在PET/CT造影时，除了局部病灶的SUV外，病灶是否出现低衰减( low-attenuation)的情形，也是一项重要参考指标。但一些腺瘤、炎症也会出现局部18F_FDG高摄取。
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The low-attenuation regime 低衰减情况
Low Attenuation 低削弱
low attenuation cable 低衰减电缆
low-attenuation range 低衰减区 ; 低衰减范围
low attenuation zone 低衰减带
Low attenuation masses 低密度肿块
low-attenuation sinking plate 低衰减下沉板块
low-attenuation area percentage 低衰减区百分比
Ct usually demonstrates a high attenuation region surrounded by a halo of abnormally low attenuation, consistent with acute hemorrhage and secondary edema, respectively.
CT上经常显示一个高信号衰减区外周围绕一圈低信号衰减光晕，这种影像与相应的出血和继发性水肿是相一致的。
It has a rather high transmission frequency and low attenuation.
居有较高的传输频率和较低的衰减。
The optical fiber communication technique is well suited to a large delay time, due to the low attenuation and chromatic dispersion of the fiber, and to its high bandwidth.
通信技术中使用的光纤，由于其低耗与宽带特性，能较好地满足这种要求。
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