首页 > VOA慢速英语 > 健康报道 > 【健康报道】Google AI系统可以改善乳腺癌的检测 Google AI System Could Improve Breast Cancer Detection


【健康报道】Google AI系统可以改善乳腺癌的检测 Google AI System Could Improve Breast Cancer Detection

来源:慢速英语   时间:2020-01-10 16:39:49

A Google artificial intelligence system was as good as expert radiologists at discovering which women had breast cancer in a new study. The system made the findings from thousands of mammogram images, researchers in the United States and Britain reported.


This is the newest study to show that artificial intelligence, or AI, may improve the accuracy of mammograms. Breast cancer affects one in eight women around the world. The study was published in the journal Nature.


The American Cancer Society says radiologists miss about 20 percent of breast cancers in mammograms. And many women who get the tests have a false positive result at some point. A false positive result shows a woman with cancer even though she does not have it.


The findings of the study were developed with DeepMind AI, which joined with Google Health in September.

该研究的结果由DeepMind AI开发,并于9月与Google Health一起加入。

The study results represent a big step toward the possibility of early breast cancer detection, said Mozziyar Etemadi. He is one of the study writers and based at Northwestern Medicine in Chicago.

Mozziyar Etemadi说,这项研究结果代表了朝着早期发现乳腺癌的方向迈出的一大步。他是研究作家之一,居住在芝加哥的西北医学。

The team included researchers at Imperial College London and Britain's National Health Service. Together, they trained the AI system to identify breast cancers on tens of thousands of mammograms.


They then compared the AI system's performance with the actual results from a set of 25,856 mammograms in the United Kingdom and 3,097 from the United States.


The study showed the AI system could identify cancers with a similar level of accuracy to expert radiologists. At the same time, it reduced the number of false positive results by 5.7 percent in the American patients and 1.2 percent in the British patients.



It also cut the number of false negatives, where tests are wrongly listed as normal, by 9.4 percent in the American group, and 2.7 percent in the British group.


These results show differences in how mammograms are read. In the U.S., only one radiologist reads the results and the tests are done every one to two years. In Britain, the tests are done every three years, and each is read by two radiologists. When they disagree, a third radiologist reads it.


Seeing the signs


In a separate test, the researchers put the AI system against six radiologists and found it performed better at correctly detecting breast cancers.


Connie Lehman is chief of the breast imaging department at Harvard's Massachusetts General Hospital. She said the results agree with findings from many groups using AI to improve cancer detection in mammograms, including her own work.

康妮·莱曼(Connie Lehman)是哈佛大学麻萨诸塞州综合医院乳房影像科的负责人。她说,结果与许多小组的研究结果相吻合,这些小组使用AI来改善乳房X线照片中的癌症检测,包括她自己的工作。

The idea of using computers to improve cancer detection has been around for years. And computer-aided detection or CAD systems are common in mammography health centers, but CAD has not improved performance in health practice.


The issue, Lehman said, is that current CAD programs were trained to identify things human radiologists can see. But with AI, computers learn to find cancers based on the actual results of thousands of mammograms. So AI has the possibility of going beyond human ability to identify small signs the human eye and brain cannot.


Mozziyar Etemadi added that the study has shown, in tens of thousands of mammograms, that AI can "make a very well-informed decision."

Mozziyar Etemadi补充说,该研究已经在成千上万的乳房X线照片中显示出AI可以“做出非常明智的决定”。

A few limitations


The study has some limitations. Most of the tests were done using the same type of imaging equipment, and the U.S. group had a lot of patients with confirmed breast cancers.


Importantly, the team has not yet shown that the tool improves patient care, said Dr. Lisa Watanabe. She is chief medical officer of CureMetrix, a company whose AI mammogram program won U.S. approval last year.

重要的是,团队尚未显示该工具可以改善患者的护理,Lisa Watanabe博士说。她是CureMetrix的首席医疗官,该公司的AI乳房X线照片程序去年获得了美国的批准。

She noted that AI is only helpful if it creates noticeable progress for radiologists.


Etemadi agreed that those studies are needed, as is regulatory approval, a process that could take many years.



Words in This Story:

radiologist – n. a doctor whose expertise is using some forms of radiation (such as X-rays) to diagnose and treat diseases

mammogram – n. a photograph of a woman's breasts made by X-rays

accuracy – n. the quality of having no errors or mistakes

detection – n. the act or process of discovering, finding, or noticing something

false positive – n. a test result which incorrectly indicates that a particular condition is present

false negative – n. a test result which incorrectly indicates that a particular condition is absent


改变美国的器官移植系统 Changing America’s System for Organ Transplants

中国有止痛药成瘾者,但没人在指望他们 China Has Painkiller Addicts, But No One Is Counting Them