Abstract: Objective To investigate the application value of Tim technique in the optimized scanning scheme of whole abdomen MRI in tumor patients. Methods The Siemens 3.0 MRI （Siemens Skyra 3.0T） was used to carry out contrast-enhanced MRI scan of the whole abdomen in 132 patients clinically diagnosed with tumors. The Tim technology was applied to the optimized scanning scheme of the whole abdomen in 78 patients and the traditional segmental scanning scheme of the whole abdomen in 54 patients. The optimized scanning scheme of the whole abdomen based on Tim technology adopts Tim coil, automatic bed shifting and seamless connection technology. Traditional segmental scanning scheme adopts abdominal and pelvic segmental scanning scheme. The the completion time of two different scanning schemes and the image quality obtained by scanning were compared and discussed. Results The average inspection time of the optimized all-abdominal scanning scheme based on Tim technology was （37.9±6.0）min and the image quality excellence rate was 97.4%. The average inspection time of the traditional segmental scanning scheme was （47.2±3.3）min and the image quality excellence rate was 96.2%. The examination time of the Tim technique is significantly shorter than that of the traditional segmental scanning scheme （P<0.01）, and the visual and clear continuous and complete images of the whole abdominal organs, retroperitoneal vessels and abdominal vessels can be obtained. Conclusion The optimized scanning scheme of the whole abdomen based on Tim technology can comprehensively, intuitively and clearly display the structure of abdominal and pelvic organs, and the concise and integrated images can reduce the working intensity of doctors who read the images, which is more suitable for the preoperative and postoperative evaluation of huge lesions and multiple lesions in the abdominal cavity.

Key words: MRI, abdomen, full-matrix imaging

摘要： 目的 探讨基于全景成像矩阵技术（Tim技术）的全腹部MRI优化扫描方案在恶性肿瘤患者中的应用价值。方法 使用西门子3.0磁共振成像仪对132例临床诊断恶性肿瘤的患者进行全腹部MRI增强扫描检查,其中78例患者应用基于Tim技术的全腹部优化扫描方案,54例患者应用传统的全腹部分段扫描方案。基于Tim技术的全腹部优化扫描方案采用Tim线圈、自动移床和无缝连接技术,传统分段扫描采用腹部和盆腔分段扫描方案,分别记录两种扫描方案整体扫描时间,评估两种扫描方案所获得的图像质量。对比两种不同扫描方案的检查时间和扫描获取的图像质量。结果 基于Tim技术的全腹部优化扫描方案平均检查时间为（37.9±6.0）min,图像质量优秀率为97.4%,传统分段扫描方案的平均检查时间为（47.2±3.3）min,图像质量优秀率为96.2%。前者检查时间明显短于传统的分段扫描方案（P<0.01）,且可获得直观、清晰的全腹部脏器、腹膜后及腹部血管连续、完整的图像。结论 基于Tim技术的全腹部优化扫描方案可快速、全面的清晰显示腹、盆腔内脏器结构,简洁一体化的图像有利于减轻阅片医生的工作强度,更加适用于腹腔内巨大病变及多发病变术前和术后的评估。

关键词: 磁共振成像, 腹部, Tim技术