Design and Implementation of Data Acquisition System for Low Field MRI Systems

Akshay Kumar; Murigendrayya M. Hiremath

Abstract

A novel approach of using fully digital radiofrequency (RF) electronics for the design of dedicated Magnetic Resonance Imaging (MRI) systems at low-field (1 mT) is implemented and presented. This digital electronics is based on the use of three key elements: a Direct Digital Synthesizer (DDS) for RF signal generation, a Software Defined Radio (SDR) for digital receiving of MRI signals and a Digital Signal Processor (DSP) for system control and advanced signal processing. The signal generator was developed and implemented using FPGA SPARTAN 3 evaluation board. In addition, basic low pass filters were also designed. The underlying ideas were to enable such low field MRI systems to utilize from existing advanced technology in the telecommunication domain, making them easy to implement and cost effective

Keywords

RF electronics, Magnetic Resonance Imaging, Direct Digital Synthesizer, FPGA, Larmor frequency

Reference

[1] Aktham Asfour, Kosai Raoof and Jean-Paul Yonnet, ISSN 1424-8220, 2013. Software Defined Radio (SDR) and Direct Digital Synthesizer (DDS) for NMR/MRI Instruments at Low-Fields

[2] Aktham Asfour, A. Low-Field NMR/MRI Systems Using Labview and Advanced Data Acquisition Techniques, 2011

[3] Kuckreja Ajay, Ostrem Geir, High-Speed DACs ease transmitter designs, Microwave & RF, August 2010

[4] Ernst M, Freed ME, Zametkin AJ. Health hazards of radiation exposure in the context of brain imaging research: special consideration for children. J Nuclear Med 39: 689– 698,

Cites this article as

[Akshay Kumar , Murigendrayya M. Hiremath (2016), Design and Implementation of Data Acquisition System for Low Field MRI Systems, International Journal of Innovative Research in Engineering & Management (IJIREM), Vol-3, Issue-3, Page No-175-176], (ISSN 2347 - 5552). www.ijirem.org