DMAM2 & DMAM2+ - Leeds Test Objects



DMAM2 & DMAM2+ - Leeds Test Objects

DMAM2 is a set mammography phantoms for digital mammography systems, designed to be used quickly and easily on a regular basis to provide an ongoing check of imaging performance, particularly those aspects which are most liable to deterioration. An ongoing record of the results of these checks will reveal any trend towards deterioration in imaging performance.
DMAM2 contains the following:
  • DMAM2 Plus contains our tomosynthesis Z-resolution plate in addition to the following:
Threshold Contrast Details
78 contrast details in 6 sizes, dia range from 0.1mm to 2.0mm, contrast range 0.489% to 27.56%
6 groups of multi-directional filaments 0.40mm to 0.20mm diameter
PMMA plates
Polymethylmethacrylate (PMMA) plates with a dimensional tolerance of ±0.1mm.
(1pc) 300 x 240 x 20mm (inc encapsulated 99.99% Al foil for SNR, CNR)
(2pc) 300 x 240 x 20mm
(1pc) 300 x 240 x 10mm
(1pc) 300 x 240 x 5mm
Radiopaque mesh
400 micron (mesh size #40) covering an area 300 x 240mm
Radiopaque grid
Horizontal, vertical and diagonal lines covering an area 300 x 240mm
Stainless steel straight edge
accurate to ±20 microns. Angled at 3°
Spatial Resolution Test Pattern
0.5 – 14.3 LP/mm. Angled at 45°
X-ray to Light Field Alignment
Radiopaque Rulers x4, Phosphor Screens x5
Aluminium filter
2.0 ±10% mm 99.9%+ purity for homogeneity tests
Foam spacers
to set the compression paddle position.
1.0mm stainless steel plate
300 x 240mm, to shield the detector from X rays during measurement of incident air kerma at the entrance surface of PMMA slabs.
Conforms to standards:
European guidelines for quality assurance in breast cancer screening and diagnosis (4th edition) – ISBN 92-79-01258-4

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