摘要:目的探讨不同呼吸时相屏气及适当增加层厚,减少屏气时间对钆塞酸二钠肝脏增强磁共振动脉期图像质量的影响。方法回顾性分析采用钆塞酸二钠行肝脏增强磁共振扫描患者219例,其中同样采用3 mm层厚下平静呼吸屏气(69例)与深吸气屏气(78例)进行比较,此外,同样在深吸气屏气采用层厚为3 mm(78例)及4 mm(72例)进行比较,由2名副高以上诊断医师对图像进行评估,各期像图像均无呼吸运动伪影为优,仅有动脉早期或晚期出现伪影的为良,早晚期均出现伪影的为差。结果 3 mm层厚下,平静呼吸屏气图像质量优:中:差分别为17:30:22(24.6%:43.5%:31.9%),深吸气屏气图像质量优:中:差分别为:32:35:11(41.0%:44.9%:14.1%),深吸气屏气层厚为3 mm图像质量优:中:差分别为32:35:11(41.0%:44.9%:14.1%),层厚为4 mm图像质量优:中:差分别为:41:22:9(56.9%:30.6%:12.5%)。结论采用深吸气屏气,同时适当增加采集层厚可降低出现呼吸运动伪影的机率,从而提高影像质量。
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