【摘要】 198 1年FCR研制成功后 ,最近几年ES又相继问世。由于ES良好的成像性能而得到了广泛地认可。通过ES系统的加权处理可以分别得到胸部组织的复合像、软组织像和骨骼像 ,从而使得与骨骼或软组织重叠的软组织或骨骼单独、清晰地显示 ,提高病变的检出效率。由于后成像板接受的剂量低 ,影像噪声大 ,必须通过增加曝光量的方法提高影像的质量 ,因此 ,ES的辐射剂量较高。更多还原

【Abstract】 FCR had been manufactured in 1981 successfully,and then did the Energy Subtraction. The ES technique was accepted widely because of it’s wonderful imaging characteristics. The combined chest image, soft tissue image and ribs’image have been achieved by means of weighted processing respectively, The ratio of disease checking out raised obviously.To reduce the image noise of ES,the radiation dosage is more than usually used.更多还原