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arXiv 2602.21613cs.CVcs.AI

颅内肿瘤MRI上的虚拟活检

Virtual Biopsy for Intracranial Tumors Diagnosis on MRI

School of Artificial Intelligence and Data Science University of Science and Technology of China(人工智能与数据科学学院 中国科学技术大学)

Xinzhe Luo, Shuai Shao, Yan Wang, Jiangtao Wang, Yutong Bai, Jianguo Zhang

AI总结:

本文提出虚拟活检框架,利用MRI和视觉-语言模型实现颅内肿瘤的非侵入性病理预测,准确率超过90%

摘要:

深部位于控制重要功能的 eloquent 大脑区域的颅内肿瘤呈现出关键的诊断挑战。临床实践已转向立体定向活检以在治疗前确认病理变化。然而,活检固有地具有出血和神经学缺陷的风险,并且由于肿瘤空间异质性而难以克服采样偏差,因为病理变化通常是区域性的而非全肿瘤性的。因此,推进基于MRI的非侵入性病理预测对于全面评估肿瘤和现代临床决策至关重要。主要挑战在于数据稀缺:低肿瘤发病率需要长的收集周期,而注释需要来自神经外科专家的活检验证病理。此外,微小病变体积缺乏分割掩膜导致关键特征被背景噪声淹没。为了解决这些挑战,我们构建了 ICT-MRI 数据集——第一个公开的活检验证基准,包含249个案例,涵盖四个类别。我们提出了一种虚拟活检框架,包括MRI处理器用于标准化;肿瘤定位器利用视觉-语言模型进行粗到细定位,通过弱监督实现;以及自适应诊断器,其采用掩码通道注意力机制融合局部判别特征与全局上下文。实验表明,准确率超过90%,优于基线模型超过20%。

英文摘要:

Deep intracranial tumors situated in eloquent brain regions controlling vital functions present critical diagnostic challenges. Clinical practice has shifted toward stereotactic biopsy for pathological confirmation before treatment. Yet biopsy carries inherent risks of hemorrhage and neurological deficits and struggles with sampling bias due to tumor spatial heterogeneity, because pathological changes are typically region-selective rather than tumor-wide. Therefore, advancing non-invasive MRI-based pathology prediction is essential for holistic tumor assessment and modern clinical decision-making. The primary challenge lies in data scarcity: low tumor incidence requires long collection cycles, and annotation demands biopsy-verified pathology from neurosurgical experts. Additionally, tiny lesion volumes lacking segmentation masks cause critical features to be overwhelmed by background noise. To address these challenges, we construct the ICT-MRI dataset - the first public biopsy-verified benchmark with 249 cases across four categories. We propose a Virtual Biopsy framework comprising: MRI-Processor for standardization; Tumor-Localizer employing vision-language models for coarse-to-fine localization via weak supervision; and Adaptive-Diagnoser with a Masked Channel Attention mechanism fusing local discriminative features with global contexts. Experiments demonstrate over 90% accuracy, outperforming baselines by more than 20%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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