The Gammex 156D Stereotactic Mammographic Accreditation Phantom is used for monitoring digital mammography systems currently used for stereotactic biopsy and localization. 

The 156D is accredited by the ACR.

• Compact size
• Wax insert contains 12 sets of test objects
• Approximates the size of a 4.2 cm compressed breast of 50% glandular and 50% adipose compostion
• Wax insert contains
  • Simulated micro-calcifications of Aluminum oxide specks
  • 4 different size nylon fibers to simulate fibrous structures
  • 4 different size lens-shaped masses to simulate tumors
• Replaceable wax insert which contains the targets