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Optimizing MRI sequence classification performance: insights from domain shift analysis.

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Title: Optimizing MRI sequence classification performance: insights from domain shift analysis.
Authors: Mahmutoglu, Mustafa Ahmed1 (AUTHOR), Rastogi, Aditya1,2,3 (AUTHOR), Brugnara, Gianluca1,2,3,4 (AUTHOR), Vollmuth, Philipp1,2,3,4 (AUTHOR), Foltyn-Dumitru, Martha1,2,3 (AUTHOR), Sahm, Felix5,6,7 (AUTHOR), Pfister, Stefan5,8,9,10 (AUTHOR), Sturm, Dominik5,9,10 (AUTHOR), Bendszus, Martin1 (AUTHOR), Schell, Marianne1 (AUTHOR) marianne.schell@med.uni-heidelberg.de
Source: European Radiology. Nov2025, Vol. 35 Issue 11, p6710-6718. 9p.
Subjects: Magnetic resonance imaging, Pediatric radiology, Transformer models, Deep learning, Classification algorithms, Convolutional neural networks, Transfer of training, Clinical medicine research
Abstract: Background: MRI sequence classification becomes challenging in multicenter studies due to variability in imaging protocols, leading to unreliable metadata and requiring labor-intensive manual annotation. While numerous automated MRI sequence identification models are available, they frequently encounter the issue of domain shift, which detrimentally impacts their accuracy. This study addresses domain shift, particularly from adult to pediatric MRI data, by evaluating the effectiveness of pre-trained models under these conditions. Methods: This retrospective and multicentric study explored the efficiency of a pre-trained convolutional (ResNet) and CNN-Transformer hybrid model (MedViT) to handle domain shift. The study involved training ResNet-18 and MedVit models on an adult MRI dataset and testing them on a pediatric dataset, with expert domain knowledge adjustments applied to account for differences in sequence types. Results: The MedViT model demonstrated superior performance compared to ResNet-18 and benchmark models, achieving an accuracy of 0.893 (95% CI 0.880–0.904). Expert domain knowledge adjustments further improved the MedViT model's accuracy to 0.905 (95% CI 0.893–0.916), showcasing its robustness in handling domain shift. Conclusion: Advanced neural network architectures like MedViT and expert domain knowledge on the target dataset significantly enhance the performance of MRI sequence classification models under domain shift conditions. By combining the strengths of CNNs and transformers, hybrid architectures offer enhanced robustness for reliable automated MRI sequence classification in diverse research and clinical settings. Key Points: QuestionDomain shift between adult and pediatric MRI data limits deep learning model accuracy, requiring solutions for reliable sequence classification across diverse patient populations. FindingsThe MedViT model outperformed ResNet-18 in pediatric imaging; expert domain knowledge adjustment further improved accuracy, demonstrating robustness across diverse datasets. Clinical relevanceThis study enhances MRI sequence classification by leveraging advanced neural networks and expert domain knowledge to mitigate domain shift, boosting diagnostic precision and efficiency across diverse patient populations in multicenter environments. [ABSTRACT FROM AUTHOR]
Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="AR" term="%22Mahmutoglu%2C+Mustafa+Ahmed%22">Mahmutoglu, Mustafa Ahmed</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rastogi%2C+Aditya%22">Rastogi, Aditya</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Brugnara%2C+Gianluca%22">Brugnara, Gianluca</searchLink><relatesTo>1,2,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vollmuth%2C+Philipp%22">Vollmuth, Philipp</searchLink><relatesTo>1,2,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Foltyn-Dumitru%2C+Martha%22">Foltyn-Dumitru, Martha</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sahm%2C+Felix%22">Sahm, Felix</searchLink><relatesTo>5,6,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pfister%2C+Stefan%22">Pfister, Stefan</searchLink><relatesTo>5,8,9,10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sturm%2C+Dominik%22">Sturm, Dominik</searchLink><relatesTo>5,9,10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bendszus%2C+Martin%22">Bendszus, Martin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schell%2C+Marianne%22">Schell, Marianne</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> marianne.schell@med.uni-heidelberg.de</i>
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  Data: Background: MRI sequence classification becomes challenging in multicenter studies due to variability in imaging protocols, leading to unreliable metadata and requiring labor-intensive manual annotation. While numerous automated MRI sequence identification models are available, they frequently encounter the issue of domain shift, which detrimentally impacts their accuracy. This study addresses domain shift, particularly from adult to pediatric MRI data, by evaluating the effectiveness of pre-trained models under these conditions. Methods: This retrospective and multicentric study explored the efficiency of a pre-trained convolutional (ResNet) and CNN-Transformer hybrid model (MedViT) to handle domain shift. The study involved training ResNet-18 and MedVit models on an adult MRI dataset and testing them on a pediatric dataset, with expert domain knowledge adjustments applied to account for differences in sequence types. Results: The MedViT model demonstrated superior performance compared to ResNet-18 and benchmark models, achieving an accuracy of 0.893 (95% CI 0.880–0.904). Expert domain knowledge adjustments further improved the MedViT model's accuracy to 0.905 (95% CI 0.893–0.916), showcasing its robustness in handling domain shift. Conclusion: Advanced neural network architectures like MedViT and expert domain knowledge on the target dataset significantly enhance the performance of MRI sequence classification models under domain shift conditions. By combining the strengths of CNNs and transformers, hybrid architectures offer enhanced robustness for reliable automated MRI sequence classification in diverse research and clinical settings. Key Points: QuestionDomain shift between adult and pediatric MRI data limits deep learning model accuracy, requiring solutions for reliable sequence classification across diverse patient populations. FindingsThe MedViT model outperformed ResNet-18 in pediatric imaging; expert domain knowledge adjustment further improved accuracy, demonstrating robustness across diverse datasets. Clinical relevanceThis study enhances MRI sequence classification by leveraging advanced neural networks and expert domain knowledge to mitigate domain shift, boosting diagnostic precision and efficiency across diverse patient populations in multicenter environments. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s00330-025-11671-5
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