94 MR Mammography: Silicone
Figure 94.1 presents multiple axial images from a silicone breast implant MR exam, together with a single sagittal image through the left breast. The imaging sequence employed both water and fat suppression, with silicone depicted as high signal intensity. Both implants demonstrate infolding of the silicone envelope, with silicone outside the envelope but contained within the fibrous capsule (a bilateral encapsulated leak, also known as an intracapsular rupture). The most reliable indicator of implant rupture on MR is the wavy line or linguine sign. Well seen in the left breast, this sign is characterized by multiple thin curvilinear lines within the implant, corresponding with the collapsed implant shell surrounded by silicone.
