Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Kepala Batas, Penang, Malaysia; Department of Physics, Federal University Lokoja, PMB 1154 Lokoja, Kogi State, Nigeria.
Advanced Medical and Dental Institute, Universiti Sains Malaysia, 13200 Kepala Batas, Penang, Malaysia.
Radiography (Lond). 2023 May;29(3):533-538. doi: 10.1016/j.radi.2023.02.028. Epub 2023 Mar 11.
The daily image quality assessment involves large datasets that consume a lot of time and effort. This study aims to evaluate a proposed automated calculator for image distortion analysis in 2-dimensional (2D) panoramic imaging mode for a dental cone beam computed tomography (CBCT) system in comparison with present manual calculations.
A ball phantom was scanned using panoramic mode of the Planmeca ProMax 3D Mid CBCT unit (Planmeca, Helsinki, Finland) with standard exposure settings used in clinical practice (60 kV, 2 mA, and maximum FOV). An automated calculator algorithm was developed in MATLAB platform. Two parameters associated with panoramic image distortion such as balls diameter and distance between middle and tenth balls were measured. These automated measurements were compared with manual measurement using the Planmeca Romexis and ImageJ software.
The findings showed smaller deviation in distance difference measurements by proposed automated calculator (ranged 3.83 mm) as compared to manual measurements (ranged 5.00 for Romexis and 5.12 mm for ImageJ software). There was a significant difference (p < 0.05) on the mean measured ball diameter between automated and manual measurement. For ball diameter measurement, there is a moderate positive correlation between automated measurement with the manual measurements (r = 0.6024 and r = 0.6358 for Romexis and ImageJ, respectively). However, there is a negative correlation between automated measurement for the distance difference with manual methods (r = -0.3484 and r = -0.3494 for Romexis and ImageJ, respectively). There was a good approximation between automated and ImageJ measurement of ball diameter in comparison to reference value.
In conclusion, the proposed automated calculator provides faster method with an accurate and acceptable results for daily-basis image quality test in dental panoramic mode of a Dental CBCT imaging system in comparison to current manual method.
An automated calculator is recommended for image distortion analysis on phantom images in routine image quality assessment for dental panoramic mode of Dental CBCT imaging system that may involve analysis of large image datasets. It offers improvement in routine image quality practice in term of time and accuracy.
日常的图像质量评估涉及到大量数据集，需要耗费大量的时间和精力。本研究旨在评估一种用于比较目前手动计算的二维（2D）全景成像模式下牙科锥形束 CT（CBCT）系统的图像失真分析的自动计算器。
使用 Planmeca ProMax 3D Mid CBCT 设备的全景模式扫描球型模体（Planmeca，赫尔辛基，芬兰），使用临床实践中的标准曝光设置（60kV，2mA 和最大 FOV）。在 MATLAB 平台上开发了一种自动计算器算法。测量与全景图像失真相关的两个参数，如球的直径和中间球与第十球之间的距离。这些自动测量结果与使用 Planmeca Romexis 和 ImageJ 软件的手动测量进行比较。
研究结果表明，与手动测量相比，所提出的自动计算器在距离差异测量方面的偏差较小（范围为 3.83mm）。在自动和手动测量之间，测量的球直径存在显著差异（p<0.05）。对于球直径测量，自动测量与手动测量之间存在中度正相关（分别为 r=0.6024 和 r=0.6358 用于 Romexis 和 ImageJ）。然而，自动测量的距离差异与手动方法之间存在负相关（分别为 r=-0.3484 和 r=-0.3494 用于 Romexis 和 ImageJ）。与参考值相比，自动测量和 ImageJ 测量球直径具有良好的近似性。
总之，与当前的手动方法相比，该自动计算器在牙科全景模式下的牙科 CBCT 成像系统的日常基础图像质量测试中提供了更快、更准确和可接受的方法。
在牙科全景模式的牙科 CBCT 成像系统的常规图像质量评估中，推荐使用自动计算器对模体图像进行图像失真分析，这可能涉及大量图像数据集的分析。它在时间和准确性方面提高了常规图像质量实践。
