Automatic Segmentation of Cervical Precancerous Lesions in Colposcopy Image Using Pyramid Scene Parsing Network and Transfer Learning
Bibliographic record
Abstract
Cervical cancer is the second most common cancer among women worldwide.According to the 2020 estimates by GLOBOCAN in 185 countries, there were 604,000 new cases of cervical cancer and 342,000 deaths.In clinical practice, the segmentation of LSIL+ (cervical intraepithelial neoplasia+cervical cancer) lesions in colposcopic images (cervical imaging) is essential for assisting gynecologists in diagnosing cervical intraepithelial neoplasia grading and cervical cancer.It can also aid gynecologists in identifying the precise lesion area for further pathological examination.Existing computer-aided diagnosis algorithms exhibit poor segmentation performance due to insufficient training data that fail to focus on semantically meaningful lesion parts.In this study, we employed the improved Pyramid Scene Parsing Network (PSPNet-ResNet50) computer-aided diagnosis algorithm to automatically segment LSIL+ lesion areas in colposcopic images.We collected 971 images containing low-grade cervical intraepithelial neoplasia LSIL (CIN 1), high-grade cervical intraepithelial neoplasia HSIL (CIN 2/CIN 3), and cervical cancer from the Department of Obstetrics and Gynecology at Hebei University Affiliated Hospital.Two experienced gynecologists annotated the LSIL+ lesion areas to create a dataset for cervical lesion segmentation.We designed a lesion-aware convolution neural network transfer learning strategy to accomplish the lesion segmentation task.Comprehensive experiments were conducted to evaluate the proposed method's segmentation performance on clinical cervical images.Our research findings indicate that the PSPNet-ResNet50 network used in this study achieved the best segmentation results for automated (LSIL+ area) segmentation, with pixel accuracy (PA), mean pixel accuracy (MPA), precision (Pre), recall (Re), F1 score (F1), and mean intersection over union (MIoU) values of 95.21%, 89.83%, 84.58%, 82.22%, 83.38%, and 83.83%, respectively.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".