Influence factors of fetal MRI imaging quality based on fast MRI sequences
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摘要:
目的探讨基于磁共振快速成像序列的胎儿图像质量的影响因素。 方法收集2017年1月~2018年1月在本院用产前超声筛选诊断或怀疑胎儿异常需要进行胎儿检查的中晚期妊娠孕妇50例。采用西门子1.5 T磁共振，对胎儿行快速多层多角度扫描技术，并对MRI图像进行质量评价，分析图像质量与孕周、胎位和羊水的关系，图像质量下降的原因。 结果选取的50例孕妇均能够成功完成检查，其中40例获得高对比度、高信噪比的图像，符合临床诊断要求。MRI成像质量与孕周、胎位和羊水量差异无统计学意义（P>0.05）。运动伪影、胎儿膀胱过度充盈、卷褶伪影可使图像质量降低。 结论在得出符合诊断要求MRI高质量图像的前提下，采用MRI快速扫描技术，其图像伪影少，信噪比和分辨率高，结果表明孕龄、胎儿位置和孕妇羊水量的差异与胎儿磁共振成像质量无关联性,表明高质量的磁共振快速成像技术在产前检查的重要性。 Abstract:ObjectiveTo explore the influence factors of fetal MRI imaging quality based on fast MRI sequences. MethodsFifty cases of fetus were collected during January 2017 to January 2018 in our hospital, who were undergone prenatal ultrasound screening or fetal abnormal suspected and needed further inspection in middle-late pregnancy pregnant women. The patients were scanned by SIEMENS 1.5 T magnetic resonance (NMR) with rapid multi-level multi-angle scanning technique. The MRI image quality was evaluated. The image quality was therefore analyzed to explore the connection with gestational age, position and amniotic fluid volume. The reason to the decline of the image quality were analyzed. ResultsAll the 50 pregnant women selected were able to undergo the examination successfully. Forty cases were able to obtain high contrast and high signal-to-noise ratio images, which met the clinical diagnostic requirements. There was no significant difference between the quality of MRI imaging and gestational age, fetal position or amniotic fluid volume (P>0.05). Motion artifacts, fetal bladder hyperplasia and pleated artifacts reduced the image quality. ConclusionIn the premise of high quality MRI images which meet the demand of diagnosis, rapid scanning technique can be applied. It has tiny image artifact, high signal to noise ratio and resolution. There is no relevance between the MRI quality and the gestational age, the fetal position or amniotic fluid volume. The high quality MRI imaging in prenatal examination is important. -
Key words:
- magnetic resonance imaging /
- fetus /
- image quality /
- scan sequence
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表 1 羊水量不同的图像质量的评价结果（n=50）
羊水量（标准） 优 良 差 总计 正常 24 6 2 32 过多 10 3 1 14 过少 1 3 0 4 Kruskal-Wallis Test，χ2=3.3195，P=0.1902. 
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[1] 中华人民共和国卫生部. 中国出生缺陷防治报告[EB/OL].[2013-06-05]. http://www.gov.cn/gzdt/att/att/site1/20120912/1c6f6506c7f811bacf9301.pdf. [2] 朱 铭, 董素贞. 磁共振成像对产前超声诊断的补充应用[J]. 中华医学超声杂志:电子版, 2015, 32(5): 348-50. [3] Frates MC, Kumar AJ, Benson CB, et al. Fetal anomalies: comparison of Mr imaging and US for diagnosis[J]. Radiology, 2004, 232(2): 398-404. doi: 10.1148/radiol.2322030504 [4] Rossi AC, Prefumo F. Additional value of fetal magnetic resonance imaging in the prenatal diagnosis of central nervous system anomalies: a systematic review of the literature[J]. Ultrasound Obstet Gynecol, 2014, 44(4): 388-93. doi: 10.1002/uog.2014.44.issue-4 [5] 胡立伟, 朱 铭, 曹厚德, 等. 