西门子Ysio DR放大系数对摄片辐射剂量控制的应用优势

摘要

Objective To investigate the application of SIEMENS Ysio DR amplification in the radiation dose reduction. Methods Totally 160 patients with similar heights and body shapes were divided equally into A,B,C and D groups,and then underwent radiological examinations with SIEMENS Ysio DR from September 2014 to May 2016.A and B groups went through right hand AP oblique examination with the same kV while different mAs, and C and D groups had chest posteroanterior examination with different kV and the same mAs. Image quality was regulated with the amplification coefficient, and then evaluated with double-blind method by two senior radiologists.Statistical analysis was executed over the values of mAs in A and B groups and those of kV in C and D groups. Results A group had the mAs value being(2.26 ±0.16)mAs, which was significantly different from that of B group [(4.05±0.19)mAs] (P<0.05);while C group had kV value being (104.79±6.39)kV, which was statistically different from that of D group [(83.48±3.67)kV] (P<0.05). Satisfactory image were obtained by regulation with amplication coefficient.There was no obvious difference between the image quality in either A and B groups or C and D groups(P>0.05).Based on the principle that low mAs resulted in low radiation dose and high kV lead to low effective dose,A group had the radiation dose lower than those of B group,and C group had the effective dose lower than those of D group. Conclusion SIEMENS Ysio DR has the photographing parameters regulated according to different sites and the amplification coefficient for enhancing image quality, which decreases X-ray radiation dose and effective dosage with the diagnosis results unaffected.%目的:探讨西门子Ysio DR放大系数对摄片辐射剂量控制的应用优势,以获得较优质的图像.方法:选择2014年9月至2016年5月需要进行西门子Ysio DR拍摄的患者160例,分A、B、C、D 4组,每组40例,患者身高和体型基本相似.A、B 2组采用相同的管电压(kV)、不同的管电流量(mAs)拍摄右手正斜位片,C、D 2组采用不同的kV、相同的低mAs拍摄胸部正位片.拍摄后使用放大系数对图像质量进行调节,经2名高年资放射科医师采用双盲法对图像质量进行评分,获得A、B 2组的mAs值,C、D 2组的kV值,进行统计学分析.结果:A、B 2组的mAs值分别为(2.26± 0.16)、(4.05±0.19)mAs,C、D 2组的kV值分别为(104.79±6.39)、(83.48±3.67)kV,差异均有统计学意义(P<0.05).使用放大系数调节图像后,均能获得较优质图像.A、B、C、D 4组的图像质量评分差异均无统计学意义(P>0.05).根据低mAs摄片辐射剂量小、高kV摄片患者吸收有效剂量小的原理,A组辐射剂量低于B组,C组患者吸收的有效剂量低于D组.结论:使用西门子Ysio DR摄片,可以根据不同摄片部位适当调整相应摄片参数,并用放大系数对图像进行调节,提高了图像质量,在不影响诊断的情况下,减少了X线辐射剂量或患者吸收的有效剂量.