| 金瑞,曾勇明,刘先凡.基于蒙特卡罗数学模型两种脊柱全景X射线成像技术受检者辐射剂量的对比研究[J].中华放射医学与防护杂志,2015,35(10):792-796 |
| 基于蒙特卡罗数学模型两种脊柱全景X射线成像技术受检者辐射剂量的对比研究 |
| Patient radiation dose of spine X-ray panoramic imaging:Comparison of two techniques based on Monte Carlo mathematical model |
| 投稿时间：2015-03-05 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.10.019 |
| 中文关键词: 脊柱 X射线摄影 全景X射线成像 有效剂量 数学模型 |
| 英文关键词:Spine X-ray radiography X-ray panoramic imaging Effective dose Mathematical model |
| 基金项目:国家临床重点专科建设项目(国卫办医函[2013]544号) |
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| 中文摘要: |
| 目的 比较两种脊柱全景X射线成像技术对受检者产生的辐射剂量。方法 使用仿真体模进行实验,摸索出该体模在日本岛津Sonialvision safire17设备Slot scan脊柱全景成像的适宜成像条件,然后在GE Discovery XR650型DR系统上对该体模进行不同曝光条件的DR脊柱全景成像,3位有经验的放射科医生对两种成像技术的图像进行评分,选择图像质量评分均值最接近的对应成像参数为实验成像参数。将相关成像参数及X射线机信息输入PCXMC 2.0软件,计算受检者脊柱全景成像的器官吸收剂量和有效剂量。结果 Slot scan脊柱全景成像的适宜成像条件为高质量全景成像模式(HQ模式)、SID 150 cm、100 kVp和2 mAs, DR手动曝光模式脊柱全景成像相当图像质量的成像条件为SID 200 cm、100 kVp和3.2 mAs。Slot scan HQ模式、DR手动曝光模式和DR自动曝光模式脊柱全景成像的有效剂量(E)分别为(0.118 7±0.001 4)、(0.084 7±0.000 8)和(0.158 0±0.001 5) mSv,DR手动曝光模式的有效剂量明显低于其余2种模式(F=3 007.293,P<0.05);除乳腺以外,DR手动曝光模式的器官剂量均低于Slot scan HQ模式的器官剂量(P<0.05);除甲状腺、食管、肺以外,DR自动曝光模式的器官剂量均高于另外两种成像方式的器官剂量(P<0.05)。结论 两种手动全景成像技术的辐射剂量均处于较低水平,合理选择全景成像技术的曝光参数和模式可实现低剂量全景X射线成像。 |
| 英文摘要: |
| Objective To compare patient radiation dose of two techniques of spine X-ray panoramic imaging under the same image quality.Methods An anthropomorphic phantom was used. The reasonable imaging parameters were found for spine panoramic radiography using Sonialvision safire17 Slot scan with HQ mode. And the panoramic films were obtained with different parameters using GE XR650 DR system. The panoramic images were scored by three experienced radiologists. The imaging parameters with the same score in groups were input into PCXMC 2.0 software to get effective dose(E)and organ dose.Results The reasonable imaging parameters of Slot scan were high quality(HQ) mode, SID 150 cm, 100 kVp, and 2 mAs; and the corresponding parameters of XR650 were SID 200 cm, 100 kVp, and 3.2 mAs. The E of the Slot scan with HQ mode, XR650 with manual mode and XR650 with AEC mode was(0.118 7±0.001 4),(0.084 7±0.000 8), and (0.158 0±0.001 5) mSv respectively, while the E of XR650 with manual mode was lower than the others(F=3 007.293, P<0.05). The organ dose using XR650 DR with manual mode were lower than that using Slot scan with HQ mode in all samples except breasts(P<0.05); the organ dose using XR650 DR with AEC mode were higher than that using XR650 DR with manual mode and Slot scan with HQ mode for all samples except for thyroid, oesophagus and lungs(P<0.05).Conclusions The radiation doses of both spine X-ray panoramic imaging with manual mode are low, and low dose spine X-ray panoramic imaging can be achieved if reasonable parameters are used. |
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