Breast resonance
Bilateral and simultaneous breast MRI was performed using a 1.5 T magnet (Signa HDXT, General Electric Medical Systems, Milwaukee, Wisconsin). Images were obtained before and after a 0.1 mmol/kg bolus injection of intravenous gadolinium contrast with an infusion pump in the axial plane. The acquisition protocol included a pre-contrast fat-suppressed T2 weighted Fast Spin Echo with a slice thickness of 3 mm, a fat-suppressed T1 3D gradient-echo pre (one sequence) and post (3 sequences) contrast with a slice thickness of 1.2—1.5 mm and acquisition time < 90 s and subtracted images. Our protocol also included diffusion-weighted imaging with a b value at 0 and 800 s/mm2.The MRI, ultrasound, and mammogram interpretation were performed by two radiologists with more than five years of experience in breast imaging.