Application evaluation of preoperative location of adamkiewic artery by CT angiography with 100 kV combined interative metyod

LI Sheng-hui; SUN Gang; DING Juan; LIU Ming-zhen; LI Guo-ying

Abstract：Objective To explore the clinical value of preoperative localization of adamkiewicz artery by 320‐row compu‐ted tomography (CT) angiography for patients undergoing endovascular aortic repair with 100 kV combined iterative meth‐od .Methods 36 patients with aortic lesions underwent 320‐row CT angiography with 100 kV .Images were reconstructed by iterative algorithm method .Volume rendering (VR) ,the axial ,coronal and oblique coronal multiplanar reformations (MPR) and maximum intensity projections (MIP) were generated and displayed .The detected ratio ,image quality of AKA and radiation dose were evaluated and compared with those of 120 kV group .Results AK artery was typically shown as "hairpin"‐like structure in coronal and oblique coronal image .The detected ratio of AKA was 88 .89% (32/36) and 88.46% (23/26) respectively in 100 kV group and 120 kV group .There were no significant differences between the two groups for the detected ratio and image quality .The mean effective dose for the 100 kV group was significantly lower than that for the 120 kV group (9 .94 and 14 .35 mSv) ,with a reduction of radiation dose of 31 .73% .Conclusion 100 kV combined iterative method of CT angiography can localize AK artery accurately ,while significantly reducing the radiation dose of the patient .