The FPD digital angiography system replaces the traditional II-TV image chain with FPD, eliminating the need for multiple conversions of intermediate links (II, optical systems, cameras, analog-to-digital converters), and obtaining digital images directly from the FPD, avoiding The distortion, noise and resolution caused by the transmission of multiple links in the traditional image chain reduce the complex peripheral control part, making the control more direct and simple. The FPD digital angiography system shows that the traditional II-TV angiography system can not match. Technical advantages.
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The main advantages of the FPD digital angiography system compared to traditional DSA systems:
(1) The spatial resolution and density resolution of the image are high, the image is rich in layers, and the details are clearly visible;
(2), the dynamic range of imaging is large (10 times that of the traditional DSA system), and it is more convenient for image post-processing;
(3) High detection quantum efficiency (DQE) and modulation transfer function (MTF);
(4), can do fast acquisition (25 frames / sec, 1024 matrix perspective and photography acquisition);
(5), low radiation dose, some companies introduced, FPD can reduce the dose by 60% than the traditional DSA system;
(6), afterglow is small, and the geometric distortion of the edge is eliminated, the image is free of white or black areas, no saturation artifacts, and the image quality is good, especially for low-density catheters, guide wires and brackets. However, the FPD digital angiography system also lacks the image display is not soft, the image background is not transparent. In short, the FPD digital angiography system still has room for continuous improvement.
So far, the FPD digital angiography system and the traditional digital angiography system are in a fairly good position in terms of imaging quality. With the stability and maturity of FPD technology, it has shown great development potential. In the long run, the prospect of the FPD digital angiography system will be better.
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