Objective To evaluate the feasibility and accuracy of color M-mode Doppler flow propagation velocity (FPV) in assessment of the severity of aortic regurgitation (AR).
目的观察m -型彩色多普勒超声测定主动脉瓣返流(AR)的血流传播速度(FPV)估测AR程度的可行性及准确性。
A guided-mode resonant filter (GMRF) based on the structure of anti-reflection (ar) thin film waveguide is proposed to realize three-primary-color filter with narrow-band.
为获得性能优良的三基色窄带滤光片，提出了一种基于减反射薄膜波导光栅结构的导模共振滤光片。
A guided-mode resonant filter (GMRF) based on the structure of anti-reflection (ar) thin film waveguide is proposed to realize three-primary-color filter with narrow-band.
为获得性能优良的三基色窄带滤光片，提出了一种基于减反射薄膜波导光栅结构的导模共振滤光片。
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