摘要
消除背景结构影像、突出血管信息是DSA技术中的基本要求。由于X线成像过程的复杂性和非线性 ,普通的减影方法并不能完全消除与血管重叠的其它组织的影像。通过以“等效单能”模型对具体DSA系统的成像过程进行了分析校正 ,最终的减影结果表明了这种方法是有效的。
How to eliminate the background of other tissue and to protrude the blood vessel infoimations is the basic requirements in DSA.Because of the complexity and non_linearity of the X_ray imaging process,the common DSA technique cannot completely remove other tissue's image which lapped over the vessels.By experiments,this paper analyses and corrects the imaging process of the actual DSA system based on the 'equivalent single energy'model,and the results indicate the validity of this method.
出处
《中国医疗器械杂志》
CAS
2002年第1期17-19,共3页
Chinese Journal of Medical Instrumentation
关键词
数字减影
等效单能
灰度校正
数字减影血管影术
digital subtraction angiography,equivalent single energy,gray_level correction
