BACKGROUND: Computed tomography angiography (CTA) is the most employed modality in the follow-up after @entity439 repair (EVAR) of abdominal aorta (AA); repeated standard controls expose @entity1 to a high cumulative radiation dose (RD). PURPOSE: To compare image quality and RD between 100   kV and 120   kV protocols in the same group of @entity1 , previously treated with EVAR. MATERIAL AND METHODS: Thirty @entity1 , who had performed a previous CTA at 120   kV, underwent a low dose CTA with the same 64-detector machine. Images were evaluated qualitatively and quantitatively. The influence of body mass index (BMI), considering three groups of @entity1 (normal weight, overweight, and @entity28 ) was also assessed. RD values (volume CT dose index and effective dose) were calculated. RESULTS: The mean qualitative score at 100   kV was worse than that at 120   kV, but the difference was not statistically significant and in all cases the image quality was satisfactory. At 100   kV the vessels mean attenuation value was significantly higher; signal-to-noise ratio significantly lower; contrast-to-noise ratio lower, but the difference was not significant. Regarding BMI, the difference in the qualitative score was significant in the @entity28 group, but not in the other two groups; of the quantitative parameters only the signal-to-noise ratio presented a significant difference in the @entity28 group. The average CTDIvol was reduced by 22% and the mean effective dose by 36% with the 100   kV protocol compared to the 120   kV protocol. Both differences were significant. CONCLUSION: The 100   kV protocol allowed a consistent RD reduction, maintaining a satisfactory image quality in all @entity1 .

Role of low dose CT angiography in the follow-up after XXXX repair of abdominal aorta.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity439 :: ('MESH:D000783', 'Disease') :: ['endovascular aneurysm'] @entity28 :: ('MESH:D009765', 'Disease') :: ['obese']
@entity439 :: (MESH:D000783,Disease) :: ['endovascular aneurysm']
