用于对孕妇进行成像的低剂量计算机断层扫描肺血管造影方案：能否在不降低图像质量的情况下实现剂量降低？
Low dose computed tomography pulmonary angiography protocol for imaging pregnant patients: Can dose reduction be achieved without reducing image quality?
作者信息
Halpenny Darragh, Park Brian, Alpert Jeffrey, Latson Larry, Kim Nancy, Babb James, Shiau Maria, Ko Jane
机构信息
Department of Thoracic Radiology, New York University School of Medicine, 660 1st Ave, NY 10016, USA.
New York University School of Medicine, 550 1st Avenue, New York, NY 10016, USA.
出版信息
Clin Imaging. 2017 Jul-Aug;44:101-105. doi: 10.1016/j.clinimag.2017.03.020. Epub 2017 Apr 7.
OBJECTIVE
To assess the effect of low dose computed tomography pulmonary angiography (CTPA) on radiation dose in pregnant patients.
MATERIALS AND METHODS
An old CTPA protocol for pregnant patients was compared to a new protocol. Protocol changes included: decreased kVp; increased contrast injection rate; imaging after shallow inspiration. Patients undergoing CTPA before (phase 1 group) or after (phase 2 group) the protocol change, were assessed.
RESULTS
Effective dose was lower in the phase 2 group (0.95 v 1.66 mSv; p<0.001). Quantitative noise was lower in the phase 1 group (p<0.001).
CONCLUSION
Low dose CTPA tailored for pregnancy reduces dose in pregnant patients.
目的
评估低剂量计算机断层扫描肺动脉造影（CTPA）对孕妇辐射剂量的影响。
材料与方法
将旧的孕妇CTPA方案与新方案进行比较。方案变化包括：降低千伏峰值（kVp）；提高造影剂注射速率；浅吸气后成像。对在方案改变之前（第1阶段组）或之后（第2阶段组）接受CTPA检查的患者进行评估。
结果
第2阶段组的有效剂量较低（0.95对1.66毫希沃特；p<0.001）。第1阶段组的定量噪声较低（p<0.001）。
结论
针对孕妇量身定制的低剂量CTPA可降低孕妇的剂量。
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