Computed tomography colonography and radiation risk:How low can we go?

• 作者: Jelena Popic Sandra Tipuric Ivan Balen Anna Mrzljak
• 来源期刊: 世界胃肠内镜杂志:英文版(电子版)
• 学科: 医学
• 关键词: Computed tomography colonography Colorectal cancer Radiation risk Image quality Image noise Iterative reconstruction
• 年，卷（期）: 2021,（3）
• 页码范围: 72-81
• 页数: 10页
• 分类号: R73

摘要

Computed tomography colonography(CTC)has become a key examination in detecting colonic polyps and colorectal carcinoma(CRC).It is particularly useful after incomplete optical colonoscopy(OC)for patients with sedation risks and patients anxious about the risks or potential discomfort associated with OC.CTC's main advantages compared with OC are its non-invasive nature,better patient compliance,and the ability to assess the extracolonic disease.Despite these advantages,ionizing radiation remains the most significant burden of CTC.This opinion review comprehensively addresses the radiation risk of CTC,incorporating imaging technology refinements such as automatic tube current modulation,filtered back projections,lowering the tube voltage,and iterative reconstructions as tools for optimizing low and ultra-low dose protocols of CTC.Future perspectives arise from integrating artificial intelligence in computed tomography machines for the screening of CRC.