| 韩佳悦,孙连鑫,沙琳,张晓虹,赖声远.全模型迭代重建算法评价125I粒子植入术后CT图像[J].中国医学影像技术,2018,34(7):1090~1093 |
| 全模型迭代重建算法评价125I粒子植入术后CT图像 |
| Model-based knowledge-based iterative reconstruction in evaluation of CT images after 125I seeds implantation |
| 投稿时间：2017-12-29 修订日期：2018-04-17 |
| DOI：10.13929/j.1003-3289.201712156 |
| 中文关键词: 体层摄影术,X线计算机 基于模型的完全迭代算法 125I粒子 金属伪影 |
| 英文关键词:Tomography,X-ray computed Model-based knowledge-based iterative reconstruction 125I seeds Metal artifacts |
| 基金项目:辽宁省自然科学基金（20170540236）。 |
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| 中文摘要: |
| 目的 探讨全模型迭代重建（IMR）算法评价125I粒子植入术后图像的应用价值。方法 收集接受125I粒子植入术及术后CT随访的16例腹部肿瘤患者，对扫描原始数据分别以滤波反投影法（FBP）、IMR和高级重建迭代（iDose4）算法进行重建，比较3种重建方法图像的噪声、伪影指数（AI）、CNR和主观评分。结果 FBP重建图像的噪声、CNR及AI分别为（58.65±4.03） HU、1.09±0.43和51.60±9.23，iDose4图像分别为（48.38±5.34） HU、1.29±0.48和43.77±4.91，IMR图像分别为（41.46±3.44） HU、1.58±0.56和38.51±4.64，3种重建方法图像的噪声、CNR及AI两两比较差异均有统计学意义（P均<0.05）。IMR图像的主观图像质量评分显著高于FBP和iDose4算法图像（调整后P<0.001，P=0.011）。结论 IMR算法获得的图像质量较高，可有效减少125I粒子伪影，为125I粒子植入术后随访与疗效评估提供了更佳方法。 |
| 英文摘要: |
| Objective To investigate the application value of model-based knowledge-based iterative reconstruction (IMR) in evaluation of CT images after 125I seeds implantation.Methods Totally 16 patients with abdominal tumors and CT follow-up after 125I seeds implantation were enrolled. CT data were reconstructed with the filtered back projection (FBP), IMR and iDose4 iterative reconstruction technique, respectively. The differences of noise, artifact index (AI), CNR and subjective scores were compared among three methods.Results The noise, CNR and AI of FBP images were (58.65±4.03)HU, 1.09±0.43 and 51.60±9.23, of iDose4 images were (48.38±5.34)HU, 1.29±0.48 and 43.77±4.91, of IMR images were (41.46±3.44)HU, 1.58±0.56 and 38.51±4.64, respectively. The differences of pairwise comparisons among three methods on noise, AI and CNR were statistically different (all P<0.05). The objective scores of IMR images were higher than those of FBP and iDose4 images (adjust P<0.001, P=0.011).Conclusion The images reconstructed with IMR have high quality, and can reduce the artifact of particle 125I effectively, therefore providing a better approach for postoperative follow-up and curative effect evaluation after 125I seeds implantation. |
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