摘要: |
目的 比较ACS和BLADE序列在上腹部T2WI中的应用价值。方法 对61例患者分别行上腹部BLADE-T2-FSE序列和ACS-T2-FSE序列扫描。由两位医师分别对两组图像中呼吸运动伪影、卷褶伪影、胃肠道蠕动伪影、图像错层情况、胆管和病灶显示清晰度、整体图像质量进行评分;测量并计算两组序列中病灶与肝实质信号强度对比率(contrast ratio,CR),并进行统计学分析。结果 ACS序列检查时间为10 s,BLADE序列检查时间约62 s。61例患者共检出75个病灶,其中肝细胞肝癌36个、胆管细胞癌6个、肝血管瘤16个、肝囊肿17个。ACS-T2-FSE序列图像中各类病灶与肝实质信号的CR均高于BLADE-T2-FSE序列(P<0.001)。两位医师对图像评分一致性良好,ACS-T2-FSE序列图像中呼吸运动伪影、卷褶伪影、图像错层情况、胆管和病灶显示清晰度与整体图像质量评分均高于BLADE-T2-FSE序列(P<0.05);ACS-T2-FSE序列图像中胃肠道蠕动伪影评分略低于BLADE-T2-FSE序列,但差异无统计学意义(P=0.128)。结论 与BLADE-T2-FSE序列相比,ACS技术能大幅缩短扫描时间,减少呼吸运动伪影和图像错层,提高图像质量,值得推广。 |
关键词: 磁共振成像 肝脏 上腹部 ACS BLADE T2WI |
DOI:10.12025/j.issn.1008-6358.2022.20211448 |
分类号:R445.2 |
基金项目:中华国际医学交流基金会基金,2020SKY影像科研基金(Z-2014-07-2003-04). |
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Comparison of ACS and BLADE T2WI sequences in upper abdomen study |
XU Hang1,2, DU Fan1,2, WEN Xi-xi3, CHEN Cai-zhong1,2, RAO Sheng-xiang1,2, SUN Wei1,2
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1.Department of Diagnostic Radiology, Zhongshan Hospital, Fudan University;2.Shanghai Institute of Medical Imaging, Shanghai 200032, China;3.Shanghai United Imaging Healthcare Co. Ltd, Shanghai 201807, China
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Abstract: |
Objective To compare the application value of AI-assisted compressed sensing (ACS)-T2-weighted fast spin-echo (FSE) sequence and BLADE (proprietary name for periodically rotated overlapping parallel lines with enhanced reconstruction in MR systems from Siemens Healthcare)-T2-weighted FSE sequence in upper abdomen. Methods A total of 61 patients underwent MRI examinations using BLADE-T2-FSE and ACS-T2-FSE sequences. Images quality were qualitatively evaluated by two radiologists regarding respiratory motion artifacts, alias artifacts, gastrointestinal motion artifacts, image interlacing, depiction of bile duct and lesions, and overall image quality. The contrast ratio (CR) of lesion and liver parenchyma in the two groups were calculated and statistically analyzed. Results The examination time was 10 seconds using ACS sequence, while it was about 62 seconds using BLADE.75 lesions were detected among 61 patients, including 36 cases of hepatocellular carcinoma, 6 cases of cholangiocarcinoma, 16 cases of hepatic hemangioma, and 17 cases of liver cyst. The CR of various lesions and liver parenchyma in image of ACS-T2-FSE sequence were higher than that in BLADE-T2-FSE sequence (P<0.001). The agreement between two radiologists was consistent. Scores of respiratory motion artifacts, alias artifacts, image interlacing, depiction of bile duct and lesions, overall image quality of ACS-T2-FSE sequence were higher than those of BLADE-T2-FSE sequence (P<0.05); the gastrointestinal motion artifact score of ACS-T2-FSE sequence was slightly lower than that of BLADE-T2-FSE sequence, but there was no statistically significant difference (P=0.128). Conclusion Compared with BLADE-T2-FSE sequence, ACS technology can greatly shorten the scanning time, reduce respiratory motion artifacts and image interlacing, totally improve the quality of image diagnosis, which is worthy of promotion. |
Key words: magnetic resonance imaging liver upper abdomen ACS BLADE T2WI |