目的 探讨压缩感知(CS)技术在3D-MRCP成像中的临床应用价值。方法 回顾性分析2022年1-12月在江苏省淮安市第一人民医院接受MR胰胆管检查的120例患者,均完成3D-RT-MRCP与CS-3D-RT-MRCP序列扫描,根据呼吸频率将患者分为正常呼吸组及异常呼吸组,记录扫描时间;对呼吸运动伪影程度,根据所得图像质量及胰胆管显示情况进行评分,计算图像对比噪声比(CNR)和信噪比(SNR);比较两个序列的扫描时间、图像质量评分、CNR和SNR。结果 CS-3D-RT-MRCP扫描时间为(79.32±23.64)s,低于3D-RT-MRCP序列扫描时间(240.32±41.78)s,差异有统计学意义(P<0.05)。根据呼吸频率分为正常呼吸组81例,异常呼吸组39例;3D-RT-MRCP序列显示正常呼吸组图像伪影程度低于异常呼吸组,异常呼吸组患者的CS-3D-RT-MRCP序列图像伪影程度低于3D-RT-MRCP序列,差异有统计学意义(P<0.05);而两组的CS-3D-RT-MRCP序列图像伪影程度对比差异均无统计学意义。CS-3D-RT-MRCP的图像质量评分及SNR、CNR得分均高于3D-RT-MRCP图像,差异有统计学意义(P<0.05);异常呼吸组3D-RT-MRCP序列图像评分及SNR、CNR得分明显低于正常呼吸组,差异有统计学意义(P<0.05);但两组CS-3D-RT-MRCP图像质量评分情况及SNR、CNR得分,差异无统计学意义。结论 应用CS技术的3D-MRCP检查可缩短扫描时间,减少伪影,图像质量较好。
Abstract
Objective To investigate the clinical application value of CS-MRCP by comparing the image quality of conventional 3D-MRCP and 3D-MRCP with compressed sensing (CS) technique. Methods A retrospective analysis was performed on 120 patients who received MR cholangiopancreatography in the First People’s Hospital of Huai’an from January 2022 to December 2022. All patients underwent 3D-RT-MRCP and CS-3D-RT-MRCP sequence scanning. Thepatients were divided into even breathing group and uneven breathing group according to respiratory rhythm, and the scanning time was recorded. The degree of respiratory motion artifact was scored, and the image of CNR and SNR were calculated according to the quality of the obtained image and the display of the pancreatic duct. The scanning time, image quality score, CNR and SNR of the two sequences were compared. Results The scanning time of CS-3D-RT-MRCP sequence was (79.32±23.64)s, lower than (240.32±41.78)s of 3D-RT-MRCP sequence, and the difference was statistically significant (P<0.05). According to the respiratory rhythm, 81 cases were divided into even breathing group and 39 cases were divided into the uneven breathing group. 3D-RT-MRCP sequence showed that the degree of artifact in the even breathing group was lower than that in the uneven breathing group, and the artifact degree of CS-3D-RT-MRCP sequence images in the uneven breathing group was lower than that in the 3D-RT-MRCP sequence, thus the difference was statistically significant (P<0.05), while the artifact degree of CS-3D-RT-MRCP sequence image between the two groups and the artifact degree of patients in the even breathing rhythm group had no statistically significant difference. The image quality scores, SNR and CNR scores of CS-3D-RT-MRCP were higher than those of 3D-RT-MRCP images, and the differences were statistically significant (P<0.05). The 3D-RT-MRCP sequence image scores, SNR and CNR scores in the uneven breathing group were lower than those in the even breathing group, and the difference was statistically significant (P<0.05). There was no significant difference in CS-3D-RT-MRCP image quality score, SNR orCNR scores between uneven breathing group and even breathing group (P>0.05). Conclusions The application of CS technique in 3D-MRCP examination can significantly shorten the scanning time, reduce the artifactsand improve the image quality.
关键词
MR胰胆管成像 /
压缩感知技术 /
图像质量 /
磁共振
Key words
MR Cholangiopancreatography /
compressed sensing technique /
image quality /
magnetic resonance
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