Digital Subtraction Angiography Technique Based on the Flat Panel Imaging Device

In current clinical practice , digital subtraction angiography technique is an effective vascular visualization tools . Especially in recent years , tablet - based imaging device digital subtraction angiography gradually replace traditional film and image intensifier type subtraction technology become an essential tool for medical diagnostics . How to make the subtraction more clear also become a research hotspot in recent years . In this paper, the flat panel detector type DSA as the main object of study, compared the main difference plate imaging devices DSA and DSA based on image enhancement devices , results can see the Tablet imaging DSA has the great advantage of developing . Digital subtraction angiography , for better imaging conditions DSA image , you can use the direct subtraction method . But most of the DSA image during Save Movies organ by background paper, based on the logarithmic transformation of the subtraction method , the method Save Movies vessels more clearly visible . In the process of subtraction , patients and human organs inevitable move , the subtraction image artifacts . In response to this phenomenon , this article describes the DSA image registration techniques to minimize artifacts of normal diagnosis by image registration . According to the characteristics of the blood vessel image , taken by the feature point method for image registration . First select the feature points on the angiogram , then the feature point offset is calculated on the original image . Applied with smoothing parameters based on thin-plate spline interpolation method , by varying the smoothing parameter to control the degree of deformation and smooth , so that the two images . Experimental results show that can effectively eliminate artifacts . At present, most of the DSA image meet DICOM3.0 standards , this article through in-depth research DICOM standard , do the right analysis of the DSA image the DSA image display , and can be implemented with VC 6.0 . Digital subtraction angiography technology is the ability to dynamically display the flow of the blood vessels , which clearly show the lesions, improve disease detection rate and the diagnostic accuracy , reduce the use of contrast agents to improve the security of the operation and reduce the operation costs , and therefore its will be very broad application prospects .