摘要
本文介绍B型医用超声显像系统的分辨率的各种判据,并对影响系统分辨率的诸因素作了讨论。提出了以获得空间点扩展函数(Space Point Spread Function)为目的的测量方法。对一个聚焦换能器的测量结果表明,对数放大器的使用将使系统的横向分辨率比使用线性放大器时降低60％。这个方法还能定量地测量各级电路对系统分辨率的影响。
ABSTRACTIn this thesis several criteria of resolution of B-scanning ultrasonicimaging system in medical practice are introduced and many factors in-fluencing system resolution have been discussed. The measurement methodfor the purpose of obtaining the space point spread function is suggested.The measurement results of a focus transducer show that the lateral systemresolution obtained by using a logarithmic amplifier will be 2.5 timeslower than that by using a linear amplifier. This method can measureeven quantitatively the influence of the circuit at various stage on thesystem resolution.
出处
《中国生物医学工程学报》
CAS
1982年第1期50-53,共4页
Chinese Journal of Biomedical Engineering
