Study on the influence of Different Tube Current CT Scanning Protocols on Radiation Dose in Patients with Atrial Fibrillation
Objective To study the effect of different tube current computed tomography(CT)scanning protocols on radiation dose in patients with atrial fibrillation.Methods The clinical data of 133 patients with atrial fibrillation who underwent catheter ablation in our hospital from July 2020 to November 2022 were retrospectively analyzed.According to the tube current level of chest CT scan,patients were divided into microtubule current group(tube current is 30mAs),low tube current group(tube current is 50mAs),medium tube current group(tube current is 100mAs)and senior management current group(tube current is 200mAs),with 30 cases,37 cases,34 cases and 32 cases respectively.Radiation dose[CT dose index(CTDI),CT dose length product(DLP),effective radiation dose(ED)],objective image quality[CT value,contrast-noise ratio(CNR),signal-to-noise ratio(SNR)],subjective image quality[anatomical structure display,noise,image definition],left atrium(LA)diameter,LA diverticulum were recorded in the four groups of patients Display rate,display rate of pulmonary vein(PV)anatomic variation.Results The difference of radiation dose between the four groups was statistically significant(P＜0.05).CTDI,DLP and ED in the microtubule current group were lower than those in the low,medium and senior management current groups(P＜0.05),and CTDI,DLP and ED in the low tube current group were lower than those in the middle and senior management current groups(P＜0.05).CTDI,DLP and ED in middle tube current group were lower than those in senior management current group(P＜0.05).The CT values,SNR and CNR of LA,left superior pulmonary vein(LSPV)and right superior pulmonary vein(RSPV)in microtubule current group were lower than those in low,medium and senior management current groups(P＜0.05),but there were no significant differences in CT values,SNR and CNR of LA,LSPV and RSPV in low,medium and senior management current groups(P＞0.05).The anatomical structure display,noise and image clarity scores of microtubule current group were lower than those of low,medium and senior management current groups(P＜0.05),but there were no significant differences in anatomical structure display,noise and image clarity among low,medium and senior management current groups(P＞0.05).The LA diameter,LA diverticulum display rate and PV anatomical variation display rate in the microtubule current group were lower than those in the other three groups(P＜0.05).There were no significant differences in the LA diameter,LA diverticulum display rate and PV anatomical variation display rate in the low,medium and senior current groups(P＞0.05).Conclusion Compared with 100mAs and 200mAs tube current,the radiation dose of CT scan with 50mAs tube current in catheter ablation for patients with atrial fibrillation is significantly lower,and the image quality obtained can also meet relevant standards.
Atrial FibrillationCatheter AblationElectronic Computed TomographyTube CurrentRadiation DoseQuality of Image
NETL
NSTL
万方数据
维普
