Target-driven acquisition and super-resolution reconstruction for magnetic resonance imaging

Area of Science:

• Medical Physics
• Radiology
• Biomedical Imaging

Background:

• Real-time MRI guidance is crucial for abdominal and thoracic radiation therapy.
• Current 2D MRI limits volumetric tracking, losing positional data during treatment pauses.

Purpose of the Study:

• To develop a novel 2D multislice MRI encoding scheme for improved target localization.
• To enable high-detail 3D volume reconstruction for enhanced safety assurance during radiation therapy.

Main Methods:

• A novel 2D multislice MRI encoding strategy was developed, ensuring slices intersect the treatment target.
• Combined parallel imaging and super-resolution reconstruction techniques were employed.
• The framework was validated using phantom and in vivo experiments at 3 Tesla.

Main Results:

• The proposed method successfully captures target position for safety assurance.
• High-detail 3D volumes near the target and lower-detail volumes further away were reconstructed.
• Demonstrated feasibility in both phantom and in vivo settings.

Conclusions:

• The novel MRI encoding and reconstruction framework enhances real-time target localization during radiation therapy.
• This approach offers improved safety assurance by providing volumetric positional information.
• The method shows promise for advanced image-guided radiation therapy applications.