Flour pads: devices to improve CHESS fat suppression

Area of Science:

• Medical Imaging
• Magnetic Resonance Imaging (MRI)
• Biomedical Engineering

Background:

• Lingering fat signals can obscure anatomical details in MRI scans.
• Effective fat suppression is crucial for accurate diagnosis.
• Chemical shift selective (CHESS) imaging is a common technique for fat suppression.

Purpose of the Study:

• To compare the efficacy of flour pads versus rice pads in suppressing lingering fat signals in CHESS images.
• To evaluate fat signal suppression in both phantom and human subjects.

Main Methods:

• A phantom study using lard with air, rice, or flour in an empty space was conducted.
• MR images were acquired from phantoms at center and off-center positions.
• Knee MR images were obtained from 10 healthy volunteers using CHESS with sponge, rice, or flour pads placed in the popliteal space.

Main Results:

• Both rice and flour pads significantly reduced lingering fat signals compared to a sponge pillow in volunteer studies (P < 0.001).
• Flour pads demonstrated comparable fat signal suppression to rice pads (P = 0.662).
• Similar fat signal suppression effects were observed in both phantom and off-center imaging.

Conclusions:

• Flour pads are an effective and accessible material for suppressing lingering fat signals in CHESS MRI.
• The findings suggest flour pads can be a viable alternative to traditional methods for improving image quality.