磁共振快速采集技术在胎儿检查中的应用[J]. 生物医学工程学进展, 2013, 34(4): 221-5, 233. doi: 10.3969/j.issn.1674-1242.2013.04.005 [6] Levine D, Barnes PD, Edelman RR. Obstetric Mr imaging[J]. Radiology, 1999, 211(3): 609-17. doi: 10.1148/radiology.211.3.r99jn20609 [7] Yamashita Y, Namimoto T, Abe Y, et al. Mr imaging of the fetus by a HASTE sequence[J]. AJR Am J Roentgenol, 1997, 168(2): 513-9. doi: 10.2214/ajr.168.2.9016238 [8] Mccarthy SM, Filly RA, Stark DD, et al. Obstetrical magnetic resonance imaging: fetal anatomy[J]. Radiology, 1985, 154(2): 427-32. doi: 10.1148/radiology.154.2.3966129 [9] 赵连新, 王光彬. 磁共振成像技术在产前诊断中的应用价值[J]. 中国实用妇科与产科杂志, 2010, (12): 901-5. [10] 朱 铭, 董素贞. 胎儿磁共振在产前诊断中的应用及适应证[J]. 中国实用妇科与产科杂志, 2015, (9): 822-5. [11] 曹 伊. 磁共振不同成像序列在产前胎儿诊断成像质量的比较研究[J]. 西南国防医药, 2017, 27(1): 62-6. doi: 10.3969/j.issn.1004-0188.2017.01.023 [12] 王建伟, 王 敏, 张廉良, 等. SSFSE和FIESTA序列在胎儿MR成像中的对比研究[J]. 中国医疗设备, 2015, 30(12): 63-5. doi: 10.3969/j.issn.1674-1633.2015.12.017 [13] Chamberlain PF, Manning FA, Morrison I, et al. Ultrasound evaluation of amniotic fluid volume. I. The relationship of marginal and decreased amniotic fluid volumes to perinatal outcome[J]. Am J Obstet Gynecol, 1984, 150(3): 245-9. doi: 10.1016/S0002-9378(84)90359-4 [14] 杜 牧, 曹满瑞, 赵 弘, 等. 快速MRI对胎儿胼胝体发育不全的诊断价值及与超声对照研究[J]. 放射学实践, 2013, 28(8): 889-92. doi: 10.3969/j.issn.1000-0313.2013.08.021 [15] Chung HW, Chen CY, Zimmerman RA, et al. T2-weighted fast Mr imaging with true FISP versus HASTE[J]. AJOR, 2012, 175(5): 1375-80. [16] 刘 念, 黄小华, 董国礼, 等. 高场2D-SSFSE和3D-FRFSE序列胆胰管成像质量及显示程度的对比研究[J]. 中国医学计算机成像杂志, 2013, 19(6): 514-8. [17] Levine D, Barnes PD, Sher S, et al. Fetal fast Mr imaging: reproducibility, technical quality, and conspicuity of anatomy[J]. Radiology, 1998, 206(2): 549-54. doi: 10.1148/radiology.206.2.9457211 [18] 曹 乐, 刘 婷, 孙亲利, 等. 胎儿颅脑磁共振安全性与检查优化的探讨[J]. 西安交通大学学报:医学版, 2018, 39(2): 1-4. [19] 张晓凡, 郝明珠, 张 旭, 等. 胎儿颅脑磁共振检查优化及功能成像的临床研究[J]. 中国CT和MRI杂志, 2016, 14(6): 108-11. doi: 10.3969/j.issn.1672-5131.2016.06.035 [20] 胡军武, 王 伟, 孙子燕, 等. 胎儿磁共振成像序列的对比研究及应用[J]. 放射学实践, 2006, 21(6): 623-5. doi: 10.3969/j.issn.1000-0313.2006.06.027 [21] 黎 川, 蔡 萍, 王 新, 等. 单层厚块单次激发快速自旋回波重T_2加权序列胎儿成像质量分析[J]. 中国医药生物技术, 2009, 4(2): 109-13. doi: 10.3969/j.issn.1673-713X.2009.02.005 [22] 周嫦英, 徐志锋, 潘爱珍. 孕妇心理疏导及护理在胎儿磁共振检查中的价值[J]. 现代医药卫生, 2013, 29(21): 3303-5. doi: 10.3969/j.issn.1009-5519.2013.21.065 [23] 朱 铭. 胎儿磁共振——磁共振检查的新领域[J]. 磁共振成像, 2011, 2(1): 7-12. doi: 10.3969/j.issn.1674-8034.2011.01.004 [24] Wieseler KM, Bhargava P, Kanal KM, et al. Imaging in pregnant patients: examination appropriateness[J]. Radiographics, 2010, 30(5): 1215-33. doi: 10.1148/rg.305105034 [25] 张 弘, 朱 龙, 董素贞, 等. 羊水过少胎儿结构和相关畸形的MRI诊断价值[J]. 中国医学计算机成像杂志, 2011, 17(4): 361-4. doi: 10.3969/j.issn.1006-5741.2011.04.017 [26] 韩 瑞, 黄 璐, 夏黎明, 等. 胎儿颅脑扩散加权成像技术的初步探讨[J]. 放射学实践, 2013, 28(11): 1169-71. -
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