Latest Advances in Image Acceleration: All Dimensions are Fair Game

Area of Science:

• Medical Imaging
• Biophysics
• Radiology

Background:

• Magnetic resonance imaging (MRI) provides high-resolution images but suffers from long acquisition times, especially for advanced applications.
• Increased temporal/spatial resolution, multiple contrasts, and large volumetric coverage exacerbate scan duration.
• Accelerating MRI acquisition is crucial for improving patient comfort and enabling novel clinical applications.

Purpose of the Study:

• To review magnetic resonance imaging (MRI) acquisition and reconstruction methods for accelerating image data acquisition.
• To focus on techniques exploiting redundancies in temporal, spatial, and contrast/parametric dimensions.
• To discuss applications in cardiac and abdominal MRI, and future directions.

Main Methods:

• Review of existing literature on MR acquisition and reconstruction techniques.
• Categorization of acceleration methods based on exploited dimensions: temporal, spatial, and contrast/parametric.
• Discussion of combined multidimensional acceleration strategies.

Main Results:

• Various methods exploit temporal, spatial, and contrast/parametric redundancies to undersample MR data.
• Separate exploitation of each dimension has led to significant acceleration.
• Combined multidimensional approaches offer further potential for scan time reduction.

Conclusions:

• Exploiting multidimensional redundancies is key to accelerating MRI acquisition.
• Cardiac and abdominal MRI applications benefit significantly from these acceleration techniques.
• Further research into advanced multidimensional acceleration and addressing technical challenges is warranted.