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目的 评价胸部螺旋CT应用小剂量对比剂的可行性。材料与方法 选择临床怀疑胸部肿块而申请CT检查 60例作为研究对象 ,采用 1ml/kg体重对比剂 (平均总量 5 9.5ml± 8ml)、3ml/s注射速度、2 5s延迟时间作全胸螺旋扫描。测量增强后纵隔血管、心脏和增强前后肿块的CT值。结果 上腔静脉CT值平均 2 65HU± 92HU ,升主动脉 193HU± 41HU ,肺动脉 15 1HU± 3 2HU ,左房15 8HU± 3 3HU ,降主动脉 199HU± 46HU ,与纵隔肺门的非血管结构密度差异明显。 2 8例肺癌肿块强化满意 ,平均增强 3 0HU。结论胸部螺旋CT应用小剂量对比剂能获得较为满意的纵隔血管和肺内肿块强化效果 ,具有推广应用价值。
Objective To evaluate the feasibility of using small dose contrast agent in chest spiral CT. Materials and Methods Sixty patients who applied for CT examination were selected as clinical suspicious thoracic masses and treated with 1ml / kg body weight contrast agent (mean volume 5 9.5ml ± 8ml), 3ml / s injection speed and 25s delay time scanning. After the measurement of enhanced mediastinal blood vessels, heart and enhanced CT value of the tumor before and after. Results The mean superior vena cava CT value was 65HU ± 92HU, ascending aorta 193HU ± 41HU, pulmonary artery 15 1HU ± 3 2HU, left atrium 15HUHU 3HHHU, descending aorta 199HU ± 46HU, and non-vascular structure density of mediastinal hilar The difference is obvious. 28 cases of lung cancer mass enhancement satisfaction, an average increase of 30HU. Conclusions Thoracic spiral CT can achieve more satisfactory enhancement of mediastinal and intrapulmonary masses with low-dose contrast agent, which has the value of popularization and application.