摘要
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。
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.
作者
解景舒
张祥林
刘金磊
文静
Xie Jingshu;Zhang Xianglin;Liu Jinlei;Wen Jing(The First Affiliated Hospital of Jinzhou Medical University,Jinzhou 121000,Liaoning Province,China;Clinical Department of Shenyang Campo Imaging Technology Co.,Ltd.,Shenyang 110000,Liaoning Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2021年第23期3614-3618,共5页
Chinese Journal of Tissue Engineering Research
关键词
CT
精密断层
扫描
中耳成像
内耳成像
重建算法
影像
CT
precision tomography
scanning
middle ear imaging
inner ear imaging
reconstruction algorithm
imaging
作者简介
第一作者: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。https://orcid.org/0000-0002-2270-336X;通讯作者:张祥林,硕士,教授。
