text_1: 符合 以下 条件 的 患者 被 排除 : 年龄 小于 18 岁 , 接受 过 24 小时 全 剂量 抗凝 治疗 , 在 过去 21 天内 接受 过大 手术 , 在 评估 C - PTP 之前 已知 d - 二聚体 水平 , 接受 过 违反 研究 方案 的 胸部 影像学 检查 ( 即 在 记录 C - PTP 之前 接受 过 检查 , 或者 在 C - PTP 低且 d - 二聚体 水平 < 1 , 000 ng / mL , 或者 C - PTP 中等 且 d - 二聚体 水平 < 500 ng / mL 的 情况 下 接受 过 检查 ) , 因 其他 原因 接受 过 胸部 增强 CT 扫描 , 需要 持续 接受 抗凝 治疗 , 预期 寿命 不到 3 个 月 , 处于 妊娠期 , 或者 由于 地理 原因 难以 接受 随访 .
  
text_2: patients were excluded if they were younger than 18 years of age , had received full @-@ dose anticoagulant therapy for 24 hours , had undergone major surgery in the past 21 days , had a d @-@ dimer level that was known before the C @-@ PTP was assessed , had undergone chest imaging contrary to the protocol ( i.e. , before the C @-@ PTP was documented , or despite having a d @-@ dimer level of < 1000 ng per milliliter for a low C @-@ PTP or < 500 ng per milliliter for a moderate C @-@ PTP ) , had undergone contrast @-@ enhanced CT of the chest for another reason , had an ongoing need for anticoagulant therapy , had a life expectancy of less than 3 months , or were pregnant or geographically inaccessible for follow @-@ up .
  