| 余 娜,王军大,李治勇,傅浪舟,胡 桃.能谱CT单能量成像联合自适应迭代重建技术对头颈部CT血管成像质量影响及应用价值研究[J].,2021,(9):1734-1737 |
| 能谱CT单能量成像联合自适应迭代重建技术对头颈部CT血管成像质量影响及应用价值研究 |
| Evaluation of Quality and Application of Single Energy Imaging Combined with Adaptive Statistical Iterative Reconstruction Technique in Head and Neck CT Angiography |
| 投稿时间：2020-09-07 修订日期：2020-09-30 |
| DOI：10.13241/j.cnki.pmb.2021.09.029 |
| 中文关键词: 能谱CT 单能量成像 自适应迭代技术 头颈部 CT血管成像 |
| 英文关键词: Energy spectrum CT Single energy imaging Adaptive statistical iterative reconstruction Head and neck CT angiography |
| 基金项目:重庆市卫生计生委中医药科技项目( ZY201802025)；重庆市自然科学基金面上项目(cstc2019jcyjmsxmX0555) |
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| 中文摘要: |
| 摘要 目的：探讨能谱CT单能量成像联合自适应迭代重建（ASiR）技术对头颈部CT血管成像（CTA）质量影响及应用价值研究。方法：收集2019年1月至2019年12月于本院接受头颈部CTA的120例患者的影像及临床资料；随机分为A组、B组及C组，每组40例，A组进行能谱CT（60keV）+ASiR（40%），B组进行CT（60keV）+滤波反投影（FBP），C组进行常规CT扫描+FBP。比较三组间动脉期右侧颈内动脉C7段CT值、图像噪声值、信噪比、对比噪声比及图像质量主观评分，记录三种处理方法辐射剂量。结果：三组间右侧颈内动脉C7段CT值、背景噪声（SD）、信噪比（SNR）、对比噪声比（CNR）及主观评分比较差异均有统计学意义（P<0.05）；进一步两两比较发现，右侧颈内动脉C7段CT值A组>B组>C组，其中A组与B组间差异无统计学意义（P>0.05），A组与C组、B组与C组间差异有统计学意义（P<0.05）；图像SD为A组0.05）；SNR与CNR均为A组>B组>C组，且A组与B组、A组与C组、B组与C组间两参数差异有统计学意义（P<0.05）；主观评分A组>B组>C组，且A组与B组、A组与C组、B组与C组间差异有统计学意义（P<0.05）。三组间容积CT剂量指数（CTDLvol）、总剂量长度乘积（DLP）、有效剂量（ED）比较差异均有统计学意义（P<0.05）；进一步两两比较发现，CTDLvol、DLP、ED均为A组0.05），但A组与C组、B组与C组间各剂量参数间差异有统计学意义（P<0.05）。结论：能谱CT单能量成像联合ASiR可明显提高头颈部CTA图像质量且降低患者辐射剂量，推荐临床使用60keV联合40%ASiR图像。 |
| 英文摘要: |
| ABSTRACT Objective: To study the quality and application value of head and neck CT angiography (CTA) with single energy imaging and adaptive statistical iterative reconstruction (ASiR) technique. Methods: The imaging and clinical data of 120 patients who received head and neck CTA in our hospital from January 2019 to December 2019 were collected. The patients were randomly divided into three groups: group A (n=40), group B (n=40) and group C（n=40）. The patients in group A underwent energy spectrum CT (60keV)+ASiR (40%), in group B (n>40%), underwent CT (60keV) + filtered back projection (FBP), and in group C (n>40), underwent conventional CT scan + FBP. The CT value, image noise value, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and subjective score of image quality were compared among the three groups. Results: There were statistically significant differences in CT value, background noise (SD), signal-to-noise ratio (SNR), contrast noise ratio (CNR) and subjective score of right internal carotid artery among the three groups (P<0.05); further pairwise comparison showed that CT value of C7 segment of right internal carotid artery in group A > group B > group C, and there was no significant difference between group A and group B(P>0.05), but there was statistical difference between group A and group C and between group B and group C There were significant differences between group A and group B, between group A and group C (P<0.05), but there was no significant difference between group B and group C (P>0.05); SNR and CNR were group A > group B > group C, and there were significant differences between group A and group B, group A and group C, group B and group C (P<0.05); subjective scores of group A > group B > group C, and group A and group C, group B and group C had significant differences (P<0.05) There were significant differences between group A and group C, group B and group C(P<0.05). The difference of ctdlvol, DLP and ED among the three groups was statistically significant(P<0.05); further pairwise comparison showed that ctdlvol, DLP and ed in group A < group B < group C. There was no significant difference in ctdlvol, DLP and ED between group A and group B(P>0.05), but there were differences between group A and group C, between group B and group C The difference was statistically significant (P<0.05). Conclusion: Energy spectrum CT combined with ASiR can improve the image quality of head and neck angiography and reduce the radiation dose. 60keV combined with 40% ASiR is recommended for clinical application. |
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