In order to optimize 3D display performance for volume data of industrial CT

it is necessary to accelerate slice display. Programming method based on graphics processing unit(GPU)is applied to volume display algorithm.Because GPU render complex scenes using a programmable parallel pipeline and slice display algorithm is implemented by graphics application which call fragment shading program

many programmable fragment processors can contemporaneously sample for lots of pixels. A slice display algorithm of CT volume based on GPU is presented. Firstly loading and preprocessing industrial CT volume data are interpreted. Then design steps of Cg application and fragment shading program are presented. Experiments of cutting muli-slice industrial CT images is carried out

the experimental results show that slice image generated by GPU algorithm is clear

the frame rate is steady and high

speed of computing is 2~9 times than CPU algorithm’s.It meets the needs of industrial CT image system in terms of rapid 3D display.