Multishot PROPELLER for high-field preclinical MRI.

Area of Science:

• Medical imaging
• Oncology research
• Magnetic Resonance Imaging (MRI)

Background:

• Advancements in cancer research necessitate sophisticated imaging techniques for studying disease progression in mouse models.
• Current imaging methods may lack the resolution, speed, or robustness required for longitudinal studies in small animals.

Purpose of the Study:

• To introduce and evaluate a novel two-shot PROPELLER MRI sequence for high-field imaging in mouse models.
• To demonstrate the capability of this technique for noninvasive, high-throughput, and longitudinal studies of cancer evolution.

Main Methods:

• Implementation of a two-shot PROPELLER MRI sequence at high magnetic field strengths.
• Utilizing unique data acquisition and reconstruction strategies to minimize motion artifacts.
• Assessing image quality based on spatial resolution, contrast resolution, and signal-to-noise ratio.

Main Results:

• The two-shot PROPELLER technique achieved high spatial and contrast resolution.
• The method proved robust against motion artifacts, crucial for free-breathing mice.
• Compared to single-shot PROPELLER, the two-shot modification enhanced signal-to-noise ratio and retained high-frequency information.

Conclusions:

• The developed two-shot PROPELLER MRI is a feasible and effective imaging solution for cancer mouse models.
• Its noninvasive nature and robustness enable high-throughput, longitudinal studies, particularly in challenging abdominal regions.
• This technique advances the study of cancer evolution in preclinical research.