相控阵探头表征和系统特性校验新方法

介绍用现场检测相同的设置对相控阵探头和系统进行校验、测评和表征的方法原理。给出了用不同试块、波型、探头尺寸及不同机械测定的示例。此法易于发现参数编程中的种种错误,包括楔块角度、第一阵元高度、楔块声速及探头阵元芯距等。列举了用不同的程控参数进行裂纹检测和定量的实例。该方法可望用于承压设备焊接接头现场检测施探前对相控阵线阵探头和系统的快速校验,很有实用性。

In-vivo characterization of DALM in ulcerative colitis with high-resolution probe-based confocal laser endomicroscopy

Recently,the use of confocal laser endomicroscopy(CLE) in the diagnosis of chronic ulcerative colitis(CUC) was reported.In this brief report we aimed to assess the application of probe-based CLE to characterize colonic mucosa and dysplasia in CUC.The study involved a patient presenting long-standing CUC.Confocal imaging of both the inflamed mucosa,a circumscribed lesion(dysplasiaassociated lesional mass),and adjacent colonic mucosa are demonstrated and the correlation between the CLE and histological images.Inflamed mucosa and dysplasia showed specific alteration of crypt architecture,cellular infiltration,and vessel architecture with an excellent correlation between CLE and standard histological examination.