Advances in knowledge:1. Advanced computational methods using multiparametric deep learning (MPDL) with multiparametric MRI are significant predictors of malignant or benign breast lesions.2. Development of a "tissue based" deep learning method validated with an independent radiological data set.3. The MPDL model with pharmacokinetic modeling parameters and diffusion weighted imaging/Apparent Diffusion Coefficient metrics demonstrated similar diagnostic performance of the radiologist in characterizing breast lesions.Implications for patient care: The integration of advanced computational techniques and artificial intelligence methods to assist radiologists will become available in the future reading rooms and will transform medicine in general. Deep learning methods will be the conduit for modeling of clinical and radiological variables which will provide the foundation for radiological precision medicine in patients.
AbstractBackground and Purpose: Integration of advanced computational techniques and artificial intelligence methods to assist radiologists will become available in future reading rooms and will transform medicine in general. This study was conducted to evaluate the feasibility and role of a novel deep learning method using multiparametric breast Magnetic Resonance Imaging(mpMRI) and defining tissue signatures for improved automated detection and characterization of breast lesions.
Methods: We developed and tested a multiparametric deep learning(MPDL) network for segmentation and classification of breast MRI in 171 patients. The MPDL network was constructed from stacked sparse autoencoders. MPDL network inputs were T1 and T2-weighted imaging, diffusion weighted imaging(DWI) and ADC mapping, and dynamic contrast enhanced(DCE) imaging tissue signatures. Evaluation of MPDL consisted of cross-validation, sensitivity and specificity. Dice similarity between MPDL and post-DCE lesions were evaluated. Statistical significance was set at p≤0.05. Results: The performance of MPDL on Modified National Institute of Standards and Technology database(MISNT) data set was 99.7%. For MRI validation set, a 4.2%±3.6% percent difference between volumes was found between MPDL and test data set. The MPDL segmented glandular, fatty, and lesion tissue with an overlap of 0.87±0.05 for malignant patients and 0.85±0.07 for benign patients. The sensitivity and specificity for differentiation of malignant from benign lesions were 90% and 85% respectively with an AUC of 0.93 Conclusion: Integrated MPDL method accurately segmented and classified different breast tissue from multiparametric breast MRI. Deep learning can be used to construct a personalized database of tissue signatures with accurate characterization of different tissue types.