Experimental And Clinical Studies Of Power Doppler Imaging

With the clinical application of color Doppler flow imaging (CDFI), this noninvasive diagnostic method has been showing its great usefulness in the diagnosis of cardiovascular diseases, in the differentiation of benign tumors from the malignant ones, and in the evaluation of tissue blood perfusion. But limited by certain technical and physiological factors, CDFI exhibits some defects, such as its low sensitivity to lower speed blood flow, its angle dependence, the production of aliasing and relatively low spatial resolutions, which may prevent it from producing ideal flow imaging and also limit its clinical application. The newly-introduced power Doppler imaging (PDI) has overcome the above mentioned defects of CDFI. Since the first official report of the application of PDI in kidney blood perfusion in 1994, PDI has been found to have distinct advantages in the low speed blood flow imaging. However, there have also been some adverse reports on the comparison of PDI with CDFI because of the limited experimental and clinical applications of PDI. So, it is absolutely necessary to further the research, both experimentally and clinically, and by the comparison with CDFI, into the sensitivity, accuracy, influencing factors and the clinical practicability of PDI.Purposes...