碘克沙醇联合低电压CT扫描孤立性肺结节成像质量的评价

发布时间：2018-06-26 21:43

本文选题：辐射剂量 + 对比剂　；参考：《实用医学杂志》2017年24期

【摘要】：目的探索等渗低浓度对比剂(碘克沙醇270 mg I/L)、低电管压(100 kV)联合迭代重建技术在扫描孤立性肺结节成像质量中应用的可行性。方法收集本院从2015年2月至2017年2月行常规检查并行病理确诊的孤立性结节病患40例,按随机原则分为常规组(350 mg I/L,120 kV管电压,图像利用滤波反投影重建,n=20)和双低组(270 mg I/L,100 kV管电压,图像利用迭代重建,n=20)。结果主观评分中,双低组患者的主观评分为(4.01±0.54)分,常规组患者的主观评分为(3.97±0.57)分,差异无统计学意义(P0.05)。客观评分中,常规组与双低组取相同部位的CT值,计算所得平均值差异无统计学意义(P0.05),两组的SNR和CNR差异也无统计学意义(P0.05)。双低组患者DLP[(283.52±11.50)mGy/cm]和ED[(3.65±0.32)mSV]均低于常规组DLP[(370.74±29.56)mGy/cm]和ED[(5.11±0.25)mSV],差异具有统计学意义(P0.05)。结论双低结合迭代重建技术可在降低辐射剂量、碘造影剂浓度的基础上,满足临床诊断孤立性肺结节的CT图像质量要求。
[Abstract]:Objective to explore the feasibility of Isoosmotic low concentration contrast agent (iodoxacin 270 mg I / L) and low electric tube pressure (100 kV) combined with iterative reconstruction in the imaging quality of solitary pulmonary nodules (SPN). Methods from February 2015 to February 2017, 40 patients with solitary nodule diagnosed by routine examination and pathological diagnosis were collected and randomly divided into two groups (350 mg I / L + 120 kV voltage). The image is reconstructed by filtering backprojection and double low group (270 mg / L ~ (100 kV) voltage), and the image is reconstructed by iterative reconstruction (n ~ (20). Results in the subjective score, the subjective score was (4.01 卤0.54) in the double low group and (3.97 卤0.57) in the routine group. There was no significant difference between the two groups (P0.05). In the objective score, the CT value of the same part in the routine group and the double low group was not significantly different (P0.05), and the SNR and CNR of the two groups were not statistically significant (P0.05). The levels of DLP [(283.52 卤11.50) mGy / cm] and Ed [(3.65 卤0.32) mSV] in double low group were significantly lower than those in normal group [(370.74 卤29.56) mGy / cm] and Ed [(5.11 卤0.25) mSV] (P0.05). Conclusion double low combined with iterative reconstruction technique can meet the requirements of CT image quality in clinical diagnosis of solitary pulmonary nodules on the basis of reducing radiation dose and iodine contrast medium concentration.
【作者单位】：武汉市第三医院放射科;武汉市医学会;国家肿瘤临床医学研究中心天津医科大学肿瘤医院放射科;湖北中医药大学针灸骨伤学院;
【基金】：武汉市卫生计生委科研计划资助项目(编号:WX16D12)
【分类号】：R730.44;R734.2

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