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随着多排螺旋CT(MDCT/VCT)在心脏成像方面的应用,冠状动脉CT血管成像已成为最重要的冠心病治疗前筛查,治疗后复查的手段[1]。由于心脏成像中所使用的层厚较薄螺距小,这样人们对CT检查的X射线剂量对人体可能存在的潜在危害和如何减少患者的受线剂量及保证图像质量正在成为国内外
With the application of multi-slice spiral CT (MDCT / VCT) in cardiac imaging, coronary CT angiography has become the most important pre-treatment screening and treatment for coronary heart disease [1]. Because of the thin layer thickness used in cardiac imaging, the potential harm to the human body from the X-ray dose of CT examination and how to reduce the patient’s receiving dose and the quality of the image are becoming a great challenge both at home and abroad