实质期和延迟期的英文缩写？

英文缩写：stp

英文全称：Substantive period

中文音译：实质期

例句

1.周围型肺癌与炎性结节动脉期和实质期增强CT值和强化程度均无显著差异（P>0.05），两者强化形态相似。The carcinoma and the inflammation revealed no difference in degree and pattern between arterial and tangible enhancement ( P> 0.05).

2.方法：回顾分析经临床或病理证实的30例肝脓肿的动态增强各期CT表现，所有患者均进行了肝动脉期、门脉期和实质期肝脏3期动态增强CT检查。Methods: Multi-row detector CT findings of the plain scanning and triple-phase enhance scanning of the hepatic abscess in30 cases were retrospectively analyzed.

英文缩写：dl

英文全称：Delay period

中文音译：延迟期

1.火花点火发动机着火延迟期、燃烧持续期及NO x排放的数值模拟预测Numerical Simulation Predication for Ignition Delay, Combustion Duration and NO_x Emissions of SI Engines

2.CT、MRI增强后延迟期多表现为边缘强化或内部分隔样强化。On dynamic enhanced CT or MRI scan, most of lesions demonstrated peripheral enhancement or septal enhancement during delayed phase.