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CD Mammographic Phantom Model 18-227
Model 18-227
Introduction
The CDMAM (Contrast Detail Mammography) Phantom* was developed to evaluate conventional mammographic x-ray equipment, film, and cassettes. However, with the increase of digital imaging in mammography, especially when performing stereotactic breast needle biopsies and preoperative needle localizations, the phantom can aid in achieving improved image quality, processing, display quality, and speed in these new modalities.
What makes the CDMAM Phantom so special?
The CDMAM Phantom consists of an aluminum base with gold discs (99.99% pure gold) of varying thicknesses and diameters, which is attached to a Plexiglas® cover. The 5 mm thick Plexiglas cover (PMMA plate) has a 2 mm deep cavity which accommodates the aluminum base with gold discs. The assembly (PMMA and aluminum) has a Plexiglas® equivalent thickness of 10 mm, under standard mammography-exposure conditions. The aluminum base is 0.05 mm thick Al 1050 (99.5% pure aluminum). The base has been polished and anodized black. Precisely measured gold discs of varying thickness (range = 0.05 to 1.60 μm) and diameter (range = 0.10 to 3.20 μm) have been attached to the base by means of evaporization. Finally, the base has been airbrushed to protect the gold discs.
- Specifically developed to determine if mammographic images are indicating objects with very low contrast and very small diameter
- For full-field analog and digital units
- Comparison of image quality with various screen-film combinations
- Evaluation of conventional, as well as digital and stereotactic modalities
- Determination of the optimum exposure technique, e.g., by variation of tube potential
- Comparison of image quality at various object thicknesses, by variation of the amount of Plexiglas® at a fixed density
* Designed by M.A.O. Thijssen, Ph.D., K.R. Bijkerk, MSc. And J.M. Lindeyer, BSc., Project: Quality Assurance in Mammography (QAMAM), Department of Diagnostic Radiology, University Hospital, St. Radboud, Nijmegen, The Netherlands
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