Deep Learning for MR Angiography: Automated Detection of Cerebral Aneurysms
| Autor: | Akira Yamamoto, Taro Shimono, Yukio Miki, Shinya Fukumoto, Daiju Ueda, Antoine Choppin, Satoshi Doishita, Akitoshi Shimazaki, Yutaka Katayama, Masataka Nishimori, Yuki Shimahara |
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| Rok vydání: | 2018 |
| Předmět: |
Male
Standard deviation 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Aneurysm Text mining Deep Learning Female patient Image Interpretation Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Aged Retrospective Studies Training set business.industry Mr angiography Brain Retrospective cohort study Intracranial Aneurysm Middle Aged medicine.disease 030220 oncology & carcinogenesis Female Nuclear medicine business Algorithms Magnetic Resonance Angiography Test data |
| Zdroj: | Radiology. 290(1) |
| ISSN: | 1527-1315 |
| Popis: | Purpose To develop and evaluate a supportive algorithm using deep learning for detecting cerebral aneurysms at time-of-flight MR angiography to provide a second assessment of images already interpreted by radiologists. Materials and Methods MR images reported by radiologists to contain aneurysms were extracted from four institutions for the period from November 2006 through October 2017. The images were divided into three data sets: training data set, internal test data set, and external test data set. The algorithm was constructed by deep learning with the training data set, and its sensitivity to detect aneurysms in the test data sets was evaluated. To find aneurysms that had been overlooked in the initial reports, two radiologists independently performed a blinded interpretation of aneurysm candidates detected by the algorithm. When there was disagreement, the final diagnosis was made in consensus. The number of newly detected aneurysms was also evaluated. Results The training data set, which provided training and validation data, included 748 aneurysms (mean size, 3.1 mm ± 2.0 [standard deviation]) from 683 examinations; 318 of these examinations were on male patients (mean age, 63 years ± 13) and 365 were on female patients (mean age, 64 years ± 13). Test data were provided by the internal test data set (649 aneurysms [mean size, 4.1 mm ± 3.2] in 521 examinations, including 177 male patients and 344 female patients with mean age of 66 years ± 12 and 67 years ± 13, respectively) and the external test data set (80 aneurysms [mean size, 4.1 mm ± 2.1] in 67 examinations, including 19 male patients and 48 female patients with mean age of 63 years ± 12 and 68 years ± 12, respectively). The sensitivity was 91% (592 of 649) and 93% (74 of 80) for the internal and external test data sets, respectively. The algorithm improved aneurysm detection in the internal and external test data sets by 4.8% (31 of 649) and 13% (10 of 80), respectively, compared with the initial reports. Conclusion A deep learning algorithm detected cerebral aneurysms in radiologic reports with high sensitivity and improved aneurysm detection compared with the initial reports. © RSNA, 2018 See also the editorial by Flanders in this issue. |
| Databáze: | OpenAIRE |
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