At the Indiana University Medical Center,two scientists are neither trying to apply PET to differentiate breast cancer tumors and cysts,which can be nearly indistinguishable with nor mal imaging methods.

• 在印地安纳州大学医学中心，两名科学家正试图用正电子发射X射线摄影技术，区分用正常的成像方法几乎无法辨别的几种疾病，如乳房癌、肿瘤和囊肿。