Mammo 156 Phantom

The gold standard QA solution for breast health.

  • Measure and monitor mammography systems’ signal to noise, resolution and image quality1
  • Comply with MQSA (FDA), ACR, EUREF, IAEA & ACPSEM requirements
  • Simulate radiographic characteristics of compressed breast tissue
  • Help improve patient outcomes

When the U.S. mandated mammography QA requirements via the the Mammography Quality Standards Act (MQSA), medical physicists, the ACR and the FDA worked with Gammex to design what is known today as the Mammo 156 Phantom.

The Mammo 156 phantom helped establish the mammography repeatability and reproducibility standard. With this resource, any technologist (radiographer) on any machine can provide the same image set to help detect breast cancer.

The phantom mimics breast tissue. It is a feedback mechanism that provides a framework for constant improvement in early detection and mortality reduction. Imbedded objects mimic breast diseases, micro calcifications, fibrous structures and tumor masses.

S3 156 Mam Phantom


Evaluate Image Quality
The Mammo 156 Phantom, by design, contains test objects that are both visible on any system and difficult to see on the best mammographic

The Mammo 156 Phantom for Accreditation

  • Provides quick detection of objects from 0.16 to 2.0 mm
  • First MQSA-approved mammography phantom

Maintain Accreditation
Clinical and technical publications reference the Mammo 156 Phantom more than any other mammography phantom.


Wax and acrylic equivalent to 4.2 cm thick compressed breast tissue. 50% adipose & 50% glandular

Mammography Phantom: 156
Nylon Fibers (Fibrils): 6
Micro-calcifications: 5 Groups
Masses: 5
Dimensions: (L/W/H) 10.2 x 10.8 x 4.5 cm
S4  Small Image

1ACR Mammography Accreditation Program Testing Instructions (


A Full Line of Mammography QA Tools
Choose from kits that include everything you need to start a program, to kits for routine QC. Or select from disposable breast biopsy training tools, a breast compression device that measures compression force or phototimer consistency tools that test Automatic Exposure Control (AEC).