นักรังสีวิทยาในสหรัฐฯ ใช้เครื่องอัลตร้าซาวด์ตรวจคัดกรองมะเร็งทรวงอก
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Early detection of breast cancer saves lives. Breast cancer is the most common cancer in women worldwide. As VOA's Carol Pearson reports, scientists are working on finding new ways to detect breast cancer while they are studying existing screening methods to find out what is best.