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People tend to know what behavior is expected of them in specific, familiar settings. A script is a person’s knowledge about the sequence of events expected in a specific setting (Schank & Abelson, 1977). Essentially, scripts are a particular kind of schema, one containing default values for the features within an event. In the restaurant example, the script's features include the props (e.g., tables, menu, food, and money), the roles to be played (e.g., customer and waiter),...
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Spin-Scenario: A flexible scripting environment for realistic MR simulations.

Yan Chang1, Daxiu Wei2, Huihui Jia3

  • 1Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, 215163 Suzhou, China; University of Chinese Academy of Sciences, China.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|March 3, 2019
PubMed
Summary
This summary is machine-generated.

Spin-Scenario is a new open-source package for magnetic resonance (MR) imaging and spectroscopy simulations. It offers an intuitive scripting framework using the Liouville space model and parallel computing for efficient simulations.

Keywords:
Optimal controlPulse sequence programmingSpin dynamicsTensorFlowTime-frequency spectrogram

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Area of Science:

  • Magnetic Resonance (MR) Imaging and Spectroscopy

Background:

  • Simulations in MR imaging and spectroscopy require flexible and efficient frameworks.
  • Existing tools may lack intuitiveness or comprehensive scripting capabilities.

Purpose of the Study:

  • To introduce Spin-Scenario, a novel open-source package for MR simulations.
  • To provide an intuitive, flexible, and unique scripting framework for MR imaging and spectroscopy.

Main Methods:

  • Utilizes the Liouville space model as the core computational engine.
  • Employs parallel computing techniques to manage computational load.
  • Features a concise pulse sequence programming syntax based on the Lua scripting language.
  • Integrates a dataflow graph-based optimal control scheme for pulse optimization.

Main Results:

  • Demonstrates the framework's validation through various examples in MR imaging and spectroscopy.
  • Highlights the efficiency and conciseness of the scripting approach.
  • Confirms the framework's ability to facilitate creative simulation development.

Conclusions:

  • Spin-Scenario offers a powerful and user-friendly platform for MR simulation development.
  • The package enables efficient optimization of pulses and cooperative pulse sequences.
  • It empowers users to realize complex simulation scenarios with ease.