Application value of dual source CT Flash scanning mode combined with low-dose pulmonary artery CTA in the diag-nosis of pulmonary embolism

YU Hongtao; WANG Feng; WANG Wei; CAO Yizhi; LI Yiren; YANG Guilun

doi:10.20258/j.cnki.1006-9011.2025.02.012

Abstract：Objective To explore the application value of dual source CT Flash scanning mode combined with low concentra-tion contrast agent scanning technology for pulmonary artery CTA in the diagnosis of pulmonary embolism,and to analyze its fea-sibility.Methods A total of 72 clinically suspected pulmonary embolism were collected and randomly divided into an observation group(L group)and a control group(S group)based on different scanning schemes.Among them,36 patients in the L group re-ceived dual source CT Flash scanning mode combined with low concentration contrast agent scanning technology for pulmonary artery CTA,while,36 patients in the S group received conventional dual source CT pulmonary artery CTA scanning.The two scanning schemes were compared and analyzed in terms of scanning time,radiation dose.The application value of dual source CT Flash scanning mode low-dose pulmonary artery CTA in the diagnosis of pulmonary embolism was explored by comparing the subjective evaluation of image quality and the objective evaluation of image quality(CT value,SNR,CNR).Results There was no statistically significant difference(P>0.05)between the subjective and objective evaluations(CT value,SNR,CNR)of image quality between the two examination plans.Compared with Group S,the radiation dose,contrast agent dosage,and scan-ning time of Group L were significantly reduced,and the differences were statistically significant(P<0.05).Conclusion The dual source CT Flash scanning mode combined with low concentration contrast agent scanning technology for pulmonary artery CTA can significantly reduce scanning time and radiation dose without reducing image quality,which is worthy of promotion and application.