Free-breathing contrast-enhanced T1-weighted gradient-echo imaging with radial k-space sampling for paediatric abdominopelvic MRI
Free-breathing contrast-enhanced T1-weighted gradient-echo imaging with radial k-space sampling for paediatric abdominopelvic MRI
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DOI：
10.1007/s00330-013-3026-4
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发表时间：
2014-02-01
影响因子：
5.9
通讯作者：
Milla, Sarah S.
中科院分区：
文献类型：
--
作者：
Chandarana, Hersh;Block, Kai T.;Milla, Sarah S.
比较儿科患者对比增强腹部盆腔 3D 脂肪抑制 T1 加权梯度回波成像与径向和传统笛卡尔 k 空间采集方案的图像质量。73 名连续儿科患者使用顺序对比增强 T1 加权笛卡尔 (VIBE) 和径向梯度回波在 1.5 T 下进行成像 (GRE) 尽可能使用匹配参数的采集方案。笛卡尔 VIBE 是通过屏气或无法暂停呼吸的患者自由呼吸获得的，然后所有患者均获得自由呼吸径向 GRE。两名对采集方案不知情的儿科放射科医生以五分制的方式评估了图像质量的多个参数，得分越高表明检查效果越好。还评估了病变的存在或不存在、显着性和边缘清晰度。进行混合模型方差分析来比较径向 GRE 和笛卡尔 VIBE。径向 GRE 在整体图像质量、肝脏边缘清晰度、肝血管清晰度和呼吸运动稳健性方面的得分显着高于笛卡尔 VIBE（所有 P < 0.001）。与笛卡尔 VIBE 相比，两种读片器在径向 GRE 上检测到的病变更多，病变显着性和边缘锐度得分显着更高（全部 P < 0.001）。在接受对比增强腹盆腔 MRI 的儿科患者中，径向 GRE 比传统笛卡尔 VIBE 具有更好的图像质量和病变显着性。aEuro cent 需要多种技术来提供最佳 MR 图像 aEuro cent 径向自由呼吸对比增强采集显示出出色的图像质量。aEuro cent 径向采集的图像质量和病变明显性优于笛卡尔采集。aEuro cent 对比增强径向采集比笛卡尔采集检测到更多病变。aEuro cent 径向 GRE 可用于在儿科中执行腹盆腔 MRI 患者。
To compare the image quality of contrast-enhanced abdominopelvic 3D fat-suppressed T1-weighted gradient-echo imaging with radial and conventional Cartesian k-space acquisition schemes in paediatric patients.Seventy-three consecutive paediatric patients were imaged at 1.5 T with sequential contrast-enhanced T1-weighted Cartesian (VIBE) and radial gradient echo (GRE) acquisition schemes with matching parameters when possible. Cartesian VIBE was acquired as a breath-hold or as free breathing in patients who could not suspend respiration, followed by free-breathing radial GRE in all patients. Two paediatric radiologists blinded to the acquisition schemes evaluated multiple parameters of image quality on a five-point scale, with higher score indicating a more optimal examination. Lesion presence or absence, conspicuity and edge sharpness were also evaluated. Mixed-model analysis of variance was performed to compare radial GRE and Cartesian VIBE.Radial GRE had significantly (all P < 0.001) higher scores for overall image quality, hepatic edge sharpness, hepatic vessel clarity and respiratory motion robustness than Cartesian VIBE. More lesions were detected on radial GRE by both readers than on Cartesian VIBE, with significantly higher scores for lesion conspicuity and edge sharpness (all P < 0.001).Radial GRE has better image quality and lesion conspicuity than conventional Cartesian VIBE in paediatric patients undergoing contrast-enhanced abdominopelvic MRI.aEuro cent Numerous techniques are required to provide optimal MR images in paediatric patients.aEuro cent Radial free-breathing contrast-enhanced acquisition demonstrated excellent image quality.aEuro cent Image quality and lesion conspicuity were better with radial than Cartesian acquisition.aEuro cent More lesions were detected on contrast-enhanced radial than on Cartesian acquisition.aEuro cent Radial GRE can be used for performing abdominopelvic MRI in paediatric patients.