Medical Convergence Research Center, Wonkwang University, Iksan, Jeonbuk, South Korea.
Department of Radiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, South Korea.
J Xray Sci Technol. 2019;27(5):907-918. doi: 10.3233/XST-190514.
Intraoperative computed tomography (iCT) system has been developed focusing on combining the advanced imaging techniques for the best imaging modality. However, the use of iCT system in the operating rooms is limited due to the lack of flexible mobility.
This study aims to develop a mobile iCT imaging system and assess its imaging performance in a phantom study.
The mobile iCT system with mecanum omni-directional wheels has three major components namely, a rotating gantry, a slip-ring and a stationary gantry. Performance of mecanum iCT system was evaluated using the indices of signal-to-noise (SNR), contrast-to noise (CNR), and spatial resolution (MTF). Anatomical landmarks on phantom images were assessed using a 5-point scale (5 = definitely seen; 4 = probably seen; 3 = equivocal; 2 = probably not seen; and 1 = definitely not seen).
The mecanum iCT system can be conveniently used for a whole-body scan under intraoperative conditions even in narrow operating rooms due to a smaller turning radius. The image quality of the mecanum iCT system was found to be acceptable for clinical applications (with SNR = 162.72, CNR = 134.29 and MTF = 694 μm). The diagnostic scores on the phantom images were 'definitely seen' value.
The proposed mecanum iCT system achieved the improved flexible mobility and has potential to better serve as a useful imaging tool in the clinical intraoperative setting.
术中计算机断层扫描（iCT）系统的开发重点是结合先进的成像技术，以获得最佳的成像方式。然而，由于缺乏灵活的机动性，iCT 系统在手术室中的应用受到限制。
本研究旨在开发一种移动 iCT 成像系统，并在体模研究中评估其成像性能。
带麦克纳姆全方位轮的移动 iCT 系统有三个主要组成部分，即旋转龙门架、滑环和固定龙门架。使用信噪比（SNR）、对比噪声比（CNR）和空间分辨率（MTF）等指标来评估麦克纳姆 iCT 系统的性能。使用 5 分制（5=肯定能看到；4=可能能看到；3=模棱两可；2=可能看不到；1=肯定看不到）评估体模图像上的解剖学标志。
由于转弯半径较小，麦克纳姆 iCT 系统可以方便地在术中条件下进行全身扫描，即使在狭窄的手术室中也可以。麦克纳姆 iCT 系统的图像质量被认为可用于临床应用（SNR=162.72，CNR=134.29，MTF=694 μm）。体模图像上的诊断评分均为“肯定能看到”。
所提出的麦克纳姆 iCT 系统实现了改进的灵活机动性，有潜力成为临床术中环境中的一种有用的成像工具。
