优化碘对比剂剂量联合低管电压在头颈部CTA中的应用价值

打开文本图片集

中图分类号：R814.43 文献标志码：A DOI：10.3969/j.issn.1003-1383.2025.09.007

Application value of optimization of iodine contrast agent dosage combined with lowtubevoltage in headand neck CTA

PUChanghong，WU Yingning，MA Shijing，LI Baosheng （Departmentof Radiology，Affiliated Hospital of YoujiangMedical UniversityforNationalities，Baise533ooO，Guangxi，China）

【Abstract】ObjectiveTo explorethe aplication value of lowdoseof iodine contrastagent combined with low tube voltage in head and neck CTangiography（CTA）.MethodsA prospective study was conducted，and12O patients who underwent headandneck CTA wererandomlydivided into two groups，with 6Opatients ineachgroup，anddiferent scanning andcontrast medium injection protocolswereemployed for each group.Study group were given low-dose iodinated contrast agent （5 mL） with an 8O kV tube voltage，and a contrast agent dosage of 0.6mL/kg ，while control group were given a standard-dose iodinated contrast agent（15 mL）with a 100kV tube voltage，and a contrast agent dosage of 0.9mL/kg Andthen，basic information，imagequalityscores，signal-to-noiseratio（SNR）andcontrast-to-noiseratio（CNR）of main vessels，as wellasCTdoseindex（CTDIvol），dose-length product（DLP），efectiveradiation dose（ED），and iodine contrastagentdosage between thetwo groups werecompared.ResultsThere was no statisticallysignificant diference in age，gender，BMI，and subjective image quality scores between the two groups （ P>0.05 ）. Similarly，there was no statistically significant difference in main vessel SNR and CNR between the two groups（ P>0.05 ）.The CTDIvol，DLP，ED，and iodinecontrast mediumusageofthestudy group weresignificantlylowerthan thoseof thecontrol group，andthedifference was statistically significant （ P<0.05 ）.ConclusionRational optimization of iodinated contrast volume and reduction of tube voltage in headandneck CTAcan preserve diagnostic imagequalitywhile significantlylowering bothradiation exposure andiodineloadtothepatients.However，furtherexplorationisstillneededforlowerefectivetubevoltagevaluesandmoreoptimized contrast agent dosages.

【Keywords】 head and neck；CT angiography（CTA）；iodine contrast agent；tube voltage；radiation dose

头颈部CT血管成像（CTangiography，CTA）作为一种关键的诊断工具，对诊断动脉瘤、狭窄等血管问题非常有效。（剩余5504字）