Abstract：Objective To explore the applied value of low tube voltage and low dose contrast agent combined with iDose4 iterative
reconstruction in head and neck artery CT angiography. Methods A total of 68 patients suspected of head and neck artery disease
by clinic were divided into double low dose group (group A) and routine dose group (group B) randomly, and there were 34 cases
in each group. In group A, tube voltage was 80 kV and contrast dose was 55 mL, and with iDose4-5 iterative reconstruction; while
in group B, tube voltage was 120 kV, contrast dose was 85 mL, and with filtered back-projection. Non-ionic contrast
agent iohexol (300 mgI/mL) were injected in 2 groups and the flow rate were 5.0 mL/s all, and with 30 mL normal saline were
injected subsequently (flow rate were 5.0 mL/s all), the other parameters were the same in 2 groups. The differences of subjective
score, CT value of artery, noise, SNR, CNR, CTDIvol, DLP and ED between the two groups were analyzed and compared. Results
There was no difference in the subjective score of the two groups of images (P>0.05), and the noise of group A was slightly higher
than that of group B, the CT value of different levels, SNR and CNR were higher than those of group B (P<0.05), while CTDIvol,
DLP and CNR of group A were significantly lower than those of group B, The difference was statistically significant (P<0.05).
In group A, the effective radiation dose was decreased by 74.15% compared to group B, and iodine intake decreased by 35.29%.
Conclusion Double low dose combined with iDose4 iterative reconstruction technique in the head and neck artery CT angiography
can guarantee the image quality, while the radiation dose and the dosage of contrast agent can be reduced significantly, and show high
applicative value in clinic.
林观生a，马周鹏a，付文兵a，邓君启b. 双低剂量联合iDose4迭代重建在头颈部CTA中的应用[J]. 中国医疗设备, 2019, 34(3): 68-71.
LIN Guansheng a, MA Zhoupeng a, FU Wenbing a, DENG Junqib. Application of Dual Low-Dose Combined iDose4 Iterative Reconstruction in Head and Neck CTA. China Medical Devices, 2019, 34(3): 68-71.
