【摘要】 目的:探讨不同的联合线圈单元开放方法在3.0T MRI胸椎扫描中对图像质量的影响,筛选最佳扫描方案。方法:应用3.0T MR机联合线圈(NV线圈及SPINE线圈)对20例患者行胸椎扫描,分别获得不同线圈单元开放的T1WI压脂增强(SPIR)序列图像,测量图像的信噪比(SNR)及对比度噪声(CNR),比较其图像质量是否存在差异。结果:20例中使用NV线圈开放NPC单元结合SPINE线圈开放ABC单元(即NPC-ABC,A组)图像的SNR-Ⅰ(上段胸椎)及CNR-Ⅰ均高于使用NV线圈开放PC单元结合SPINE线圈开放ABCD单元(即PC-ABCD,B组),SNR-Ⅰ分别为70.11±5.38和16.37±4.76(P<0.05),CNR-Ⅰ分别为15.11±4.62和7.90±4.48,两组间差异有统计学意义(P<0.05);而NPC-ABC与PC-ABCD的SNR-Ⅱ(即中段胸椎)及NPC-ABC与PC-ABCD的SNR-Ⅲ(即下段胸椎)间差异均无统计学意义。A组序列上段胸椎图像的主观评分为3.6±0.4,B组为2.7±0.5。结论:使用NV线圈开放NPC单元结合SPINE线圈开放ABC单元得出的上段胸椎图像质量最好,可作为常规扫描方案。更多还原

【Abstract】 Objective:To discuss the influence of the dual coil elements’ opening on the quality of the images in 3.0T MR thoracic scan,in order to choose the best scanning program.Methods:Thoracic scan was performed in 20 patients with 3.0T MR scanner(Philips Intera Achieva) and dual coil(NV coil & SPINE coil),T1WI SPIR+C sequence images of different dual coil elements were obtained respectively,their different SNR and CNR were measured and compared to observe the difference of their image quality.Results:Of all 20 patients,on NV coil opening elements NPC and using sense spine coil opening elements ABC(NPC-ABC,group A),the SNRⅠ and CNRⅠboth were higher than those by using NV coil opening elements PC and using sense spine coil opening elements ABCD(PC-ABCD,group B),SNRⅠwas 70.11±5.38 and 16.37±4.76(P<0.05) respectively,CNRⅠwas 15.11±4.62 and 7.90±4.48 respectively,there was significant diffe-rence(P<0.05).There were no significant differences between the SNRⅡ,CNR Ⅱ of NPC-ABC,PC-ABCD and SNRⅢ,CNRⅢ(P>0.05).The subjective scoring of upper thoracic imaging in group A was 3.6±0.4 and in group B was 2.7±0.5.Conclusion:The quality of upper thoracic imaging by using NV coil opening elements NPC and sense spine coil opening elements ABC was better,which can be used as a routine scanning program.更多还原