{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T05:02:08Z","timestamp":1780549328411,"version":"3.54.1"},"reference-count":68,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,5,28]],"date-time":"2026-05-28T00:00:00Z","timestamp":1779926400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>Early and accurate brain tumor detection is vital for effective treatment. We propose a deep learning framework for MRI-based brain tumor classification, featuring a novel Custom CNN evaluated independently alongside six pre-trained models for comparative analysis (InceptionV3, EfficientNetV2L, ResNet152V2, Xception, VGG16, and MobileNetV2). Additionally, three separate ensemble models are constructed to analyze whether model combination improves performance. Experiments conducted on the Kaggle-Multiclass brain MRI dataset show that the proposed Custom CNN achieves the best performance, with an accuracy of 99.54%, and features a task-specific architecture (0.57M parameters) that achieves superior performance through domain-specific feature learning and computational efficiency, thus outperforming both individual pre-trained models and ensemble approaches. Among pre-trained models, EfficientNetV2L (99.47%) and InceptionV3 (99.39%) show competitive results, while the best ensemble model achieves 99.47% accuracy, indicating clinical deployment potential pending external validation. These results demonstrate that the proposed Custom CNN provides superior performance without requiring ensemble complexity, thus highlighting its effectiveness and efficiency for automated brain tumor classification.<\/jats:p>","DOI":"10.3390\/jimaging12060233","type":"journal-article","created":{"date-parts":[[2026,5,28]],"date-time":"2026-05-28T12:09:07Z","timestamp":1779970147000},"page":"233","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Brain Tumor Classification in MRI Images Using Combined Transfer Learning and Convolutional Neural Networks"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9308-5917","authenticated-orcid":false,"given":"Maisam","family":"Abbas","sequence":"first","affiliation":[{"name":"Department of Computer Science and Engineering, Yuan Ze University, Yuandong Rd., Zhongli District, Taoyuan 32003, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-7745-3221","authenticated-orcid":false,"given":"Muhammad","family":"Hassan","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Engineering, Yuan Ze University, Yuandong Rd., Zhongli District, Taoyuan 32003, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ran-Zan","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Engineering, Yuan Ze University, Yuandong Rd., Zhongli District, Taoyuan 32003, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2152-3359","authenticated-orcid":false,"given":"Chin-Hung","family":"Teng","sequence":"additional","affiliation":[{"name":"Department of Information Communication, Yuan Ze University, Yuandong Rd., Zhongli District, Taoyuan 32003, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Disci, R., Gurcan, F., and Soylu, A. 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