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Objectives <p>To select and discover features which are highly correlated with condylar resorption (CR) after orthognathic surgery (OS) by a new method.</p> Materials and methods <p>The cone beam computed tomography (CBCT) images were collected from orthognathic patients taken at <Emphasis Type="BoldItalic">T1(baseline time point)</Emphasis> and <Emphasis Type="BoldItalic">T2(within 3–36&#xa0;months postoperatively)</Emphasis>. The subjects were divided into the CR group and the control group by using a 2-level scale after registering <Emphasis Type="BoldItalic">T1</Emphasis> and <Emphasis Type="BoldItalic">T2</Emphasis> images. The condyles were segmented by MVEL-Net network model and were analyzed by Pyradiomics. The D-value equaled to the absolute difference-value (D-value) between the feature values of <Emphasis Type="BoldItalic">T1</Emphasis> and <Emphasis Type="BoldItalic">T2</Emphasis>. The correlation between features with statistically significant differences in <Emphasis Type="BoldItalic">T1</Emphasis> and D-values would be analyzed to find the specific features related to CR after OS.</p> Results <p>A total of 145 subjects were included (27 males and 118 females), which had 44 subjects in the CR group, 101 subjects in the control group. For all samples, a total of 82 features were extracted (F<sub><i>1</i></sub>), which were with statistical differences at <Emphasis Type="BoldItalic">T1</Emphasis> time point between CR and control groups. By using the D-value, the number of features was reduced to 32 features (F<sub><i>d</i></sub>). Among F<sub><i>d</i></sub>, only 3 were not included in F<sub><i>1</i></sub>.</p> Conclusions <p>The D-value was proposed for selecting specific features of CR after OS and it can be observed that the D-value serves the purpose of feature specification compared to <Emphasis Type="BoldItalic">T1</Emphasis> values. By using the D-values, several features were found to change significantly during the process of CR after OS.</p> <p>Clinical relevance.</p> <p>The features selected by D-value can be used for the establishment of a prediction model for CR after OS.</p>

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CBCT image based radiomic analysis for condylar resorption after orthognathic surgery

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Ruo-han Ma,
  • Ji-ling Feng,
  • Jia-yang Chen,
  • Yu-xuan Yang,
  • Ju-peng Li,
  • Gang Li

摘要

Objectives

To select and discover features which are highly correlated with condylar resorption (CR) after orthognathic surgery (OS) by a new method.

Materials and methods

The cone beam computed tomography (CBCT) images were collected from orthognathic patients taken at T1(baseline time point) and T2(within 3–36 months postoperatively). The subjects were divided into the CR group and the control group by using a 2-level scale after registering T1 and T2 images. The condyles were segmented by MVEL-Net network model and were analyzed by Pyradiomics. The D-value equaled to the absolute difference-value (D-value) between the feature values of T1 and T2. The correlation between features with statistically significant differences in T1 and D-values would be analyzed to find the specific features related to CR after OS.

Results

A total of 145 subjects were included (27 males and 118 females), which had 44 subjects in the CR group, 101 subjects in the control group. For all samples, a total of 82 features were extracted (F1), which were with statistical differences at T1 time point between CR and control groups. By using the D-value, the number of features was reduced to 32 features (Fd). Among Fd, only 3 were not included in F1.

Conclusions

The D-value was proposed for selecting specific features of CR after OS and it can be observed that the D-value serves the purpose of feature specification compared to T1 values. By using the D-values, several features were found to change significantly during the process of CR after OS.

Clinical relevance.

The features selected by D-value can be used for the establishment of a prediction model for CR after OS.