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Number of publications by time period and Tier (1, 2, or 3) used in estimating glandular tissue doses received by populations undergoing mammographic examinations.
| Period | Tier 1 publications (Distribution of Dg to individuals) |
Tier 2 publications (Dg for an average breast size) |
Tier 3 publications (Incident air kerma) |
|---|---|---|---|
| 1960–1964 | - | - | 5 |
| 1965–1969 | - | - | 5 |
| 1970–1974 | - | - | 3 |
| 1975–1979 | - | - | 9 |
| 1980–1984 | - | 1 | 1 |
| 1985–1989 | - | 4 | 1 |
| 1990–1994 | 5 | 4 | 3 |
| 1995–1999 | 9 | 3 | 1 |
| 2000–2004 | 5 | 1 | - |
| 2005+ | 1 | - | 1 |
