The diagnostic impact of low-dosage CTA on ASO

To explore the value of low radiation dose combined with low contrast agent dose protocol in the imaging diagnosis and treatment of arteriosclerosis obliterans (ASO) in diabetes, and analyze its impact on image quality, so as to improve the safety and effectiveness of diagnosis and treatment. Select 60 ASO patients from the First Affiliated Hospital of Chengdu Medical College and randomly divide them into an experimental group and a control group, with 30 patients in each group. The experimental group was treated with low voltage and low contrast agent examination scheme, and the control group was treated with conventional examination scheme. The lower extremity arterial images were obtained by spiral computed tomography (CT) scanner, and the image quality was analyzed. There was no significant difference between low radiation dose and conventional dose in the degree of lower extremity arterial stenosis, the diagnostic coincidence rate of occlusive lesions and subjective image quality score (P > 0.05). In terms of objective image quality, the background noise increased and the signal-to-noise ratio decreased in the experimental group (P < 0.05). However, the dosage of contrast agent in the experimental group was reduced by 32.07 ml on average, and the iodine intake was reduced by 11.43 g on average. The radiation dose related indicators in the experimental group were significantly lower than those in the control group (P < 0.05). Reducing radiation dose can ensure the quality of imaging diagnosis while effectively reducing the risk of contrast nephropathy and radiation damage, providing patients with safer and more effective diagnostic methods.