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Advancing radiation safety, quality assurance, and scientific integrity in medical imaging: Highlights from the physics sessions of IRC 2025
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H. Mozdarani   , M. Bakhshandeh , H. Keivan , V. Changizi , O. Azadbakht , H. Zamani , R.K. Samani , E. Soleimani , S.M.J. Mortazavi |
| Department of Radiology Technology, School of Allied Medical Faculty, Shahid Beheshti University of Medical Sciences, Tehran, Iran , Mohsen Bakhshandeh |
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Abstract: (9 Views) |
The Physics Sessions of the 40th Iranian Congress of Radiology (IRC 2025) focused on improving patient safety, diagnostic accuracy, and evidence-based practice across ionizing and non-ionizing imaging modalities. The lectures emphasized that high-quality imaging requires effective radiation protection, rigorous quality assurance (QA), and well-trained professionals. A major theme of the congress was the development of a strong radiation safety culture based on justification, optimization (ALARA), and dose limitation. Speakers highlighted the importance of leadership, structured education, standardized safety protocols, and transparent communication in reducing unnecessary radiation exposure to patients and healthcare workers. Another key topic was quality control in diagnostic imaging. Properly implemented QA programs improve image quality while minimizing radiation dose. Monitoring parameters such as spatial and contrast resolution, image noise, artifacts, and contrast-to-noise ratio (CNR) is essential for maintaining diagnostic reliability and reducing repeat examinations. The congress also reviewed evolving evidence regarding patient lead shielding. Recent findings indicate that routine shielding may provide limited benefit in modern imaging systems and can occasionally interfere with automatic exposure control (AEC) or image quality. Current radiation protection strategies increasingly emphasize optimized imaging parameters, precise collimation, and avoidance of repeat imaging. Sessions on neonatal and obstetric ultrasound safety stressed the importance of monitoring Thermal Index (TI) and Mechanical Index (MI), minimizing scan duration, and improving operator awareness. Discussions on the Linear No-Threshold (LNT) model concluded that despite evidence of non-linear biological responses at low doses, the LNT model remains a practical and conservative framework for radiation protection policy. |
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| Keywords: Radiation safety culture, ALARA, ultrasound safety, linear no-threshold model, medical imaging optimization. |
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Full-Text [PDF 572 kb]
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Type of Study: News and Features |
Subject:
Radiation Biology
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