Eligible participants will include women who:

Were diagnosed with a childhood cancer prior to the age of 21 years;

Were treated with ≥ 10 Gy of chest RT (recent revision with a lower dose threshold);1

Do not have a history of breast cancer;

Have not had both a breast MRI and mammogram in the previous 24 months;

Do not have a contraindication to MRI (i.e., pacemaker);

Are 25 years of age or older at time of enrollment;

Have an interval from their chest RT to the time of enrollment of at least 8 years;

Have a smartphone;

Are English-speaking.

Participants will be selected from women in the Childhood cancer Survivor Study (CCSS) cohort.

Promoting Breast Cancer Screening in Women Who Survived Childhood Cancer