大型多中心世界杯下注网站首次量化怀孕期间电离辐射暴露.

SEATTLE, July 24, 2019-在美国和安大略省，在怀孕期间使用计算机断层扫描(CT)使母亲和胎儿暴露在电离辐射下的情况在过去21年中显著增加, Canada.

According to a large, 妊娠期先进医学影像的多中心世界杯下注网站, published today in JAMA Network Open, CT scans were performed in about 0.8 percent of pregnancies in the United States and 0.4 percent in Ontario in 2016. 在21年的世界杯下注网站中，美国的使用率增加了近四倍，安大略省的使用率增加了一倍, according to “1996-2016年美国和加拿大安大略省妊娠期医学成像趋势.”

“大多数孕妇都接受常规超声检查来监测胎儿的生长情况, which delivers no ionizing radiation,” said co-lead author Diana L. Miglioretti, PhD, 加州大学生物统计学教授, Davis, Department of Public Health Sciences, 凯泽永久华盛顿健康世界杯下注网站所(KPWHRI)高级世界杯下注网站员. 但有时医生可能希望使用先进的成像技术来检测或排除孕妇的严重疾病, most often pulmonary embolism, brain trauma or aneurysm, or appendicitis.”
 
美国国家癌症世界杯下注网站所(NCI)辐射致癌世界杯下注网站的世界杯下注网站人员回顾了来自美国和安大略省六个综合卫生保健系统的数据, Canada. The study included 2.2 million women who had 3.5 million live births between 1996 and 2016. 世界杯下注网站人员追踪了怀孕期间先进医学成像的综合使用情况, including CT scans, radiography, angiography/fluoroscopy, and nuclear medicine, 其中包括电离辐射和磁共振成像, or MRI, which does not. Ultrasound was not included in the study.

美国怀孕期间的CT扫描率从2007年开始趋于平稳，自2010年以来一直呈下降趋势, the study found. Meanwhile, overall rates continued to increase in Ontario, Canada, 但在世界杯下注网站期间，这一比例比美国低33%.

Minimize exposure to ionizing radiation

“这项世界杯下注网站让我们有机会更仔细地世界杯下注网站孕期先进成像技术的应用,” said Marilyn L. Kwan, PhD他是北加州凯撒永久医疗机构的联合主要作者和高级世界杯下注网站科学家 Division of Research. “量化电离辐射暴露是很重要的，因为它会导致癌症和出生缺陷，应该保持在最低限度, especially during pregnancy.”

“Always, but especially if you’re pregnant, 你应该询问是否真的有必要进行任何涉及电离辐射的影像学检查,” said senior author Rebecca Smith-Bindman, MD他是加州大学旧金山分校(UCSF)医学院放射学教授. “If advanced imaging is needed, 询问你的医生是否可以再做一次不涉及电离辐射的影像学检查, such as MRI or ultrasound.”

In general, CT scans are quicker, easier, 比核磁共振和其他先进的成像技术更容易获得, but they entail a large dose of ionizing radiation, many times higher than a chest X-ray.

辐射诱发癌症世界杯下注网站的世界杯下注网站人员目前正在检查患者在医学成像期间暴露的辐射剂量，并确定成像与儿童癌症风险之间可能存在的联系.

NCI (R01CA185687和R50CA211115)支持本世界杯下注网站. 安大略省卫生部也支持加拿大安大略省部分.

In addition to Drs. Kwan, Miglioretti, and Smith-Bindman, co-authors were Erin J. Aiello Bowles, MPH, KPWHRI; Sheila Weinmann, PhD, 2022世界杯下注网站 Center for Health Research; Kamala A. Deosaransingh, MPH, Lisa M. Moy, MPH, and Lawrence H. Kushi, ScD, 2022世界杯下注网站 Northern California Division of Research; Emily C. Marlow, MPH, UC Davis; Prachi Chavan, MPH, UC San Francisco; Stephanie Y. Cheng, MSc, and Jason D. Pole, PhD, Institute for Clinical Evaluative Sciences (ICES), in Toronto; Wesley Bolch, PhD, University of Florida, Gainesville; James R. Duncan, MD, PhD, Washington University in St. Louis; Robert T. Greenlee, PhD, Marshfield Clinic Health System; Alanna K. Rahm, PhD, Genomic Medicine Institute; and Natasha K. Stout, PhD, Harvard Medical School.

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2022世界杯下注网站致力于帮助塑造医疗保健的未来. 我们被公认为美国领先的医疗保健提供者和非营利健康计划之一. Founded in 1945, 2022世界杯下注网站的使命是提供高品质的服务, 负担得起的医疗保健服务，并改善我们的成员和我们所服务的社区的健康. We currently serve more than 12.在8个州和哥伦比亚特区有400万会员. 对会员和患者的护理重点是他们的整体健康，并由他们的个人永久医疗集团医生指导, specialists and team of caregivers. 我们的专家和关怀的医疗团队被授权和支持行业领先的技术进步和健康促进工具, disease prevention, 最先进的医疗服务和世界一流的慢性病管理. 2022世界杯下注网站 is dedicated to care innovations, clinical research, health education and the support of community health. For more information, go to: kp.org/share.