Low-radiation dose scan protocol for preoperative imaging for dental implant surgery using deep learning-based reconstruction in multidetector CT
Low-radiation dose scan protocol for preoperative imaging for dental implant surgery using deep learning-based reconstruction in multidetector CT
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DOI：
10.1007/s11282-021-00584-w
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发表时间：
2022-01-29
期刊：
影响因子：
2.2
通讯作者：
Yoshiura, Kazunori
中科院分区：
文献类型：
--
作者：
Sakai, Yuki;Kitamoto, Erina;Yoshiura, Kazunori
目的本研究旨在研究基于深度学习的重建（DLR）技术对图像质量和减少辐射暴露的影响，并提出一种用于牙科种植手术术前成像的低剂量多探测器行计算机断层扫描（MDCT）扫描方案。方法使用320排MDCT扫描机对PB-1体模和Catphan 600体模进行容积扫描。所有扫描均在120 kV管电压下进行，管电流在120 - 60 - 40 - 30 mA之间变化。使用DLR重建下颌骨图像。此外，使用滤波反投影作为参考，重建使用120 mA协议采集的图像。两名观察员使用4分量表对下颌骨图像的图像质量进行独立分级（4分，上级; 1分，不可接受）。计算系统性能函数（SPF），综合评价图像质量。采用Wilcoxon符号秩检验进行统计分析，统计学显著性设定为p值< 0.05。结果采用40 mA管电流和DLR技术（40 DLR）重建的图像质量与参考协议（3.00，3.00，p = 1.00）的图像质量无显著差异。与参考方案相比，使用40 DLR获得的1.0个循环/mm的SPF提高了156.7%。结论我们提出的方案，实现了三分之二的辐射剂量减少，可以提供一个微创MDCT扫描的图像质量可接受的牙科种植手术。
Objectives This study aimed to investigate the impact of a deep learning-based reconstruction (DLR) technique on image quality and reduction of radiation exposure, and to propose a low-dose multidetector-row computed tomography (MDCT) scan protocol for preoperative imaging for dental implant surgery. Methods The PB-1 phantom and a Catphan phantom 600 were scanned using volumetric scanning with a 320-row MDCT scanner. All scans were performed with a tube voltage of 120 kV, and the tube current varied from 120 to 60 to 40 to 30 mA. Images of the mandible were reconstructed using DLR. Additionally, images acquired with the 120-mA protocol were reconstructed using filtered back projection as a reference. Two observers independently graded the image quality of the mandible images using a 4-point scale (4, superior to reference; 1, unacceptable). The system performance function (SPF) was calculated to comprehensively evaluate image quality. The Wilcoxon signed-rank test was employed for statistical analysis, with statistical significance set at p value < 0.05. Results There was no significant difference between the image quality acquired with the 40-mA tube current and reconstructed with the DLR technique (40DLR), and that acquired with the reference protocol (3.00, 3.00, p = 1.00). The SPF at 1.0 cycles/mm acquired with 40DLR was improved by 156.7% compared to that acquired with the reference protocol. Conclusions Our proposed protocol, which achieves a two-thirds reduction in radiation dose, can provide a minimally invasive MDCT scan of acceptable image quality for dental implant surgery.