扫描方式对64层螺旋CT头颅 CTA图像质量和辐射剂量影响的研究
소묘방식대64층라선CT두로 CTA도상질량화복사제량영향적연구
Comparison study of image quality and radiation dose between helical and axial CT angiography of the head with 64-slice helical CT
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