Phase-sensitive inversion recovery (PSIR) single-shot TrueFISP for assessment of myocardial infarction at 3 tesla
Phase-sensitive inversion recovery (PSIR) single-shot TrueFISP for assessment of myocardial infarction at 3 tesla
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DOI：
10.1097/01.rli.0000195843.97582.f4
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发表时间：
2006-02-01
影响因子：
6.7
通讯作者：
Schoenberg, SO
中科院分区：
文献类型：
--
作者：
Huber, A;Bauner, K;Schoenberg, SO
目的：本研究的目的是显示如果在3.0 T而不是1.5 T下使用相敏反转恢复（PSIR）单次激发TrueFISP序列，是否可以在不损失诊断准确性的情况下提高对比度噪声比（CNR）。材料和方法：10例心肌梗死患者分别在1.5T磁共振（MR）系统（Avanto，Siemens Medical Systems）和3.0T MR系统上进行了检查。在应用造影剂后10分钟开始成像延迟对比增强。在1.5和3.0 T下使用相敏反转恢复（PSIR）单次激发TrueFISP序列，并与1.5 T下的分段IR turboFLASH序列（作为参考方法）进行比较。梗死和正常心肌的容积和CNR与参考方法进行了比较。结果：PSIR单次激发TrueFISP技术允许在单次屏气期间成像9个切片，而无需调整反转时间。1.5T和3.0T时心肌梗死和正常心肌的CNR平均值分别为5.9和12.2。参考方法的CNR平均值为8.4。3.0 T时的CNR平均值显著（P = 0.03）高于参考方法的平均值。PSIR单次激发TrueFISP技术在1.5 T和3.0 T下测定的梗死体积与参考方法相比的相关系数分别为r = 0.96（P = 0.001）和r = 0.99（P = 0.0001）。结论：使用PSIR单次激发TrueFISP技术在3.0 T下可以准确检测和评估心肌梗死。与1.5T相比，3.0T下的C R显著更高。PSIR单次激发技术在3.0 T下的CNR高于分段参考技术在1.5 T下的CNR。
Purpose: The aim of the current study was to show if contrast-to-noise ratio (CNR) could be improved without loss of diagnostic accuracy if a phase-sensitive inversion recovery (PSIR) single-shot TrueFISP sequence is used at 3.0 T instead of 1.5 T.Material and Methods: Ten patients with myocardial infarction were examined on a 1.5 T magnetic resonance (MR) system (Avanto, Siemens Medical Systems) and at a 3.0 T MR system. Imaging delayed contrast enhancement was started 10 minutes after application of contrast material. A phase-sensitive inversion recovery (PSIR) single-shot TrueFISP sequence was used at 1.5 and 3.0 T and compared with a segmented IR turboFLASH sequence at 1.5 T, which served as the reference method. Infarct volumes and CNR of infarction and normal myocardium were compared with the reference method.Results: The PSIR Single-Shot TrueFISP technique allows for imaging nine slices during a single breathhold without adaptation of the inversion time. The mean value of CNR between infarction and normal myocardium was 5.9 at 1.5 T and 12.2 at 3.0 T (magnitude images). The CNR mean value of the reference method was 8.4. The CNR mean value at 3.0 T was significantly (P = 0.03) higher than the mean value of the reference method. The correlation coefficients of the infarct volumes, determined with the PSIR single-shot TrueFISP technique at 1.5 T and at 3.0 T and compared with the reference method, were r = 0.96 (P = 0.001) and r = 0.99 (P = 0.0001).Conclusion: The use of PSIR single-shot TrueFISP at 3.0 T allows for accurate detection and assessment of myocardial infarction. C R is significantly higher at 3.0 T compared with 1.5 T. The PSIR single-shot technique at 3.0 T provides a higher CNR than the segmented reference technique at 1.5 T.