Deep learning-based patient re-identification is able to exploit the biometric nature of medical chest X-ray data

Packhäuser K, Gündel S, Münster N, Syben C, Christlein V, Maier A (2022)


Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2022

Journal

Book Volume: 12

Article Number: 14851

DOI: 10.1038/s41598-022-19045-3

Abstract

With the rise and ever-increasing potential of deep learning techniques in recent years, publicly available medical datasets became a key factor to enable reproducible development of diagnostic algorithms in the medical domain. Medical data contains sensitive patient-related information and is therefore usually anonymized by removing patient identifiers, e.g., patient names before publication. To the best of our knowledge, we are the first to show that a well-trained deep learning system is able to recover the patient identity from chest X-ray data. We demonstrate this using the publicly available large-scale ChestX-ray14 dataset, a collection of 112,120 frontal-view chest X-ray images from 30,805 unique patients. Our verification system is able to identify whether two frontal chest X-ray images are from the same person with an AUC of 0.9940 and a classification accuracy of 95.55%. We further highlight that the proposed system is able to reveal the same person even ten and more years after the initial scan. When pursuing a retrieval approach, we observe an mAP@R of 0.9748 and a precision@1 of 0.9963. Furthermore, we achieve an AUC of up to 0.9870 and a precision@1 of up to 0.9444 when evaluating our trained networks on external datasets such as CheXpert and the COVID-19 Image Data Collection. Based on this high identification rate, a potential attacker may leak patient-related information and additionally cross-reference images to obtain more information. Thus, there is a great risk of sensitive content falling into unauthorized hands or being disseminated against the will of the concerned patients. Especially during the COVID-19 pandemic, numerous chest X-ray datasets have been published to advance research. Therefore, such data may be vulnerable to potential attacks by deep learning-based re-identification algorithms.

Authors with CRIS profile

How to cite

APA:

Packhäuser, K., Gündel, S., Münster, N., Syben, C., Christlein, V., & Maier, A. (2022). Deep learning-based patient re-identification is able to exploit the biometric nature of medical chest X-ray data. Scientific Reports, 12. https://dx.doi.org/10.1038/s41598-022-19045-3

MLA:

Packhäuser, Kai, et al. "Deep learning-based patient re-identification is able to exploit the biometric nature of medical chest X-ray data." Scientific Reports 12 (2022).

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