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A novel model of artificial intelligence based automated image analysis of CT urography to identify bladder cancer in patients investigated for macroscopic hematuria
Univ Gothenburg, Sweden; NU Hosp Grp, Sweden.
Sahlgrens Univ Hosp, Sweden; Univ Gothenburg, Sweden.
Chalmers Univ Technol, Sweden; Eigenvision AB, Sweden.
Linköping University, Department of Biomedical and Clinical Sciences, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Urology in Östergötland.
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2024 (English)In: Scandinavian journal of urology, ISSN 2168-1805, E-ISSN 2168-1813, Vol. 59, p. 90-97Article in journal (Refereed) Published
Abstract [en]

Objective: To evaluate whether artificial intelligence (AI) based automatic image analysis utilising convolutional neural networks (CNNs) can be used to evaluate computed tomography urography (CTU) for the presence of urinary bladder cancer (UBC) in patients with macroscopic hematuria. Methods: Our study included patients who had undergone evaluation for macroscopic hematuria. A CNN-based AI model was trained and validated on the CTUs included in the study on a dedicated research platform (Recomia.org). Sensitivity and specificity were calculated to assess the performance of the AI model. Cystoscopy findings were used as the reference method. Results: The training cohort comprised a total of 530 patients. Following the optimisation process, we developed the last version of our AI model. Subsequently, we utilised the model in the validation cohort which included an additional 400 patients (including 239 patients with UBC). The AI model had a sensitivity of 0.83 (95% confidence intervals [CI], 0.76-0.89), specificity of 0.76 (95% CI 0.67-0.84), and a negative predictive value (NPV) of 0.97 (95% CI 0.95-0.98). The majority of tumours in the false negative group (n = 24) were solitary (67%) and smaller than 1 cm (50%), with the majority of patients having cTaG1-2 (71%). Conclusions: We developed and tested an AI model for automatic image analysis of CTUs to detect UBC in patients with macroscopic hematuria. This model showed promising results with a high detection rate and excessive NPV. Further developments could lead to a decreased need for invasive investigations and prioritising patients with serious tumours.

Place, publisher, year, edition, pages
Medical Journal Sweden AB , 2024. Vol. 59, p. 90-97
Keywords [en]
Artificial intelligence; bladder cancer; computed tomography; convolutional neural networks; deep learning; hematuria
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:liu:diva-204375DOI: 10.2340/sju.v59.39930ISI: 001236667100001PubMedID: 38698545OAI: oai:DiVA.org:liu-204375DiVA, id: diva2:1868933
Note

Funding Agencies|Swedish state [ALFGBG-873181]; Department of Research; Development, NU-Hospital Group

Available from: 2024-06-12 Created: 2024-06-12 Last updated: 2024-06-12

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Jahnson, Staffan
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Division of Surgery, Orthopedics and OncologyFaculty of Medicine and Health SciencesDepartment of Urology in Östergötland
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