Example of Linearity Determination Using Attenuation Tubes
| Determination of… | Tube insert | Reading (mCi*) | Calibration factor | Corrected reading | Percent deviation |
| Calibration factors | Black only (source holder) | 209 | 1.0000 | ||
| Black and red | 120.30 | 1.737 | |||
| Black and orange | 66.50 | 3.142 | |||
| Black and yellow | 19.40 | 10.773 | |||
| Black and green | 5.59 | 37.388 | |||
| Black and blue | 1.89 | 110.582 | |||
| Black and purple | 0.45 | 465.517 | |||
| Dose calibrator linearity† | Black only | 124.5 | 1.0000 | 124.5 | |
| Black and red | 71.40 | 1.737 | 124.0 | −0.24% | |
| Black and orange | 40.10 | 3.142 | 126.0 | 1.01% | |
| Black and yellow | 11.50 | 10.773 | 123.9 | −0.49% | |
| Black and green | 3.31 | 37.388 | 123.8 | −0.60% | |
| Black and blue | 1.11 | 110.582 | 122.7 | −1.40% | |
| Black and purple | 0.26 | 465.517 | 122.7 | −1.45% | |
| Mean | 123.9 | −0.49% |