How does the direction of region of interest selection affect the fractal dimension?

IF 1.6 3区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Oral Radiology Pub Date : 2024-11-14 DOI:10.1007/s11282-024-00786-y

Adem Pekince, Kader Azlağ Pekince, Yasin Yasa

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引用次数: 0

Abstract

Objectives: Introduction Fractal analysis (FA) is a computational method used to quantify the complex trabecular structure of bone. While FA has been widely applied in dentistry, there are challenges in standardizing the technique due to factors such as image resolution, region of interest (ROI) selection, and image processing. This study aimed to investigate the impact of the direction of ROI selection (DROIS) on fractal dimension (FD) calculations.

Methods: Panoramic radiographs of 226 individuals aged 20-35 years were analyzed. ROIs were selected on the mandibular condyle, angular region, and mental region, and oriented at 0°, 22.5°, 45°, and 67.5° angles. FD was calculated using the box-counting method in ImageJ. The Friedman test and Wilcoxon signed-rank test were used for statistical analysis.

Results: The FD values differed significantly between the angled ROI groups in all three regions (Friedman test, p < 0.0001). Pairwise comparisons showed significant differences in FD between most ROI orientations, except between 22.5° and 67.5° in the angular region.

Conclusions: DROIS is an important factor that should be considered in FA studies to ensure reliable and reproducible FD values. Appropriate methodological choices can help account for the influence of DROIS on FD calculations..

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兴趣区域选择的方向如何影响分形维度？

目标：引言分形分析（FA）是一种用于量化复杂骨小梁结构的计算方法。虽然分形分析已被广泛应用于牙科领域，但由于图像分辨率、感兴趣区（ROI）选择和图像处理等因素，该技术的标准化仍面临挑战。本研究旨在探讨感兴趣区选择方向（DROIS）对分形维度（FD）计算的影响：分析了 226 名年龄在 20-35 岁之间的人的全景 X 光片。在下颌骨髁状突、内眦区和精神区选择 ROI，并将其定向为 0°、22.5°、45° 和 67.5°。使用 ImageJ 中的盒计数法计算 FD。统计分析采用 Friedman 检验和 Wilcoxon 符号秩检验：在所有三个区域中，成角 ROI 组之间的 FD 值差异显著（Friedman 检验，P < 0.0001）。配对比较显示，除了角度区域的22.5°和67.5°之间，大多数ROI方向之间的FD都存在显著差异：结论：DROIS是FA研究中应考虑的一个重要因素，以确保FD值的可靠性和可重复性。适当的方法选择有助于解释DROIS对FD计算的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Oral Radiology DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.20

自引率

13.60%

发文量

审稿时长

>12 weeks

期刊介绍： As the official English-language journal of the Japanese Society for Oral and Maxillofacial Radiology and the Asian Academy of Oral and Maxillofacial Radiology, Oral Radiology is intended to be a forum for international collaboration in head and neck diagnostic imaging and all related fields. Oral Radiology features cutting-edge research papers, review articles, case reports, and technical notes from both the clinical and experimental fields. As membership in the Society is not a prerequisite, contributions are welcome from researchers and clinicians worldwide.