Dose reduction in multislice computed tomography
Dose reduction in multislice computed tomography
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DOI：
10.1097/01.rct.0000151188.72850.0d
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发表时间：
2005-01-01
影响因子：
1.3
通讯作者：
Reiser, M
中科院分区：
文献类型：
--
作者：
Hundt, W;Rust, F;Reiser, M
目的：评估的衰减为基础的在线调制管电流的多层计算机断层扫描（CT），以探讨这种剂量节约technology.Methods的潜力：55例患者进行了扫描，后续CT检查，没有和与照顾剂量（西门子医疗解决方案，埃尔兰根，德国）。评价了应用剂量、图像噪声和主观图像质量。通过获得每次重建扫描的有效毫安/秒和整个扫描的绝对剂量要求来确定患者暴露的减少。结果：通过应用基于衰减的管电流在线调制实现的剂量减少为29.4% +/-3.1%（P = 0.002），胸部扫描为30.5% +/- 3.2%（P = 0.002），腹部扫描为29.7% +/- 2.9%（P = 0.002），胸部和腹部同时扫描为28.7% +/- 2.7%（P = 0.003）。没有显着的限制在图像quality were observed.Conclusions：显着的剂量减少，可以得到使用衰减为基础的在线调制管电流多层螺旋CT，而不影响图像质量。
Objective: Evaluation of the attenuation-based on-line modulation of tube current on multislice computed tomography (CT) to explore the potential of this dose-saving technique.Methods: Fifty-five patients with follow-up CT examinations were scanned without and with a CARE Dose (Siemens Medical Solutions, Erlangen, Germany). The applied dose, image noise, and subjective image quality were evaluated. The reduction in patient exposure was determined by obtaining the effective milliamperes per second for each reconstructed scan and the absolute dosage requirement for the whole scan.Results: The dose reduction achieved by applying the attenuation-based on-line modulation of tube current was 29.4% +/- 3.1% (P = 0.002) for all scans, 30.5% +/- 3.2% (P = 0.002) for the thorax scans, 29.7% +/- 2.9% (P = 0.002) for the abdomen scans, and 28.7% +/- 2.7% (P = 0.003) for the thorax and abdomen scans together. No significant restrictions in image quality were observed.Conclusions: Remarkable dose reduction can be obtained using the attenuation-based on-line modulation of tube current on multislice CT without compromising image quality.