NewTom VG口腔颌面锥形束CT的辐射剂量分析

发布时间：2018-04-15 03:20

本文选题：NewTom + VG　；参考：《全科口腔医学电子杂志》2016年06期

【摘要】：目的探究New Tom VG口腔颌面锥形束CT的辐射剂量。方法基于不同参数设置下,测量New Tom VG对仿头模扫描时的吸收剂量,将吸收剂量转化为等效剂量,分别采用国际放射防护委员会(International Congress on Radiation Protection,ICRP)1990和2007年推荐的组织权重因子,对有效剂量进行计算,并统计分析不同扫描参数下的有效剂量。结果将扫描设置于标准模式下,扫描视野为15×15,15×12,12×8,8×8(直径×高度,cm),其所对应的有效剂量(ICRP2007)分别为:119、96、78和65微希沃特(u Sv),可见,有效剂量大小与扫描视野呈现出正相关关系。将扫描设置于高分辨模式条件下,12×8,8×8为扫描视野,其所对应的有效剂量为304、262,相较于标准模式,呈现出显著增高趋势,差异有统计学意义(P0.05)。结论在执行不同扫描任务时,New Tom VG口腔颌面锥形束CT所提供的辐射剂量存在差异,较低的扫描参数可降低New Tom VG口腔颌面锥形束CT辐射剂量。
[Abstract]:Objective to investigate the radiation dose of New Tom VG conical beam CT.Methods the absorptive dose of New Tom VG was measured under different parameters, and the absorbed dose was converted into equivalent dose. The tissue weight factors recommended by the International Committee on Radiological Protection (IRP) in 1990 and 2007 were used, respectively.The effective dose was calculated and the effective dose under different scanning parameters was analyzed statistically.Results the scanning visual field was 15 脳 15 ~ 15 ~ 15 脳 12 脳 8 ~ 8 脳 8 脳 8 (diameter 脳 height / cm ~ (-1)). The corresponding effective dose of ICRP _ (2007) was: 1 / 119 / 96 / 78 and 65 ~ (- 5) 渭 s / v ~ (-1), respectively. It can be seen that there is a positive correlation between the effective dose and the scanning field of vision.The scanning field was 12 脳 8 脳 8 脳 8 under the condition of high resolution mode. The effective dose was 304262. Compared with the standard mode, the scan showed a significant increase trend, and the difference was statistically significant (P 0.05).Conclusion there are differences in radiation dose provided by New Tom VG conical beam CT in different scanning tasks, and the lower scanning parameters can reduce the radiation dose of New Tom VG conical beam CT in oral and maxillofacial cavity and maxillofacial cavity.
【作者单位】：合肥市口腔医院放射科;
【分类号】：R816.98

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