Breast ultrasound (BUS) imaging is an imaging modality used for the detection and diagnosis of breast lesions
and it has become a crucial modality nowadays specially for providing a complementary view when other modalities
(i.e. mammography) are not conclusive. However, lesion detection in ultrasound images is still a challenging
problem due to the presence of artifacts such as low contrast, speckle, inhomogeneities and shadowing. In order
to deal with these problems and improve diagnosis accuracy, radiologists tend to complement ultrasound imaging
with elastography data. Following the prominent relevance of elastography in clinical environments, it is reasonable
to assume that lesion segmentation methods could also benefit from this complementary information. This
paper proposes a novel breast ultrasound lesion segmentation framework for B-mode images including elastography
information. A distortion field is estimated to restore the ideal image while simultaneously identifying regions
of similar intensity inhomogeneity using a Markov Random Field (MRF) and a maximum a posteriori (MAP)
formulation. Bivariate Gaussian distributions are used to model both B-mode and elastography information.
This paper compares the fused B-mode and elastography framework with B-mode or elastography alone using
different cases, including illustrative cases, where B-mode shows a well defined lesion and where elastography
provides more meaningful information, showing a significant improvement when B-mode images are not conclusive
which is often the case in non cystic lesions. Results show that combining both B-mode and elastography
information in an unique framework makes the algorithm more robust and image quality independent.