An artificial intelligence system developed by the NHS and Google could dramatically speed up diagnosis times for women with breast cancer, a study suggests. The "deep learning" system outperformed human experts in detecting breast cancer from x-rays. Integrating the system into Britain's breast cancer screening process -- in which a mammogram is read by two NHS radiologists -- could reduce the second reader's workload by nearly 90 per cent, according to the study. Women between the ages of 50 and 71 are invited to receive a mammogram on the NHS every three years. An x-ray of the breast tissue is used to look for abnormal growths or changes that may be cancerous.