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Related Concept Videos

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.

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Related Experiment Video

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Blood Flow Imaging with Ultrafast Doppler
05:57

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

Imaging using pulses: a simple and fast (>100 kHz) solution.

C Udalagama1, A A Bettiol, F Watt

  • 1Centre for Ion Beam Applications (CIBA), Department of Physics, National University of Singapore, Singapore 117542, Singapore. phycnbu@nus.edu.sg

Journal of Microscopy
|June 10, 2010
PubMed
Summary
This summary is machine-generated.

Researchers developed a cost-effective imaging algorithm for spectroscopy systems. This method uses a standard data acquisition card to achieve high-resolution imaging at high signal rates, simplifying complex setups.

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Area of Science:

  • Spectroscopy
  • Scientific Imaging
  • Data Acquisition

Background:

  • High-performance imaging is crucial for spectroscopy, often requiring specialized and expensive equipment.
  • Existing systems can be complex, with numerous dedicated electronic components.
  • Achieving high pixel resolution and high count-rates with minimal dead time is a key challenge.

Purpose of the Study:

  • To present a simple, cost-effective imaging algorithm for spectroscopic systems.
  • To enable high count-rate imaging using readily available hardware.
  • To integrate advanced imaging capabilities into spectroscopic setups without significant expense.

Main Methods:

  • Developed a novel imaging algorithm compatible with pulse (TTL) data signals.
  • Utilized a general-purpose National Instruments (NI) PXI/PCI-6259 data acquisition card.
  • Implemented a unique configuration of the card's buffered data collection feature to handle high signal rates.

Main Results:

  • Successfully processed signal rates exceeding 100 kHz.
  • Generated images with a pixel resolution of 512 x 512.
  • Demonstrated the system's ability to handle high count-rates efficiently.

Conclusions:

  • The developed algorithm provides a simple and affordable method for high count-rate imaging in spectroscopy.
  • This approach can enhance systems like scanning electron microscopes.
  • The imaging formalism is transferable to multiple computer platforms, including Linux and Mac OS.