高密度二维接收器线圈阵列的应用,以改善前列腺MRI中的SNR
Stephen J Riederer1, Eric A Borisch1, Qingshuo Du2
1Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA.
Magnetic resonance in medicine
|September 25, 2024
概括
45%重叠的高密度自适应图像接收 (AIR) 阵列可以改善前列腺MRI中的信号噪声比 (SNR). 这种增强的SNR允许更快的成像,加快加速因子.
科学领域:
- 磁共振成像 (MRI) 是一种磁共振成像技术.
- 医学物理 医学物理
- 放射学 放射学是一门学科.
背景情况:
- 适应式图像接收 (AIR) 技术利用接收器线圈元素来增强MRI信号检测.
- 传统的AIR阵列通常具有有限的元素重叠 (20%),可能会影响更深处的信号噪声比 (SNR).
- 优化线圈元件配置对于改善MRI图像质量和采集速度至关重要.
研究的目的:
- 调查配置AIR接收器线圈元件到具有高元件对元件重叠 (>45%) 的2D阵列中的可行性.
- 为了评估这种高密度 (HD) 配置是否与传统的重叠阵列相比,在深度上改善了SNR.
- 评估改善的SNR对图像加速在T2加权的前列腺快速旋转回声 (T2SE) MRI中的影响.
主要方法:
- 构建新的前部 (4x5网格) 和后部 (3x7网格) HD阵列,其中45%的元素重叠.
- 使用高清和传统供应商的AIR阵列测量盆腔幻体中的SNR和g因子.
- 用HD和常规阵列对20名受试者采集的T2SEMRI图像进行比较,并对盲目放射科医生进行评估.
- 在各种加速度因子 (R=2.0-3.0) 的高清阵列与传统阵列的图像质量评估.
主要成果:
- 幻影SNR在R=1.0,1.5和2.0的高清阵列中高出15%.
- 在体内,前列腺SNR高11%,在放射学上被评估为明显改善 (p<0.001) 与HD阵列.
- 在所有测试的加速度因子 (p≤0.01) 中,高清阵列的性能始终优于常规阵列.
- 改进的SNR与高清阵列使得更高的加速度因子实现了可比的图像质量.
结论:
- 可以有效地将AIR元素配置为具有高元素重叠 (45%) 的2D数组.
- 这种高度重叠的配置与传统的重叠 (20%) 相比,在深度上始终产生更高的SNR.
- 证明的SNR改善促进了T2SE前列腺MRI的加速增加,可能减少扫描时间.
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