A wearable ultrasound patch which attaches to a bra could help detect breast cancer more quickly in women at high risk.
Taking less than five minutes to use, it should detect tumours which are missed in between mammograms.
For most women, the risk of detecting slow-growing tumours which would not cause a problem, and subjecting them to unnecessary treatment, means that extra scans between mammograms are not necessary.
But women at high risk of developing aggressive breast cancer could potentially