Improving machine learning-based bitewing segmentation with synthetic data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00064165%3A_____%2F25%3A10497991" target="_blank" >RIV/00064165:_____/25:10497991 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11110/25:10497991

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IV8jIDQdVO" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IV8jIDQdVO</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jdent.2025.105679" target="_blank" >10.1016/j.jdent.2025.105679</a>

Result language

angličtina

Original language name

Improving machine learning-based bitewing segmentation with synthetic data

Original language description

Objectives: Class imbalance in datasets is one of the challenges of machine learning (ML) in medical image analysis. We employed synthetic data to overcome class imbalance when segmenting bitewing radiographs as an exemplary task for using ML. Methods: After segmenting bitewings into classes, i.e. dental structures, restorations, and background, the pixellevel representation of implants in the training set (1543 bitewings) and testing set (177 bitewings) was 0.03 % and 0.07 %, respectively. A diffusion model and a generative adversarial network (pix2pix) were used to generate a dataset synthetically enriched in implants. A U-Net segmentation model was trained on (1) the original dataset, (2) the synthetic dataset, (3) on the synthetic dataset and fine-tuned on the original dataset, or (4) on a dataset which was na &amp; iuml;vely oversampled with images containing implants. Results: U-Net trained on the original dataset was unable to segment implants in the testing set. Model performance was significantly improved by na &amp; iuml;ve over-sampling, achieving the highest precision. The model trained only on synthetic data performed worse than na &amp; iuml;ve over-sampling in all metrics, but with fine-tuning on original data, it resulted in the highest Dice score, recall, F1 score and ROC AUC, respectively. The performance on other classes than implants was similar for all strategies except training only on synthetic data, which tended to perform worse. Conclusions: The use of synthetic data alone may deteriorate the performance of segmentation models. However, fine-tuning on original data could significantly enhance model performance, especially for heavily underrepresented classes. Clinical significance: This study explored the use of synthetic data to enhance segmentation of bitewing radiographs, focusing on underrepresented classes like implants. Pre-training on synthetic data followed by finetuning on original data yielded the best results, highlighting the potential of synthetic data to advance AIdriven dental imaging and ultimately support clinical decision-making.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30208 - Dentistry, oral surgery and medicine

Project

—

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Dentistry

ISSN

0300-5712

e-ISSN

1879-176X

Volume of the periodical

156

Issue of the periodical within the volume

May

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

105679

UT code for WoS article

001447050400001

EID of the result in the Scopus database

2-s2.0-86000488979