Ultrahigh-Field 7-T MRI in Neuroradiology: A Comprehensive Clinical Review

Area of Science:

• Radiology and Medical Imaging
• Neuroscience
• Biomedical Engineering

Background:

• Ultrahigh-field 7-Tesla (7-T) MRI systems are increasingly adopted clinically due to regulatory approvals.
• 7-T MRI provides significant improvements in signal-to-noise ratio, tissue contrast, and susceptibility effects, enabling higher image resolution.
• Despite advantages, technical challenges have historically limited widespread clinical implementation.

Purpose of the Study:

• To review technical advancements enabling routine 7-T MRI clinical use.
• To highlight 7-T MRI applications in various neurologic disorders.
• To discuss the impact of innovations like dynamic parallel transmission and deep learning on clinical translation.

Main Methods:

• Review of physical principles of 7-T imaging (susceptibility, chemical shift).
• Analysis of technical innovations (dynamic parallel transmission, deep-learning reconstructions).
• Examination of clinical applications across diverse neurologic conditions.

Main Results:

• 7-T MRI demonstrates superior lesion detection, enhanced anatomic delineation, and increased diagnostic specificity compared to lower field strengths.
• Applications reviewed include epilepsy, multiple sclerosis, pituitary microadenomas, aneurysms, cerebrovascular disease, brain tumors, and neurodegenerative diseases.
• Innovations mitigate technical barriers, facilitating clinical translation.

Conclusions:

• 7-T MRI offers enhanced diagnostic capabilities for a wide range of neurologic conditions.
• Technical advancements are crucial for overcoming implementation challenges.
• 7-T MRI is set to become increasingly pivotal in clinical neuroradiology for diagnosis and treatment planning.