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标题: "ConfTriage: A Calibration-Aware LLM Triage Framework for Pulmonary Nodule Malignancy with Selective Specialist Deferral"
原文链接: "https://arxiv.org/abs/2608.10885"
发布日期: "2026-08-11"
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---

## Computer Science > Computer Vision and Pattern Recognition

## Title:ConfTriage: A Calibration-Aware LLM Triage Framework for Pulmonary Nodule Malignancy with Selective Specialist Deferral

[View PDF](https://arxiv.org/pdf/2608.10885) [HTML (experimental)](https://arxiv.org/html/2608.10885v1)

> Abstract:Pulmonary nodule malignancy prediction typically depends on image-trained specialist deep learning (DL) models that require substantial annotated imaging data and task-specific training. We investigate whether a generalist large language model (LLM), reading only a faithful natural-language rendering of standard nodule attributes, can serve as a calibrated triage layer. We propose ConfTriage, a confidence-calibrated method built on three pillars: language as the modality, calibration as the safety mechanism, and a selective specialist DL backstop for low-confidence cases. We prove two guarantees: a finite-sample combined-error bound yielding an explicit per-threshold operational certificate, and an oracle inequality showing that excess risk over the Bayes-optimal deferral classifier is controlled by the L1 calibration error of the LLM probability. A controlled seven-way input ablation across five frontier LLMs on LIDC-IDRI shows that natural-language descriptions dominate the diagnostic signal, while low-level image statistics are essentially diagnostically vacuous. ConfTriage achieved an F1 score of 88.22% and an AUC of 0.92, resolving 76.5% of cases using zero-shot LLM inference alone and referring only uncertain cases to the specialist DL backstop. These results demonstrate that clinically meaningful diagnostic information can be captured through structured radiological descriptions and leveraged by calibrated LLMs for selective referral. The framework suggests a practical pathway for combining generalist LLM prediction with specialist AI models in medical decision-support systems. Source code is publicly available at [this https URL](https://github.com/rabiul-ai/ConfTriage).

| Comments: |  |
| --- | --- |
| Subjects: | Computer Vision and Pattern Recognition (cs.CV) |
| Cite as: | [arXiv:2608.10885](https://arxiv.org/abs/2608.10885) \[cs.CV\] |
|  | (or [arXiv:2608.10885v1](https://arxiv.org/abs/2608.10885v1) \[cs.CV\] for this version) |
|  | [https://doi.org/10.48550/arXiv.2608.10885](https://doi.org/10.48550/arXiv.2608.10885) |

## Submission history

From: Md Rabiul Islam \[[view email](https://arxiv.org/show-email/f19e7c1c/2608.10885)\]  
**\[v1\]** Tue, 11 Aug 2026 13:02:41 UTC (6,647 KB)

[Which authors of this paper are endorsers?](https://arxiv.org/auth/show-endorsers/2608.10885) | Disable MathJax ([What is MathJax?](https://info.arxiv.org/help/mathjax.html))
