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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
Australia 2 2 Yes (100%) Yes (100%) Third reader NR NR NR
Canada 2 2 No (10%)1 No (10%) Third reader No2 No No
China 1 1 No No No No No
Denmark 2 2 Yes (100%) Yes (100%) Third reader/ discussion between readers No No No
Finland 2 2 Yes Yes Discussion between readers No No No
France 2 2 Yes (92%) Yes (96%) Third reader/ discussion between readers No No No
Iceland 2 2 Yes (85%) Yes (85%) Woman always recalled No No No
Israel 2 2 No No No NR NR
Italy 2 2 Yes Yes Third reader/ discussion between readers NR NR NR
Japan 2 2 Yes (100%) Yes (100%) Discussion between readers No No No
Korea 2 2 No No No No No
Luxembourg 2 2 Yes (100%) Yes (100%) Discussion between readers Yes Yes Yes
Netherlands 2 1 Yes (100%) Yes (100%) Third reader/ discussion between readers No NR No
New Zealand 2 2 Yes (100%) Yes (100%) Discussion between readers No No No
Norway 2 2 Yes (100%) Yes (100%) Consensus panel or committee No No No
Poland 2 2 Yes (100%) Yes (100%) Third reader/ discussion between readers Yes Yes Yes
Portugal (Central Region) 2 2 Yes (100%) Yes (100%) Third reader No No No
Portugal (Alentejo Region) 2 2 Yes (100%) Yes (100%) Third reader/ consensus panel or committee No No No
Saudi Arabia Yes (100%) No (10%) Third reader No No No
Spain (Catalonia) 2 2 Yes (100%) Yes (100%) Third reader/ discussion between readers No No No
Spain (Navarra) 2 2 No No Yes No NR
Sweden 2 2 Yes Yes NR NR NR
Switzerland 2 2 Yes (100%) Yes (100%) Third reader No NR No
United Kingdom 2 2 No (99%) No (99%) Other: any of the first 3 readers No No No
United States3 2 2 No (20%) No (20%) Other: varies by program Yes Yes Yes
Uruguay 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.