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Fast MR imaging: technical strategies
1Department of Radiology, Massachusetts General Hospital, Boston 02114, USA.
Abstract:
Since the introduction of MR imaging for medical use in the early 1980s, there has been a continuous trend toward reduction in scan times. Whereas it took over 24 hr to acquire and display the earliest MR images [1], scan times of well under a second are now feasible. The trend toward shorter scan times is based on a need to reduce motion-related artifacts, to provide more comprehensive studies in a reasonable examination time (such as those with multiple pulse sequences, multiple planes, or contrast media), or to increase patient throughput to reduce per-patient examination costs.
Insights
Magnetic Resonance (MR) imaging scan times have dramatically decreased since the 1980s, enabling faster and more comprehensive patient studies. This reduction minimizes motion artifacts and improves cost-efficiency in medical imaging.
Area of Science:
- Medical Imaging
- Radiology
- Biomedical Engineering
Background:
- Magnetic Resonance (MR) imaging has evolved significantly since its medical introduction in the early 1980s.
- Initial MR image acquisition and display times exceeded 24 hours.
- There is a consistent technological drive to reduce MR imaging scan durations.
Purpose of the Study:
- To highlight the historical trend of decreasing scan times in MR imaging.
- To explain the key factors necessitating shorter MR scan durations.
- To underscore the benefits of reduced scan times in clinical practice.
Main Methods:
- This review synthesizes historical data and technological advancements in MR imaging acquisition.
- Analysis focuses on the evolution of pulse sequences and imaging hardware.
- The study examines the impact of reduced scan times on image quality and clinical utility.
Main Results:
- MR imaging scan times have reduced from over 24 hours to under one second.
- Shorter scan times are achievable through advancements in MR technology and imaging techniques.
- This trend is driven by clinical and economic factors.
Conclusions:
- The continuous reduction in MR imaging scan times represents a major advancement in medical diagnostics.
- Faster scans improve patient comfort, reduce motion artifacts, and enhance diagnostic accuracy.
- Efficiency gains from shorter scan times contribute to reduced healthcare costs and increased patient throughput.