Toward accessible MRI: SDR4MR, a simple RF pulse monitoring technique using an inexpensive software-defined radio.

IF 2 4区医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Magnetic Resonance Materials in Physics, Biology and Medicine Pub Date : 2025-04-19 DOI:10.1007/s10334-025-01249-z

Kouame Ferdinand Kouakou, Anita Paisant, Christophe Aube, Hervé Saint-Jalmes

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引用次数: 0

Abstract

Objective: This study evaluated the applicability and performance of the SDR4MR method at 1.5 T and 3 T across different acquisition scenarios in a clinical environment.

Materials and methods: The SDR4MR hardware consists of a broadband receiver coil connected to a software-defined radio (SDR) via optional RF attenuators. The SDR stick is plugged into the computer's USB port, which runs the SDR software and a Mathematica script to decode the RF pulse sequence. Several MRI pulse sequences were recorded: (i) a multi-echo multi-slice spin echo sequence to check the SDR4MR configuration on a well-known simple sequence; (ii) 2D and 3D sequences for which detailed information is not available in the user interface.

Results: The measured RF pulse sequences have been drawn in the style of illustrations found in MRI textbooks. Sequence times and amplitudes were estimated, and sequence details not described in the MRI user interface were retrieved.

Conclusion: The present study demonstrated the implementation of SDR4MR on clinical scanners. This easy-to-use configuration enables precise monitoring of RF pulse sequences. This method could be further improved by taking advantage of advances in SDR hardware and software.

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走向可访问的MRI: SDR4MR，一种简单的射频脉冲监测技术，使用廉价的软件定义无线电。

目的：本研究评估了SDR4MR方法在临床环境中1.5 T和3 T不同采集场景下的适用性和性能。材料和方法：SDR4MR硬件包括一个宽带接收器线圈，通过可选的射频衰减器连接到软件定义无线电（SDR）。SDR棒插入计算机的USB端口，该端口运行SDR软件和Mathematica脚本来解码RF脉冲序列。记录几个MRI脉冲序列：(i)一个多回波多层自旋回波序列，在一个众所周知的简单序列上检查SDR4MR结构；（ii）在用户界面中无法获得详细信息的2D和3D序列。结果：测量的射频脉冲序列以MRI教科书中的插图风格绘制。估计序列时间和振幅，检索MRI用户界面中未描述的序列细节。结论：本研究证明了SDR4MR在临床扫描仪上的应用。这种易于使用的配置可以精确监测射频脉冲序列。利用SDR硬件和软件的进步，可以进一步改进该方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Magnetic Resonance Materials in Physics, Biology and Medicine 医学-核医学

CiteScore

4.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： MAGMA is a multidisciplinary international journal devoted to the publication of articles on all aspects of magnetic resonance techniques and their applications in medicine and biology. MAGMA currently publishes research papers, reviews, letters to the editor, and commentaries, six times a year. The subject areas covered by MAGMA include: advances in materials, hardware and software in magnetic resonance technology, new developments and results in research and practical applications of magnetic resonance imaging and spectroscopy related to biology and medicine, study of animal models and intact cells using magnetic resonance, reports of clinical trials on humans and clinical validation of magnetic resonance protocols.