Feasibility Study of Double Low Dose Pulmonary Angiography(CTPA)Imaging in Diagnosis of Pulmonary Embolism
Objective To investigate the feasibility of pulmonary angiography(CTPA)with 64-slice spiral CT in the diagnosis of pulmonary embolism at low iodine contrast dose and low radiation dose.Methods A total of 60 patients suspected to have pulmonary embolism in our hospital from 2021 to 2023 were selected.All subjects underwent CTPA examination.Subjects were divided into a conventional dose group with a dose of iodine contrast 30-40mL(120KV)and a low-dose group with a dose of iodine contrast 30-40mL(100KV)and a non-ionic water-soluble iodine contrast agent iomepol(400gl/100mL).The patients in both groups were suffused with breath.CT values,background Noise,Signal to Noise Ratio(SNR)and Computed Tomography Dose Index were compared between the two groups.CTDIvol),Dose Length Product(DLP).Results There were significant differences in CT value,background noise,SNR,DLP and CTDIvol between low-dose group and conventional dose group(P＜0.01).There was no statistical significance in image quality between the low-dose group and the conventional dose group(P＞0.05).The detection rate of arterial embolism in the low-dose group was not statistically significant compared with the conventional dose group(P＞0.05).Condusion The Contrast Induced Nephronpathy(CIN)and the dose of radiation received by CTPA can be reduced by using double low dose.Moreover,double low-dose CTPA imaging is highly feasible and worthy of clinical application and promotion for pulmonary embolism.
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NSTL
万方数据
维普
