Policies on Number of Views, Double-Reading, and Computer Aided Detection for Breast Cancer Screening Programs in 26 ICSN Countries, 2012*
| Region/Country |
Number of Views |
Double Reading Required? |
If Discordant, resolve by |
Is computer aided detection (CAD) used for: |
| Initial Screen |
Subsequent Screen |
Initial Screen (% double read) |
Subsequent Screen (% double read) |
Screening mammo |
Diagnostic mammo |
Double reading |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader |
NR |
NR |
NR |
| 2 |
2 |
No (10%)1 |
No (10%) |
Third reader |
No2 |
No |
No |
| 1 |
1 |
No |
No |
|
No |
No |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader/ discussion between readers |
No |
No |
No |
| 2 |
2 |
Yes |
Yes |
Discussion between readers |
No |
No |
No |
| 2 |
2 |
Yes (92%) |
Yes (96%) |
Third reader/ discussion between readers |
No |
No |
No |
| 2 |
2 |
Yes (85%) |
Yes (85%) |
Woman always recalled |
No |
No |
No |
| 2 |
2 |
No |
No |
|
No |
NR |
NR |
| 2 |
2 |
Yes |
Yes |
Third reader/ discussion between readers |
NR |
NR |
NR |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Discussion between readers |
No |
No |
No |
| 2 |
2 |
No |
No |
|
No |
No |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Discussion between readers |
Yes |
Yes |
Yes |
| 2 |
1 |
Yes (100%) |
Yes (100%) |
Third reader/ discussion between readers |
No |
NR |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Discussion between readers |
No |
No |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Consensus panel or committee |
No |
No |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader/ discussion between readers |
Yes |
Yes |
Yes |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader |
No |
No |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader/ consensus panel or committee |
No |
No |
No |
|
|
Yes (100%) |
No (10%) |
Third reader |
No |
No |
No |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader/ discussion between readers |
No |
No |
No |
| 2 |
2 |
No |
No |
|
Yes |
No |
NR |
| 2 |
2 |
Yes |
Yes |
|
NR |
NR |
NR |
| 2 |
2 |
Yes (100%) |
Yes (100%) |
Third reader |
No |
NR |
No |
| 2 |
2 |
No (99%) |
No (99%) |
Other: any of the first 3 readers |
No |
No |
No |
| 2 |
2 |
No (20%) |
No (20%) |
Other: varies by program |
Yes |
Yes |
Yes |
| 2 |
2 |
No |
No |
Consensus panel or committee |
No |
No |
No |
*Data are from a survey of ICSN country representatives, conducted in 2012
NR= Not reported, the respondent left question blank
1 Double reading only occurs in a few provinces. 10% of all screens are computer selected for double reads in Nova Scotia only.
2 CAD reading is done is some provinces such as Ontario for screening and diagnostic mammography.
3 Data comes from the Breast Cancer Surveillance Consortium.
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