中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (23): 3614-3618.doi: 10.12307/2021.028

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

High Resolution精密断层重建在中、内耳CT扫描成像中的应用

解景舒1,张祥林1,刘金磊1,文  静2   

  1. 1锦州医科大学附属第一医院,辽宁省锦州市   121000;2沈阳开普影像技术有限公司临床部,辽宁省沈阳市   110000
  • 收稿日期:2020-06-05 修回日期:2020-06-06 接受日期:2020-07-20 出版日期:2021-08-18 发布日期:2021-01-26
  • 通讯作者: 张祥林,硕士,教授,锦州医科大学附属第一医院 ,辽宁省锦州市 121000
  • 作者简介:解景舒,女,1995年生,辽宁省兴城市人,汉族,2020年锦州医科大学毕业,硕士,主要从事中内耳影像诊断的研究。

Application of High Resolution reconstruction algorithm in precision CT scans of the middle and inner ears

Xie Jingshu1, Zhang Xianglin1, Liu Jinlei1, Wen Jing2   

  1. 1The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, Liaoning Province, China; 2Clinical Department of Shenyang Campo Imaging Technology Co., Ltd., Shenyang 110000, Liaoning Province, China
  • Received:2020-06-05 Revised:2020-06-06 Accepted:2020-07-20 Online:2021-08-18 Published:2021-01-26
  • Contact: Zhang Xianglin, Master, Professor, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, Liaoning Province, China
  • About author:Xie Jingshu, Master, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, Liaoning Province, China

摘要:

文题释义:
High Resolution重建算法:算法既借鉴普通轴扫,反投影时每一层使用相同的数据(因为只有1周的数据),也借鉴螺旋CT,反投影时使用螺旋CT的坐标计算公式以考虑精密断层的几何。
精密断层扫描:此次研究采用的扫描方法,既非普通轴扫又不是通常意义上的螺旋CT扫描,普通轴扫的螺距为零,机器扫描圈数为1周,螺旋CT扫描的螺距较大,机器扫描多周,而精密断层扫描螺距很小,机器扫描圈数为1周,通过使用现有产品的硬件配置,在断层扫时将床进行微小移动,从而提升扫描过程中的数据采样率。配合专用的HR精密断层重建算法,达到图像Z轴方向分辨率提升的效果。

背景:对于听骨链、肌肉、骨迷路、韧带等结构的影像学显示,常规薄层CT扫描难以达到最理想的效果。
目的:评估在中、内耳薄层CT扫描中以HR精密断层重建算法成像的图像质量和辐射剂量。
方法:21名志愿者(42耳)进行内耳薄层扫描,对于扫描后的图像全部以两种重建算法进行重建,将行0.275 mm HR精密断层重建的设为研究组;行0.55 mm常规薄层重建的设为对照组。利用多平面重建技术对图像进行处理,计算锤骨前韧带、砧骨后韧带、锤骨上韧带和锤骨外侧韧带的显示率,对听骨链、肌肉、骨迷路、韧带等结构的图像显示效果进行主观评分。记录容积CT剂量指数和剂量长度乘积,并计算有效剂量(ED)。研究方案的实施符合锦州医科大学附属第一医院的相关伦理要求。受试者对试验过程完全知情同意。
结果与结论:①HR精密断层重建和常规薄层重建的轴位及冠状位图像中所有解剖结构均可见(P > 0.05);②在轴位和冠状位的图像中,研究组中内耳部分结构的图像显示质量要明显优于对照组(P < 0.05);③中内耳精密断层扫描的有效剂量为(1.19±0.26) mGy;④结果说明,精密断层扫描图像分辨率高,同时能更清晰的观察到中、内耳各结构。
https://orcid.org/0000-0002-2270-336X(解景舒)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: CT, 精密断层, 扫描, 中耳成像, 内耳成像, 重建算法, 影像

Abstract: BACKGROUND: For the imaging of ossicular chains, muscles, bony labyrinths, ligaments and other structures, conventional thin-slice CT scans are difficult to achieve the most ideal results.
OBJECTIVE: To evaluate the image quality and radiation dose of High Resolution (HR) precise tomographic reconstruction algorithm in thin-layer CT scan of the middle and inner ears.
METHODS: Thin-layer scanning of the inner ear was performed in 21 volunteers. All scanned images were reconstructed by two reconstruction algorithms. The study group was reconstructed by 0.275 mm HR precision tomography, and the control group was reconstructed by 0.55 mm conventional thin layer. The images were processed by multiplanar reconstruction technology, and the display rates of anterior malleolar ligament, posterior anvil ligament, superior malleolar ligament and lateral malleolar ligament were calculated, and the image display effects of ossicular chain, muscle, labyrinthine and ligament were scored subjectively. The volume CT dose index volume and dose length product were recorded, and the effective dose was calculated. The study protocol was implemented in line with the ethic requirements of the First Affiliated Hospital of Jinzhou Medical University, and all the subjects were fully informed of the study procedures.
RESULTS AND CONCLUSION: All anatomical structures could be seen in axial and coronal images of HR precision tomography reconstruction and conventional thin-layer reconstruction (P > 0.05). In axial and coronal images, the display quality of the middle and inner ear structure in the study group was significantly better than that in the control group (P < 0.05). The effective dose of precision tomography in middle and inner ear was (1.19±0.26) mGy. To conclude, precision tomography has higher image resolution, by which we can observe the structures of the middle and inner ears more clearly.

Key words: CT, precision tomography, scanning, middle ear imaging, inner ear imaging, reconstruction algorithm, imaging

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