Objective To study the effects of gantry rotation time on image quality in 64 - slice spiral ct.
目的研究不同机架旋转时间对64层螺旋CT图像质量的影响。
The geometric error of axial image reconstruction increases with the increase of CT scan slice thickness, due to CT partial volume effect.
重建CT图像的前后方向的几何误差是随着扫描层厚增加而增加，主要是由于CT扫描的部分容积效应影响。
Conclusion Image quality of 64-slice ct coronary angiography affected by the patient's heart rate, fluctuation of heart rate, breathing artifact and reconstruction phase.
结论64层螺旋ct冠状动脉成像质量受到患者心率、心率波动幅度、呼吸运动伪影及重建时相的影响。
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