Comparison of subtraction CT angiography and conventional CT angiography with bone elimination technique in cerebral vessel

Objective To evaluate the difference of recontruction time and image quality of cerebral angiographic reconstruction between the subtraction CT angiography technique and conventional CT angiography. Methods 30 cases performing subtraction CT angiography and conventional CT angiography CT scan by GE VCT respectively were retrospectively selected radomly. CT raw data were reconstructed with volume rendering (VR) and maximum intensity projection (MIP) techniques to display the vessels. The post-processing time and the image quality were compared. Results The image quality of the subtraction CT angiography and Conventional CT vessel reconstruction was both excellent (100%),the average time of post-processing taken by the subtraction CT angiography (3.59±2.55 s) was much shorter than that of conventional CTA (14.71±2.95 s) (P0.05). Conclusion The image quality of subtraction CT angiography technique were good and reconstraction faster than conventional one. The subtraction CT angiography technique could be the first choice in cerebral vessel angiography.