Mammography Phototimer Consistency Testing Slabs - CIRS 014A
Better than PMMA for AEC Calibration

The American Cancer Society and American College of Radiology guidelines for the screening of asymptomatic women have made over 50 million women candidates for mammography. In light of the staggering numbers involved, it's critically important that simple but reliable methods be developed to assess system performance and assure consistent production of diagnostically useful images.

CIRS Phototimer Consistency Testing Slabs are designed for precise assessment of AEC system performance in accordance with American College of Radiology and MQSA recommendations. Unlike acrylic, these testing slabs are manufactured with very tight thickness tolerances and more accurately simulate real breast tissue over the range of energies used in mammography. BR-12 (47% glandular / 53% adipose) is most commonly used.

Features
Specifications
Mammography Phototimer Consistency Testing Slabs
Model Standard Glandularity Qty Length (cm) Width (cm) Thickness (cm)
014A BR12 3 12.5 10 2
BR12 2 12.5 10 1
BR12 1 12.5 10 0.5
Optional Glandularities: Any combination ranging from pure glandular to pure adipose are available on request.

Optional Thicknesses Available: 0.1, 0.2, 0.5, 1, 2, 3, 4, 5, 6 and 7 cm can be manufactured upon customer's request.

*To have 2 cm slab with embedded detail plate placed in background compositions other than 50/50, contact Supertech for a quote


Compensation Plate Diagram

Phototimer Compensation Plate
Contrast Stepwedge
(5mm Thickness)
1.
2.
Adipose tissue
Glandular tissue
Hemispheric Masses
75% Glandular Tissue
Thickness (mm)
3.
4.
5.
6.
7.
8.
3.16
2.38
1.98
1.59
1.19
0.90
Calcium Carbonate (mm)
9.
10.
11.
12.
13.
14.
0.39
0.27
0.23
0.20
0.16
0.13
Alumina (mm)
15.
16.
17.
18.
19.
20.
0.39
0.27
0.23
0.20
0.16
0.13
Fibril
21.
22.
Diameter = 25 Microns High Contrast
Line pair test target


References:

White, D.R., R.J. Martin, and R. Darlison, Epoxy resin based tissue substitutes, British Journal of Radiology, 5, 814-821, 1977.

Materials are formulated to maximize simulation properties at 20 keV for the mammographic range, 80 keV for the diagnostic range and 0.5 MeV and above for the therapeutic range.




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