国际医学放射学杂志2026，Vol.49Issue(2)：125-130,6.DOI:10.19300/j.2026.L22627
60kVp管电压联合人工智能迭代重建在头颈CTA中的应用价值
Application value of 60 kVp tube voltage combined with artificial intelligence iterative reconstruction in head and neck CT angiography
摘要
Abstract
Objective To investigate the feasibility of 60 kVp ultra-low tube voltage combined with artificial intelligence iterative reconstruction(AIIR)in head and neck CT angiography(CTA).Methods A total of 120 patients undergoing head and neck CTA were prospectively enrolled and randomly divided into 4 groups(30 cases per group):Group A[100 kVp,40 mL contrast agent,hybrid iterative reconstruction(HIR)],Group B(80 kVp,40 mL contrast agent,HIR),Group C(60 kVp,40 mL contrast agent,AIIR level 3 and 4,recorded as C3 and C4),and Group D(60 kVp,20 mL contrast agent,AIIR level 3 and 4,recorded as D3 and D4).Subjective image quality scores(5-point scale),objective parameters[noise,signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR)],radiation dose[CT dose index(CTDIvol),dose-length product(DLP),and effective dose(ED)]were compared among groups.Diagnostic accuracy was assessed using digital subtraction angiography(DSA)as the reference standard.Continuous variables were analyzed using one-way ANOVA or the Kruskal-Wallis test,categorical variables using the chi-square test,and interobserver agreement was assessed using Cohen's Kappa test.Results Baseline characteristics were well balanced among the 4 groups(all P>0.05).The subjective image quality scores were≥3 in all groups,with no significant differences among groups(all P>0.05),and inter-reader agreement was good(all κ≥0.675).Compared with Group A,image noise was significantly reduced in Group C3,C4,D3,and D4(all P<0.05).while SNR and CNR were significantly increased(all P<0.05).No significant difference was found between Groups B and A(P>0.05).The mean CT values in the low-dose groups were comparable to or significantly higher than those in Group A.Thirteen patients underwent DSA examination,and comparison with DSA demonstrated a diagnostic accuracy of 100%for CTA in all groups.Compared with Group A,radiation dose was reduced by 44.7%,77.3%,and 77.3%in Groups B,C,and D,respectively.Conclusion The 60 kVp head and neck CTA protocol combined with AIIR can maintain diagnostic-level image quality while reducing radiation dose by 77%and contrast agent volume by 50%.关键词
低剂量/体层摄影术,X线计算机/头颈动脉CT血管成像/辐射剂量/人工智能迭代重建Key words
Low-dose/Tomography,X-ray computed/Head and neck CT angiography/Radiation dose/Artificial intelligence iterative reconstruction分类
医药卫生引用本文复制引用
赵敏捷,周长圣,鲍雪芹,伊东娜,廖安宇,朱武生,程晓青,张龙江..60kVp管电压联合人工智能迭代重建在头颈CTA中的应用价值[J].国际医学放射学杂志,2026,49(2):125-130,6.基金项目
国家自然科学基金重点项目(82230068) （82230068）
国家自然科学基金项目(82271983) （82271983）
