In actual practice, measuring instruments do not directly determine the number of roentgens.
在实际应用时, 测量仪器并不能直接测定伦琴数。
The radiation background is up to500 microroentgens hour.
辐射本底高达每小时500微伦琴。
A roentgenographic study of the sesamoid bones of the feet
足籽骨的放射片研究
Methods Esophagography and doublecontrast roentgenography were performed in 15 patients with infraluminal esophageal carcinoma.
方法15例腔内型食管癌均为手术病理证实。
Cephalometric roentgenogram.
头影侧位片
lateral position roentgenography of mandible
下颌骨侧位投照术
Clinical Application on Digital Orthopantomography and Cephalometric Roentgenography
曲面断层片、头影测量片数字化摄影技术在临床中的应用
The distinct roentgenographic features of surface osteosarcomas
表面骨肉瘤的影像学特征
Roentgen, French physicist got a good credit as a child, but he is naughty.
法国物理学家伦琴小时候学习成绩很好，但很顽皮。
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