【摘要】 以传统2mm厚的铝和0.1mm厚的铜与0.15mm厚的不锈钢滤片,在机器负荷较不用滤片时高1.25倍的相同曝光条件下,进行比较。发现在使用不锈钢滤片下,患者受到的放射量最少;使用不同滤片所取得的照片密度无明显差别,但MTF值则以不锈钢滤片优于其他滤片。作者认为尤其对易受放射作用损害的,诸如眼睛和睾丸等部位进行摄片时,如采用不锈钢滤片,对减少患者的照射量是有价值的。更多还原

【Abstract】 Under the game exposure condition and the same tube loading, which was 1.25 times higher than that when no filter was used, the efficacy in reducing patient radiation dose of the conventionally used 2mm thick aluminum and 0.1mm thick copper filters were compared with that of the 0.15 mm thick stainless steel filter. The patient radiation dose was the lowest with the stainless steel filter. There was no appreciable difference in film density when either of these filters wag used. But MTF of stainless steel filter was better than that of any other two filters.We conclude that the stainless steel filter was more efficacious in reducing patient radiation dose than the conventional aluminum or copper filter, and was especially suitable for regions such as the eye and testis, which are vulnerable to radiation injury.更多还原