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Yao J, Ertl-Wagner BB, Dana J, Hanneman K, Kashif Al-Ghita M, Liu L, McInnes MDF, Nicolaou S, Reinhold C, Patlas MN. Canadian radiology: 2024 update. Diagn Interv Imaging 2024:S2211-5684(24)00140-2. [PMID: 38942638 DOI: 10.1016/j.diii.2024.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Accepted: 06/11/2024] [Indexed: 06/30/2024]
Abstract
Radiology in Canada is advancing through innovations in clinical practices and research methodologies. Recent developments focus on refining evidence-based practice guidelines, exploring innovative imaging techniques and enhancing diagnostic processes through artificial intelligence. Within the global radiology community, Canadian institutions play an important role by engaging in international collaborations, such as with the American College of Radiology to refine implementation of the Ovarian-Adnexal Reporting and Data System for ultrasound and magnetic resonance imaging. Additionally, researchers have participated in multidisciplinary collaborations to evaluate the performance of artificial intelligence-driven diagnostic tools for chronic liver disease and pediatric brain tumors. Beyond clinical radiology, efforts extend to addressing gender disparities in the field, improving educational practices, and enhancing the environmental sustainability of radiology departments. These advancements highlight Canada's role in the global radiology community, showcasing a commitment to improving patient outcomes and advancing the field through research and innovation. This update underscores the importance of continued collaboration and innovation to address emerging challenges and further enhance the quality and efficacy of radiology practices worldwide.
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Affiliation(s)
- Jason Yao
- Department of Radiology, McMaster University, Hamilton, ON L8S4K1, Canada.
| | - Birgit B Ertl-Wagner
- Department of Diagnostic Imaging, Division of Neuroradiology, the Hospital for Sick Children, Toronto, ON M5G1X8, Canada; Department of Medical Imaging, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S1A8, Canada
| | - Jérémy Dana
- Department of Radiology, McGill University Health Centre, McGill University, Montreal, QC H3G1A4, Canada
| | - Kate Hanneman
- Department of Medical Imaging, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S1A8, Canada; University Medical Imaging Toronto, Joint Department of Medical Imaging, University Health Network (UHN), Toronto, ON M5G1X6, Canada
| | | | - Lulu Liu
- Department of Radiology, Vancouver General Hospital, University of British Columbia, Vancouver, BC V5Z1M9, Canada
| | - Matthew D F McInnes
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H8M5, Canada; Departments of Radiology and Epidemiology, University of Ottawa, Ottawa, ON K1H8L6, Canada; The Ottawa Hospital Research Institute, Clinical Epidemiology Program, Ottawa, ON K1H8L6, Canada
| | - Savvas Nicolaou
- Department of Radiology, Vancouver General Hospital, University of British Columbia, Vancouver, BC V5Z1M9, Canada
| | - Caroline Reinhold
- Department of Radiology, McGill University Health Centre, McGill University, Montreal, QC H3G1A4, Canada
| | - Michael N Patlas
- Department of Medical Imaging, Temerty Faculty of Medicine, University of Toronto, Toronto, ON M5S1A8, Canada; University Medical Imaging Toronto, Joint Department of Medical Imaging, University Health Network (UHN), Toronto, ON M5G1X6, Canada
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Xu JJ, Ulriksen PS, Jawad S, Rohde YZ, Sejer M, Achiam MP, Resch TA, Lönn L, Hansen KL. Iodine density mapping for the diagnosis of acute bowel ischemia using fast kV-switching dual-energy CT. Abdom Radiol (NY) 2024; 49:312-319. [PMID: 37978076 PMCID: PMC10789852 DOI: 10.1007/s00261-023-04097-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 10/11/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023]
Abstract
PURPOSE To evaluate the diagnostic capabilities of a supplementary color ramped iodine density map compared to virtual monoenergetic images (VMIs) at 74 keV in the diagnosis of acute bowel ischemia (ABI). METHODS Data for this study were prospectively gathered and retrospectively evaluated. Patients referred to the Department of Diagnostic Radiology between October 2020 and August 2022 on the suspicion of ABI and underwent surgery < 12 h following fast kV-switching venous phase abdominal dual-energy CT (DECT) were consecutively included. Images were evaluated by two board-certified radiologists and two radiology residents. First round included only 74 keV VMIs resembling conventional 120 kVp images, and the second round included a supplementary iodine density map. Readers were asked to register presence of ABI as well as their confidence in their diagnosis based on a 5-point Likert scale. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated for each observer with the surgical findings as the gold-standard. McNemar's and Wilcoxon signed-rank test were used to compare registrations and diagnostic confidence across assessment rounds. RESULTS A total of 29 patients resulting in 31 DECT scans were included. Fourteen cases of ischemic/necrotic bowel were reported following surgery. Sensitivity and NPV were decreased with the use of supplementary iodine map images compared to 120 kVp-like images without supplementary iodine map images for three of four observers (round 1 range: 71.4-92.9% and 78.0-94.8%; round 2 range: 57.1-78.6% and 70.1-83.3%, respectively), while specificity and PPV were increased for three of four observers (round 1 range: 64.7-94.1% and 67.4-93.1%; round 2 range: 88.2-94.1% and 73.8-91.1%, respectively). However, no significant difference in ABI diagnosis or diagnostic confidence was found (p-value range: 0.07-1.00 and 0.23-0.58, respectively). CONCLUSION No significant difference for the diagnosis of ABI was found using supplementary iodine mapping. Our study may suggest a trend of increased specificity and decreased sensitivity, hence, the use of supplementary iodine mapping should be carefully considered.
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Affiliation(s)
- Jack Junchi Xu
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark.
- Department of Clinical Medicine, University of Copenhagen, 2100, Copenhagen, Denmark.
| | - Peter Sommer Ulriksen
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Samir Jawad
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Yecatarina Zincuk Rohde
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Morten Sejer
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Michael Patrick Achiam
- Department of Clinical Medicine, University of Copenhagen, 2100, Copenhagen, Denmark
- Department of Surgery and Transplantation, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Timothy Andrew Resch
- Department of Clinical Medicine, University of Copenhagen, 2100, Copenhagen, Denmark
- Department of Vascular Surgery, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Lars Lönn
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Kristoffer Lindskov Hansen
- Department of Diagnostic Radiology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, 2100, Copenhagen, Denmark
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Yu HS, Keraliya A, Chakravarti S, Uyeda JW. Multienergy Computed Tomography Applications. Radiol Clin North Am 2023; 61:23-35. [DOI: 10.1016/j.rcl.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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