High-resolution CT (HRCT) datasets of CAS were imported into the MIMICS 15.0 software for image processing.  A total of 94 HRCT datasets were imported into MIMICS for verification. 
MIMICS
The other is Matlab procedure calculation, we calculated the midpoint axis values of the EAC in each Frankfurt plane.  Twenty CAS cases were selected using the sagittal reconstruction measurement method and Matlab procedure calculation to evaluate the degree of CAS.  The mean degree of CAS was 2.09 ± 0.50 mm by sagittal reconstruction measurement method and 2.03 ± 0.58 mm by Matlab procedure calculation.  Matlab procedure calculation is precise but relatively complicated and is only for scientific research. 
Matlab