中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (6): 1384-1389.doi: 10.12307/2026.557

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

低剂量CT技术实现颌面骨3D打印辐射剂量优化的可行性

李  冠1,王昊鹏2,王金宝2,宋馨昊1,秦国初1,邵  扬3   

  1. 1南京大学医学院附属鼓楼医院医学影像科,江苏省南京市  210008;北部战区总医院,2放射诊断科,3口腔科,辽宁省沈阳市  110000

  • 收稿日期:2024-09-06 接受日期:2025-02-11 出版日期:2026-02-28 发布日期:2025-07-14
  • 通讯作者: 邵扬,硕士,副主任医师,北部战区总医院口腔科,辽宁省沈阳市 110000
  • 作者简介:李冠,男,1984年生,汉族,辽宁省沈阳市人,博士后,副主任医师,主要从事低剂量CT技术及3D打印方面的研究。

Feasibility of optimizing radiation dose for three-dimensional printing of the maxillofacial bone based on low-dose CT technology

Li Guan1, Wang Haopeng2, Wang Jinbao2, Song Xinhao1, Qin Guochu1, Shao Yang3   

  1. 1Department of Radiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China; 2Department of Radiology, 3Department of Stomatology, General Hospital of Northern Theater Command, Shenyang 110000, Liaoning Province, China
  • Received:2024-09-06 Accepted:2025-02-11 Online:2026-02-28 Published:2025-07-14
  • Contact: Shao Yang, MS, Associate chief physician, Department of Stomatology, General Hospital of Northern Theater Command, Shenyang 110000, Liaoning Province, China
  • About author:Li Guan, PhD, Associate chief physician, Department of Radiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, Jiangsu Province, China

摘要:


文题释义:
3D打印:也称为增材制造,是一种基于数字模型文件,通过逐层打印的方式来构造物体的技术。它使用粉末状金属或塑料等可黏合材料,通过逐层堆叠的方式构建三维实体。
低剂量CT技术:是相对于常规CT扫描而言的一种CT检查,即通过降低管电压或管电流、增加螺距、新型探测器材料、图像重建算法等方法,在图像质量满足诊断的同时,降低CT辐射剂量,从而减少辐射暴露。

背景:颌面骨3D打印技术已被广泛应用于临床诊疗中,但行颌面骨3D打印前的数据源主要来源于医用CT机扫描后所生成的数据,因人体晶状体、甲状腺等部位对X射线极为敏感,因此有效降低数据源获取时的CT辐射剂量显得尤为重要。
目的:探究低剂量CT技术应用于颌面骨3D打印辐射剂量优化的可行性。
方法:回顾性收集2021年3月至2023年12月北部战区总医院口腔科行颌面骨3D打印的病历资料65例,分为常规CT剂量3D打印组(常规CT剂量,120 kVp、自动管电流调制,n=32)和低CT剂量3D打印组(低CT剂量组,80 kVp、自动管电流调制,n=33)。计算并比较常规CT剂量组和低CT剂量组的辐射有效剂量;采用李克特量表法对两组3D打印的质量进行评价,评价者之间的测量偏差和一致性程度采用Bland-Altman图法。
结果与结论:①两组患者的一般人口学特征(年龄、身高、体质量、性别及体质量指数)相比差异无显著性意义(均P > 0.05);②低CT剂量组的辐射有效剂量值(0.3±0.1) mSv较常规CT剂量组(0.8±0.1) mSv降低约62.5%;③常规CT剂量组和低CT剂量组的3D打印质量主观评分相比差异无显著性意义(均P > 0.05);评价者间的主观一致性较好,Kappa值分别为0.85,0.80和0.76;两组方案的Bland-Altman图散点均在标准差线内均匀分布,说明两组一致性好;④提示低剂量CT技术可有效应用于颌面骨3D打印中,在不影响颌面骨3D打印质量的同时可有效减少辐射剂量。
https://orcid.org/0000-0002-3353-993X(李冠)

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 低剂量, 计算机断层扫描, 3D打印, 颌面骨, 辐射剂量优化

Abstract: BACKGROUND: Maxillofacial bone three-dimensional (3D) printing technology has been widely used in clinical diagnosis and treatment, but the data source before performing maxillofacial bone 3D printing mainly comes from the CT scanning data. The lens, thyroid and other parts of the human body are extremely sensitive to X-rays; therefore, it is particularly important to effectively reduce the dose of CT radiation when acquiring the data source.
OBJECTIVE: To explore the feasibility of low-dose CT technology in optimizing radiation dose for maxillofacial bone 3D printing. 
METHODS: The medical records of 65 patients who underwent maxillofacial bone 3D printing in the Department of Stomatology at the General Hospital of Northern Theater Command from March 2021 to December 2023 were retrospectively collected and categorized into a conventional CT-dose 3D printing group (conventional CT-dose, 120 kVp, automated tube current modulation, n=32) and a low-CT-dose 3D printing group (low-CT-dose group, 80 kVp, automated tube current modulation, n=33). The effective dose of radiation was calculated and compared between the two groups. A Likert scale was used to evaluate the quality of 3D printing in the two groups, and the measurement bias and consistency between evaluators were measured using the Bland-Altman method. 
RESULTS AND CONCLUSION: (1) There was no significant difference in the general demographic characteristics (age, height, weight, body mass, sex, and body mass index) between the two groups (all P > 0.05). (2) The effective dose value of the low CT-dose 3D printing group was (0.3±0.1) mSv, which was about 62.5% lower than that in the conventional CT-dose 3D printing group [(0.8±0.1) mSv]. (3) There was no significant difference in the subjective scoring of 3D printing quality between the two groups (all P > 0.05). The subjective consistency among evaluators was good, with Kappa values of 0.85, 0.80, and 0.76. The scatter points in the Bland-Altman for both protocols were uniformly distributed within the standard deviation line, indicating good consistency between the two groups. To conclude, low-dose CT technology can be effectively applied in maxillofacial bone 3D printing, reducing radiation dose without affecting the quality of 3D printing.

Key words: low-dose, computer tomography, 3D printing, maxillofacial bone, radiation dose optimization

中图分类号: