能谱CT最佳单能量技术、多模型迭代重建算法及虚拟平扫联合应用在头颈CTA应用研究  

Application Study of the Combined Application of Spectral CT Optimal Single Energy Technique,Adaptive Statistical Iterative Reconstruction-V and Virtual Plain Scan in Head and Neck CTA

作　　者：李文超 李强[1] 李晨光 户彦龙[1] 梁长华[1] LI Wen-chao;LI Qiang;LI Chen-guang;HU Yan-long;LIANG Chang-hua(Department of Radiology,The First Affiliated Hospital of Xinxiang Medical College,Weihui 453100,Henan Province,China)

机构地区：[1]新乡医学院第一附属医院放射科,河南卫辉453100

出　　处：《中国CT和MRI杂志》2023年第12期38-41,共4页Chinese Journal of CT and MRI

基　　金：河南省医学科技攻关计划省部共建项目(SBGJ2018057)。

摘　　要：目的探讨能谱CT最佳单能量技术、多模型迭代重建算法(ASIR-V)重建及虚拟平扫联合应用在脑血管疾病(CVD)头颈部CT血管造影(CTA)的应用价值。方法前瞻性选择2022年6月15日2022年至8月20日于新乡医学院第一附属医院接受头颈部CTA检查的113例CVD患者,按扫描方式及对比剂用量分为常规剂量组(49例)、能谱低剂量组(49例)、能谱超低剂量组(15例)。常规剂量组采用常规扫描,对比剂剂量0.9mL/kg,注射速率为5mL/s,能谱低剂量组应用能谱CT最佳单能量技术联合50%ASIR-V重建,对比剂剂量0.6mL/kg,注射速率为5mL/s,能谱超低剂量组应用能谱CT最佳单能量技术、50%ASIR-V重建和虚拟平扫成像技术,对比剂剂量0.55mL/kg,注射速率为5mL/s。比较三组图像质量、动脉CT均值、噪声比(CNR)、信噪比(SNR)、容积CT剂量指数(CTDIvol)、剂量长度乘积(DLP)、有效剂量(ED)、碘摄入量和对比剂用量。结果能谱超低剂量组和能谱低剂量组主动脉弓CT值、颈总动脉CT值、颈内动脉CT值、大脑中动脉M1段CT值、颈部血管SNR、颈部CNR、脑部血管SNR、脑部血管CNR均低于常规剂量组(P<0.05),且能谱超低剂量组主动脉弓CT值、颈总动脉CT值、颈内动脉CT值低于能谱低剂量组(P<0.05)。能谱超低剂量组和能谱低剂量组图像质量优于常规剂量组(P<0.05)。能谱超低剂量组和能谱低剂量组CTDIvol、DLP、ED、对比剂用量、碘摄入量均低于常规剂量组(P<0.05),且能谱超低剂量组对比剂用量、碘摄入量低于能谱低剂量组(P<0.05)。结论能谱CT最佳单能量技术联合ASIR-V、虚拟平扫技术能改善图像质量,降低放射剂量和对比剂剂量,在头颈部CTA中具有更高的应用价值。Objective To investigate the application value of spectral CT optimal single energy technique,Adaptive Statistical Iterative Reconstruction-V(ASIR-V)reconstruction and virtual plain scan in head and neck CT angiography(CTA)of cerebrovascular diseases(CVD).Methods 113 patients with CVD who received head and neck CTA examination in the First Affiliated Hospital of Xinxiang Medical College from June 15,2022 to August 20,2022 were prospectively selected,and they were divided into conventional dose group(49 cases),energy spectrum low-dose group(49 cases)and energy spectrum ultra-low-dose group(15 cases)according to scanning method and the dosage of contrast agent.In the conventional dose group,conventional scanning was performed,the contrast agent dosage was 0.9mL/kg,and the injection rate was 5mL/s,in the energy spectrum low-dose group,the spectral CT optimal single energy technique combined with 50%ASIR-V reconstruction was performed,the contrast agent dosage was 0.6mL/kg,and the injection rate was 5mL/s.In the energy spectrum ultra-low-dose group,the spectral CT optimal single energy technique,50%ASIR-V reconstruction and virtual plain scan imaging technology were used,the contrast agent dosage was 0.55mL/kg,and the injection rate was 5mL/s.The image quality,mean arterial CT,contrast-to-noise ratio(CNR),signal-to-noise ratio(SNR),volume CT dose index(CTDIvol),dose-length product(DLP),effective dose(ED),iodine intake and contrast agent dosage of the three groups were compared.Results The aortic arch CT values,common carotid artery CT values,internal carotid artery CT values,M1 segment CT values of middle cerebral artery,neck vessel SNR,neck CNR,brain vessel SNR,and brain vessel CNR in the energy spectrum ultra-low-dose group and energy spectrum low-dose group were all lower than those in the conventional dose group(P<0.05).The aortic arch CT values,common carotid artery CT values and internal carotid artery CT values in the energy spectrum ultra-low-dose group were lower than those in the energy spectrum low-dose gr

关 键 词：脑血管疾病 CT血管造影 能谱CT 虚拟平扫 多模型迭代重建技术 辐射剂量 对比剂剂量 

分 类 号：R743[医药卫生—神经病学与精神病学]