ULTRAHIGH FIELD and ULTRAHIGH RESOLUTION fMRI.

Area of Science:

• Neuroimaging
• Magnetic Resonance Imaging

Background:

• Functional magnetic resonance imaging (fMRI) is a key tool for brain investigation.
• Ultrahigh magnetic field (UHF) 7 Tesla MRI enhances functional map resolution and accuracy.
• Current fMRI spatial resolution limits the understanding of brain function organization.

Purpose of the Study:

• To highlight the need for advancements in fMRI technology.
• To identify future directions for improving fMRI capabilities.
• To discuss the role of higher magnetic fields and complementary technologies.

Main Methods:

• Review of current ultrahigh magnetic field (UHF) fMRI capabilities.
• Discussion of limitations in spatial resolution for brain function studies.
• Exploration of technological advancements needed for future fMRI.

Main Results:

• 7 Tesla UHF fMRI provides higher resolution and accuracy compared to lower fields.
• Significant challenges remain in matching fMRI spatial scale to brain organization.
• Higher magnetic fields (>7 Tesla) are crucial for future fMRI gains.

Conclusions:

• Further progress in fMRI necessitates magnetic fields significantly exceeding 7 Tesla.
• Development in pulse sequences, image reconstruction, noise suppression, and analysis is essential.
• Technological innovation is key to augmenting gains from higher magnetic fields for brain imaging.