| 陈晓聪,翟翼,田红平,蒲坤,陈友强,黄熠龙,罗银灯.高级患者运动校正技术用于儿童胸部CT成像[J].中国医学影像技术,2025,41(5):811~815 |
| 高级患者运动校正技术用于儿童胸部CT成像 |
| Advanced patient motion correction technology applicated in pediatric chest CT imaging |
| 投稿时间：2024-11-30 修订日期：2025-04-01 |
| DOI：10.13929/j.issn.1003-3289.2025.05.024 |
| 中文关键词: 儿童 胸部 体层摄影术,X线计算机 伪迹 算法 |
| 英文关键词:child thorax tomography, X-ray computed artifacts algorithms |
| 基金项目: |
|
| 摘要点击次数: 60 |
| 全文下载次数: 19 |
| 中文摘要: |
| 目的 观察高级患者运动校正(APMC)技术用于改善低剂量儿童胸部CT成像质量的价值。方法 回顾性纳入96例患儿的低剂量胸部CT扫描数据,分别以全重建技术(FULL)及APMC技术重建肺窗及纵隔窗图像,对重建图像的清晰度、运动伪影、结构边缘清晰度及总体质量进行主观评价;测量ROI内单位密度像素平均CT值,以其标准差(SDCT)为图像噪声并计算信噪比(SNR),检测图像Sobel算子边缘,记录ROI内平均灰度值(G)及其标准差(SDSobel),进行客观评价。比较FULL重建及APMC重建校正后肺窗及纵隔窗图像质量主、客观评价结果及Sobel输出图参数。结果 相比FULL重建,APMC重建校正后图像中的运动伪影减少、边缘结构清晰度提高、总体质量提高(P均＜0.05)而清晰度无明显改善(P＞0.05),且重建肺窗平均CT值、肺窗SDCT及纵隔窗SDCT均增加(P均＜0.05)而纵隔窗平均CT值差异无统计学意义(P＞0.05),同时肺窗、纵隔窗SNR均降低(P均＜0.05)。经边缘检测后Sobel输出图中,相比FULL重建,APMC重建肺窗及纵隔窗图像的G及SDSobel均增加(P均＜0.05)。结论 APMC技术用于儿童胸部CT成像能有效减少运动伪影、改善结构边缘清晰度及图像质量,提高诊断敏感度。 |
| 英文摘要: |
| Objective To observe the value of advanced patient motion correction (APMC) technology for improving imaging quality of low-dose pediatric chest CT. Methods Ninety-six children who received low-dose chest CT scan were retrospectively enrolled. CT images were reconstructed using full reconstruction technique (FULL) or APMC for both lung window and mediastinal window. Then the imaging qualities were subjectively evaluated according to image clarity, degree of motion artifacts, sharpness of structural edges and overall quality. The indexes of objective evaluation of imaging quality included the mean CT values of unit density pixel within ROI on lung window and mediastinal window, the standard deviation of CT values (SDCT) representing image noise, as well as signal-to-noise ratio (SNR). Sobel operator edge detection was performed on images, recording the mean gray level (G) and the standard deviation of gray value in Sobel (SDSobel) within ROI. Comparisons were made between FULL reconstruction and corrected images with APMC reconstruction in terms of subjective and objective evaluations, as well as parameters obtained from Sobel output images. Results Compared to FULL reconstruction, APMC corrected images showed reduced motion artifacts, improved edge structure sharpness and enhanced overall image quality (all P＜0.05), while there was no significant difference of image clarity (P＞0.05). Meanwhile, with APMC reconstructions, the mean CT values, SDCT on lung window and SDCT on mediastinal window increased (all P＜0.05), but there was no significant difference for the mean CT values on mediastinal window (P＞0.05), and SNR on both lung window and mediastinal window decreased (both P＜0.05). Besides, for Sobel output images, compared to FULL reconstruction, APMC reconstruction had increased G and SDSobel on both lung window and mediastinal window (all P＜0.05). Conclusion APMC technology applicated in low-dose chest CT scan of children could effectively reduce motion artifacts, improve edge clarity and imaging quality, hence enhance diagnostic sensitivity. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
