Check could save life.
Mobile breast screening units tour the region, parking up in hospital and supermarket car parks offering tests to women.
When the unit is in your area, you'll receive an invitation for screening.
Blyth Community Hospital in Northumberland will be hosting the mobile unit for the next six months and women in the area will be invited to attend for tests.
The Lady Mayor of Blyth, Coun Kath Nisbet, will formally launch the arrival of the unit, accompanied by her sister Lilian Lisle whose breast cancer was successfully treated after being spotted at a routine screening appointment.
Coun Nisbet said: "I fully support the breast cancer screening scheme and feel it is very important that people take the opportunity of being checked."
Dr Helen Watson, consultant in public health medicine for Northumberland Care Trust, said: "The test takes no longer than five minutes and the results are posted out within three weeks.
"It will be three years before the mobile unit returns to the town so this is a good opportunity to attend for screening locally.
"Last year, more cancers than ever before were detected by the NHS Breast Screening Programme. The good news is that early detection combined with improvements in prompt treatment means that more women are surviving breast cancer."
Women aged 71 and over will not be sent an invitation but can be screened on request by contacting Breast Screening Administration, Victoria Wing, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, telephone (0191) 282 0202.