VOA慢速英语:医生有了诊断乳腺癌的新工具

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

radiologist – n. a doctor who is trained in the branch of medicine that uses some forms of radiation (such as X-rays) to diagnose and treat diseases

dimensional – adj. the length, width, height, or depth of something

dense – adj. having parts that are close together

ultrasound – n. a method of producing images of the inside of the body by using a machine that produces sound waves which are too high to be heard