Related Experiment Video
Updated: Jul 13, 2026

13:31
High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
Published on: December 22, 2015
[Design of a digital spectrometer for the MRI system]
Cong Zhao1, Zheng-Min Liu, He-Qin Zhou
1Department of Automation, University of Science and Technology of China, Hefei.
Summary
This study details a novel digital Magnetic Resonance Imaging (MRI) spectrometer design using a PXI platform and custom software. The system integrates data acquisition and timing boards for comprehensive MRI spectrometer functionality.
Area of Science:
- Medical Imaging
- Spectroscopy
- Digital Systems Engineering
Context:
- Magnetic Resonance Imaging (MRI) systems rely heavily on sophisticated spectrometers for signal acquisition and processing.
- Traditional MRI spectrometer designs can be complex and expensive, driving the need for more integrated and cost-effective solutions.
- The PXI platform offers a modular and scalable architecture suitable for high-performance instrumentation.
Purpose:
- To present the design and implementation of a digital MRI spectrometer.
- To demonstrate the integration of data acquisition and timing functionalities on a PXI platform.
- To validate the spectrometer's performance through experimental results.
Summary:
- A novel digital MRI spectrometer was developed utilizing a PXI platform.
- The system incorporates specialized data acquisition and high-resolution timing boards.
- All spectrometer functions are controlled via custom-designed software, detailing its architecture and implementation.
- Experimental results are presented to showcase the system's capabilities.
Impact:
- This digital spectrometer design offers a potentially more flexible and efficient alternative for MRI systems.
- The software-driven approach allows for adaptability and potential cost reductions in MRI hardware.
- The findings contribute to advancements in medical imaging instrumentation and digital signal processing for MRI.
More Related Videos
Related Concept Videos
IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
NMR Spectrometers: Overview
NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
UV–Vis Spectrometers
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
NMR Spectrometers: Resolution and Error Correction
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...

