Abstract: 320 slice dynamic volume CT provides intracranial aneurysm patience with 4D DSA imaging. The key of the technology is wide detection platform and ConeXact cone-beam reconstruction algorithm. In this thesis, some familiar cone-beam scan reconstruction algorithms are analyzed and compared, especially those algorithms which are currently developed such as Feldkamp-lype, Grangeant, Katsevich and ConeXact cone-beam reconstruction algorithm. In application aspect, 30 aneurysm patients have been through the dynamic volume scan with wide detection platform by TOSHIBA 320 slice CT. Good single-pass imaging results for 30 patients were obtained and all images had no phase artifacts. The quality of the scanning images was evaluated and compared between 320 slice CT and convention cerebral vascular DSA angiography had been done. 320 slice CT which is of a great value to diagnosing and treating intracranial aneurysm which may be used to screen out patient with susceptible intracranial aneurysm and the re-examination after the surgery the following up in the patient with aneurysm. 320 slice CT has great advantages in dynamic volume imaging and function when compared with CTA.