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作者对44例病人行颈部螺旋CT扫描,男32例,女12例,年龄16~82岁。下咽部无病变者39例,有病变者5例。使用CT管电压120kV,管电流200mA,窗位20~25HU。使用300mgl/ml的非离子型对比剂100ml,以2ml/s的速度静脉注入,50s后首先在平静吸气时摄影,行5mm层厚连续扫描。然后嘱患者闭口、屏气增高口腔内压,即用Valsalva法行螺旋CT扫描,范围从舌骨到甲状软骨平面,层厚5mm,转动速度5 mm/s。由3名放射科医生读
The author of 44 patients underwent cervical spiral CT scan, 32 males and 12 females, aged 16 to 82 years. No hypopharyngeal lesions in 39 cases, 5 cases of lesions. Using CT tube voltage 120kV, tube current 200mA, window level 20 ~ 25HU. 100ml of 300mgl / ml non-ionic contrast agent was injected intravenously at a rate of 2ml / s. After 50s, it was first photographed under calm inhalation and scanned continuously for 5mm layer thickness. The patient was then instructed to close the mouth and hold the breath to increase the intra-oral pressure. The Valsalva’s helical CT scan ranged from the hyoid bone to the thyroid cartilage plane with a layer thickness of 5 mm and a rotational speed of 5 mm / s. Read by 3 radiologists