Validation of V-SS-PARSE for single-shot flow measurement

Area of Science:

• Magnetic Resonance Imaging
• Biomedical Engineering
• Signal Processing

Background:

• Flow quantification is crucial in various medical applications.
• Existing methods like phase-contrast MRI can be time-consuming.
• Need for faster, more straightforward flow assessment techniques.

Purpose of the Study:

• To introduce Velocity Single-Shot Parameter Assessment by Retrieval from Signal Encoding (VSS-PARSE).
• To demonstrate VSS-PARSE's capability for fast and accurate flow quantification.
• To validate the retrieval of multiple imaging parameters from a single acquisition.

Main Methods:

• Development of a novel single-shot imaging method based on VSS-PARSE.
• Implementation of a robust signal model accounting for local magnetization and phase evolution.
• Solving inverse problems to retrieve quantitative imaging parameters.
• Phantom studies to assess performance and compare with existing methods.

Main Results:

• VSS-PARSE successfully retrieves magnitude, velocity, relaxation rate, and frequency information.
• Achieved results comparable to phase-contrast methods for magnitude and velocity maps (r>.99).
• Demonstrated feasibility with a rapid 70-ms single-shot acquisition time.
• No additional reference image acquisitions were required.

Conclusions:

• VSS-PARSE offers a fast and straightforward approach to flow quantification.
• The method provides accurate quantitative imaging parameters in a single shot.
• VSS-PARSE holds potential for improving MRI-based flow assessment in clinical settings.