基于不同增强处理技术的DR图像质量优化分析  

The optimized analysis of low dose DR image quality based on different enhancement processing techniques

作　　者：闫军[1] 韩炜[1] 张利 YAN Jun;HAN Wei;ZHANG Li(Department of Computed Tomography, Yanan University Affiliated Hospital, Yan'an 716000, China)

机构地区：[1]延安大学附属医院CT室,陕西延安716000 [2]延安市中医医院影像科,陕西延安716000

出　　处：《中国医学装备》2017年第12期39-42,共4页China Medical Equipment

基　　金：陕西省延安市科学技术研究发展计划(2015HM-04-02)"高场强磁共振对胎儿脑发育及畸形的诊断研究"

摘　　要：目的:利用图像增强技术对低剂量摄影图像进行处理,探讨数字X射线摄影(DR)图像质量优化方案。方法:选择胸部影像中的5个有临床意义的组织结构信息作为参考点,与设定的病灶信息进行比较性测量,应用灰度变换、平滑降噪和锐化3种增强处理技术对低剂量摄影图像进行处理,通过客观评价和主观评价比较处理后图像与参考图像,并进行差异性和相关性统计分析。结果:应用3种增强处理技术可以有效地提高图像的对比噪声比,综合优化处理后的低剂量摄影图像可以满足临床诊断需要,与参考图像一致性较高,其差异有统计学意义(r=0.943,P<0.05);在差异性方面,原始图像与参考图像的相比,两者相比差异有统计学意义(Z=-2.21359,P<0.05),经过综合优化处理之后,原始图像与参考图像的差异性不显著,而在相关性方面,综合处理优化图像与参考图像相似度较高,两者相比差异有统计学意义(r=0.871,P<0.05)。结论:图像增强处理技术可以有效地改善低剂量摄影图像存在的不足,提高图像质量,降低临床患者的辐射剂量,具有较高的临床应用价值。Objective:To explore optimized scheme of digital radiography(DR)image quality through applied image enhancement technique to process the low-dose radiographic images.Methods:The five informations of tissue structure with clinical significance in chest image were selected as reference points,and they were relatively measured with setting lesion information.Three enhanced techniques included of grey level transformation,smoothly denoising and sharpening were applied to process low dose photographic image.The objective and subjective evaluations were applied to compare the reference image and post-processed image,and the difference and relative analysis between them were applied to obtain statistical results.Results:All of the three enhancement processing techniques can effectively enhance the contrast noise ratio of images.Therefore,the low-dose photographic image that was comprehensive optimized could satisfy the requirement of clinical diagnosis,and the higher consistency between them and reference images was significant(r=0.943,P<0.05).On the aspect of difference,the difference between original image and reference image was significant(Z=-2.21359,P<0.05).While after comprehensive optimization,the difference between them was no significant.On the other hand,the difference of correlation between the two kinds of images was significant(r=0.871,P<0.05).Conclusion:The image enhancement processing technique can effectively improve the deficiency of lowdose photographic image,and enhance image quality,and reduce radiation dose of clinical patients.Therefore,it has higher value in clinical practice.

关 键 词：增强处理 低剂量 对比噪声比 图像质量 数字化X射线摄影 

分 类 号：R812[医药卫生—放射医学]