波谱学杂志Issue(4)：515-522,8.
利用动态接收增益提高磁共振成像信噪比的方法
Improving Signal-to-Noise Ratio in Magnetic Resonance Imaging Using Dynamic Receiver Gain
摘要
Abstract
A method to increase signal-to-noise ratio (SNR) in magnetic resonance imaging using dynamic receiver gain was proposed. In the method, the receiver gain was adjusted dynamically according to amplitude of each echo signal before acquisition. By doing so, the receiver dynamic range could be optimized to improve SNR of each acquisition. To reconstruct the images, a double-precision floating-point arithmetic processing procedure was used to expand the dynamic range of all acquisitions to the same scale. Imaging experiments were conducted using the proposed method on a 1.5 T clinical MRI scanner. The results showed that the SNR of T1-weighted images could be improved by approximately 10%, compared to the fixed-receiver-gain images. More importantly, the method proposed needs no extra circuits or multiple time-consuming scans. It is concluded that using dynamic receiver gain for each acquisition is an effective way to improve SNR in MR imaging, especially for high-resolution and high-filed imaging applications.关键词
磁共振成像(MRI)/动态接收增益/量化噪声/动态范围/信噪比Key words
MRI/dynamic receiver gain/quantization noise/dynamic range/signal-to-noise ratio分类
数理科学引用本文复制引用
孙宏宇,汤伟男,王为民..利用动态接收增益提高磁共振成像信噪比的方法[J].波谱学杂志,2014,(4):515-522,8.基金项目
国家科技重大专项资助项目(2011ZX05008-004) （2011ZX05008-004）
