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作者用２°星模测试卡，在不同负载条件下，对微焦点和小焦点的“等效焦点”尺寸、焦点极限分辨率分别进行了测试对比。结果提示微焦点高仟伏摄影的成像质量显著优于常规摄影。其等效焦点受负载条件变化的影响很小，焦点极限分辨率高，成像质量稳定。微焦点高仟伏集两种摄影优势于一体，更加优化了焦点的成像质量，使Ｘ线影像质量得以稳步提高。
The authors use 2 ° star test card, under different load conditions, the micro-focus and small focus of the “equivalent focal point” size, focus limit resolution were tested and compared. The results suggest that the imaging quality of micro-focal high-kv photography is significantly better than that of conventional photography. The equivalent focal point has little effect on the change of load conditions, the focal limit resolution is high and the imaging quality is stable. Microfocus Nuvo set the two advantages of photography in one, and more to optimize the focus of the imaging quality, X-ray image quality can be steadily improved.