Fluke Biomedical 18-222 - Manual (Page 10)

2-2
Cleaning may be accomplished by using mild soap and water solution. It has been reported that some detergents
cause the surface of the to become tacky. We use "Armor-All" vinyl protectant and experience no difficulty with tacky
surfaces.
Avoid contact with corrosive substances and with radiographic contrast media. Wash thoroughly if such contact
occurs.
Desirable Features of A Breast Phantom
1. Structural characteristics of the phantom:
a. Phantom should be realistically shaped.
b. Phantom should be tissue equivalent.
c. Phantom should have a realistic background
d. Phantom components should mimic features of breast disease (calcifications, tumors.).
2. Phantom should be easy to use.
3. Phantom should test relevant parameters including absorbed dose and image quality.
4. Phantom images should be easy to interpret and provide an accurate, unambiguous measure of image
quality.
Figure 2-1. Suggested Dose Chart
(1) ½ RAD is considered the maximum acceptable dose for 1 view mammogram of the average patient per the National
Council on Radiation Protection and Measurements (NCRP-80).
(2) NCRP-85; Pages 40 – 56.
(3) Measurements were taken at exposure settings that produced background photographic density of 1.0 using Ortho-M
Film, Min-R screen, Grid, and General Purpose film processor.
Suggested Dose Curve for
Tissue-Equivalent Phantom with
CGR-500 Unit
(HVL = .344 @ 30 kVp)
kVp
Dg
(RADS)
Average
Gland
u
lar Dose
(2)