| 刘义军,刘爱连,方鑫,刘静红,刘磊,刘晓峰,袁刚,浦仁旺.70 kVp超低辐射剂量和低碘摄入量在低体质量指数患者腹部CTA的可行性[J].中国医学影像技术,2017,33(3):473~477 |
| 70 kVp超低辐射剂量和低碘摄入量在低体质量指数患者腹部CTA的可行性 |
| Feasibility of low radiation dose and iodine contrast medium in 70 kVp abdominal CTA in low body mass index patients |
| 投稿时间：2016-09-18 修订日期：2017-01-12 |
| DOI：10.13929/j.1003-3289.201609073 |
| 中文关键词: 管电压 基于多模型的自适应统计迭代重建 体质量指数 体层摄影术,X线计算机 |
| 英文关键词:Tube current Adaptive statistical iterative reconstruction Veo Body mass index Tomography, X-ray computed |
| 基金项目: |
|
| 摘要点击次数: 1870 |
| 全文下载次数: 899 |
| 中文摘要: |
| 目的 探讨70 kVp在低体质量指数（BMI；BMI≤22 kg/m2）患者腹部CTA中降低辐射剂量和碘摄入量的可行性。方法 收集临床拟诊腹部血管疾病而行全腹部CTA检查、BMI ≤ 22kg/m2的患者48例，按管电压和对比剂摄入量分为2组，A组27例，采用70 kVp（对比剂300 mgI/kg体质量）；B组21例，采用120 kVp（对比剂500 mgI/kg体质量）；其余参数两组相同；对比剂均采用350 mgI/ml的碘海醇。2名观察者分别以5分制对两组右肾动脉图像质量进行评分，对评分行一致性检验，比较两组主观评分差异性；测量A、B组的腹主动脉、腹腔干、肠系膜上动脉、肝总动脉、脾动脉的CT值及同层面竖脊肌的CT值和SD值（噪声）。比较两组上述动脉CT值、腹主动脉SNR和CNR；比较两组容积CT剂量指数（CTDIvol）和剂量长度乘积（DLP）及患者总摄碘量。结果 2名观察者对两组右肾动脉图像评分中位数均为5.00（1.00）分，差异无统计学意义（P>0.05），一致性很好（Kappa=0.932、0.911）；A组腹主动脉、腹腔干、肠系膜上动脉、肝总动脉、脾动脉的CT值均高于B组，差异均有统计学意义（P均<0.05）；A组腹主动脉SNR、CNR均高于B组，差异有统计学意义（P<0.05）；A、B组CTDIvol和DLP的差异均有统计学意义，A组CTDIvol较B组降低73.36%、DLP降低74.41%；A、B组患者总碘摄入量分别为（46.33±6.43）ml、（84.31±10.71）ml，A组较B组每例患者总碘摄入量降低45.05%。结论 针对BMI≤ 22 kg/m2患者，采用70 kVp低管电压行腹部CTA扫描，可显著提高腹主动脉及其分支的图像CNR和SNR，同时明显降低辐射剂量及患者摄入总碘量，具有很好的临床推广价值。 |
| 英文摘要: |
| Objective To explore the feasibility of reducing radiation dose and iodine contrast medium in 70 kVp abdominal CTA imaging in low-body mass index (BMI; ≤ 22 kg/m2) patients. Methods The 48 patients with suspected abdominal vascular diseases and low BMI (≤ 22 kg/m2) underwent abdominal CTA. All patients were divided into two groups according to tube voltage and contrast intake randomly. The parameters of group A (n=27) were contrast intake 300 mgI/kg, 70 kVp, the conditions of group B (n=21) were contrast intake 500 mgI/kg, 120 kVp, and the other conditions were the same in both groups. The image quality of right renal arterial images was evaluated by two observers simultaneously (5-scale). The consistency and difference between the two observers were analyzed. The CT values of abdominal aorta, celiac trunk, superior mesenteric artery, common hepatic artery, pancreatic artery and erector spinae, SD values of erector spinae on the level of right renal hilus were measured respectively in both groups. The CT values of abdominal aorta and its main branches, the CNR of abdominal aorta, the volume CT dose index (CTDIvol), dose-length product (DLP) and overall iodine intake in each group were compared. Results The scoring of right renal arterial images in both groups were 5.00 (1.00), the results showed a good consistency (Kappa=0.932, 0.911). The CT values of abdominal aorta, superior mesenteric artery, common hepatic artery and pancreatic artery in group A were all more than those of in group B (all P<0.05). The CNR of group A was higher than that of group B (P<0.05). The CTDIvol and DLP in group A decreased by 73.36% and 74.41% compared with group B. The overall iodine intakes in group A and group B were (46.33±6.43)ml and (84.31±10.71)ml, respectively. The overall iodine intake of group A decreased by 45.05% compared with group B. Conclusion For patients with low BMI (≤ 22 kg/m2), a 70 kVp tube current abdominal CTA scanning can significantly increase the contrast of images of abdominal artery and its branches. Meanwhile, the radiation dose and overall iodine intake can obviously decrease. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
