Methods: Digital computerized tomography measurement techniques were used to determine the difference in length between the nasal and oral aerodigestive tracts.
方法：数字化计算机控制体层摄影测量技术被用来确定呼吸消化道起始端鼻腔和口腔之间的解剖长度差异。
2
For the first time, the area formatted by the outline of cultured ovule and fibers was determined using digital image analysis software. This method is relative easier than lengthmeasurement.