〔Abstract〕 Objective To explore the feasibility of the adaptive statistical iterative reconstruction-V(ASiR-V) in piglet abdominal CT volume scanning,and the optimal low dose level to maintain image quality,so as to provide reference for optimizing combination of pre-and post-ASiR-V percentage in children's abdominal CT scan. Methods A total of 10 standard piglets were selected and scanned to obtain plain and enhanced images under different preASiR-V conditions,and the corresponding images were obtained using post-ASiR-V reconstruction. CT values,noises,subjective scores,and radiation doses of unenhanced and enhanced abdominal tissues were analyzed respectively,and the data of each group were statistically analyzed. Results With the increase of pre-ASiR-V,the radiation dose in piglets gradually decreased(P<0.05). In the same pre-ASiR-V group and with the increase of postASiR-V,SD values gradually decreased,and the CNR values did not change or increase. In plain scan images,the subjective score of the images with 40% pre-ASiR-V combined 60% post-ASiR-V was similar to 0% pre-ASiRV combined 60% post-ASiR-V,and the radiation dose was reduced by 31. 61%. In the enhanced images,the subjective score of the images with 60% pre-ASiR-V combined 60% post-ASiR-V was similar to 0% pre-ASiR-V combined 60% post-ASiR-V,and the radiation dose was reduced by 48. 9%. Conclusion ASiR-V can significantly reduce the radiation dose without affecting image quality,and it is recommended to use 40% pre-ASiR-V combined with 60% post-ASiR-V for children's abdominal CT plain scan,and 60% pre-ASiR-V combined with 60% postASiR-V for children's abdominal CT enhanced scan,which is beneficial to theoretically reduce the damage of radiation dose.