The purpose of this study is to determine how different types of breast implants contour to the chest wall.

Inclusion Criteria:

• had previous primary breast augmentation
• had previous replacement of breast implants
• has Baker Class I breast implant capsule

Exclusion Criteria:

• has scar capsule contracture around the breast implants of Baker Class II-IV
• is pregnant or may be pregnant
• has possibility or previous history of metallic foreign body

Women 20-50 who previously had primary breast augmentation or replacement of existing breast implants.