) where it has been shown that there is a strong correlation between microcalcification clusters and malignancy. Pathological indicators such as calcifications and fine spiculations are not visible in CE-MRI and therefore there is clinical and diagnostic value in fusing the high-resolution structural information available from mammography with the functional data acquired from MRI. This article is a clinical overview of the results of a technique to transform the coordinates of regions of interest (ROIs) from the 2D mammograms to the spatial reference frame of the contrast-enhanced MRI volume. An evaluation of the fusion framework is demonstrated with a series of clinical cases and a total of 14 patient examples.






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