Magnetic resonance imaging of hyaline cartilage defects at 1.5T and 3.0T:: comparison of medium T2-weighted fast spin echo, T1-weighted two-dimensional and three-dimensional gradient echo pulse sequences
Magnetic resonance imaging of hyaline cartilage defects at 1.5T and 3.0T:: comparison of medium T2-weighted fast spin echo, T1-weighted two-dimensional and three-dimensional gradient echo pulse sequences
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DOI：
10.1080/02841850510012625
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发表时间：
2005-02-01
期刊：
影响因子：
1.3
通讯作者：
Schröder, RJ
中科院分区：
文献类型：
--
作者：
Fischbach, F;Bruhn, H;Schröder, RJ
目的：评估和比较适当的磁共振 (MR) 序列在 1.5T 和 3.0T 下检测软骨病变的诊断准确性。 材料和方法：在 6 个绵羊尸体四肢的髌后透明软骨中产生不同深度、宽度和位置的 12 个软骨缺损。轴向图像采用三个脂肪抑制成像序列 - (1) T2 加权快速自旋回波 (FSE) 序列，(2) 二维 (213) 和 (3) 三维 (313) 梯度回波 (GE) 序列，使用四肢正交线圈在 1.5T 和 3.0T 下进行评估 - 由三位经验丰富的放射科医生进行评估。结果的统计分析包括接受者操作特征 (ROC) 和使用双变量卡方检验的显着性检验。此外，还使用 Wilcoxon 检验通过显着性检验来评估信噪比 (SNR) 和对比噪声比 (CNR)。 结果：3D GE 序列在 3.0T 和 1.5T 下与其他序列相比具有优势（3.0T 时 Az=0.88，1.5T 时 Az=0.85）仅缺失一个小的 2 级病变。 2D GE 成像在两个场强上均不如 3D 成像 (P
Purpose: To evaluate and compare the diagnostic accuracy of appropriate magnetic resonance (MR) sequences in the detection of cartilage lesions at 1.5T and 3.0T.Material and Methods: Twelve chondral defects of varying depths, widths, and locations were created in the retropatellar hyaline cartilage in six sheep cadaver limbs. Axial images employing three fat-suppressed imaging sequences - (1) a T2-weighted fast spin-echo (FSE) sequence, (2) a two-dimensional (213) and (3) three-dimensional (313) gradient-echo (GE) sequence at 1.5T and 3.0T using an extremity quadrature coil - were evaluated by three experienced radiologists. Statistical analysis of the results consisted of receiver operating characteristics (ROC) and significant testing using the bivariate chi-square test. In addition, signal-to-noise ratios (SNR) and contrast-to-noise ratios (CNR) were evaluated with significance testing using the Wilcoxon test.Results: The 3D GE sequence compared favorably with other sequences at 3.0T and 1.5T (Az=0.88 at 3.0T and Az=0.85 at 1.5T) missing only one small grade 2 lesion. 2D GE imaging was inferior to 3D imaging at both field strengths (P