The test sensitivity is high, even regret coincidence epithelial thickening or trauma of erosion: false positive, false positive but the white boundary is not clear or not.
此试验敏理性较高，巧合匀悔上皮增厚或外伤糜烂处赤露假阳性，但假阳性变白其界限不清或不规矩。
2
Considering MRA as the standard, the sensibility of diagnosing abnormal vessels by TCD was 78.10%, specificity 94.22%, false positive 7.46%, false negative 23.31%, and the coincidence rate 89.36%.