Objective:To investigate bepainted membrance method(BMM) for measuring expanded area in skin and soft tissue expansion(SSTE).Method:To establish three groups of SSTE measuring method model:BMM model

traditional model and golden standard model.Using BMM to obtain 3D images from standard.Flat 3D images to 2D images and translate them to the digital images.Three groups of expanded area data which were measured by Image-Pro Plus(IPP) from digital images has been collected statistics with Statistical Product and Service Solutions(SPSS).Repeated measurement design has been chosen in this research.Determining t-test to appraise the different between each group.The coefficient of variation(CV) was used as an indicator of precision;the difference between arithmetic mean and physical standard was used as an indicator of accuracy.Result:Statistical analysis shows:t-test:t1

3=0.107

P>0.91

no significant different was found between BMM and golden standard;t2

3=19.150

P<0.01

significant different was found between traditional method and golden standard.CV1=1.97%

CV2=2.52%

CV3=0.04%.The difference between arithmetic mean and physical standard in BMM group is less than 0.05%.Conclusion:The BMM described in this research represents a precision

accuracy

without any damage

and inexpensive simple technique to measure the expanded area of SSTE in clinic.