[Examination of the thoracic duct using fast advanced spin echo]

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Medical Imaging Techniques
• Thoracic Anatomy

Context:

• Conventional MRI often requires contrast agents for visualizing thoracic duct.
• Fast advanced spin echo (FASE) is a technique typically used for MR-hydrography.
• Previous studies suggested FASE's potential for non-contrast imaging of vessels.

Purpose:

• To evaluate the efficacy of FASE technique for non-contrast thoracic duct depiction.
• To determine optimal imaging parameters, specifically effective echo time (TE) and fat suppression, for thoracic duct visualization.
• To compare imaging performance with and without fat suppression.

Summary:

• The study investigated thoracic duct imaging using 3D-FASE MRI without contrast agents.
• Contrast-to-noise ratios (CNR) were optimized by varying effective TE and fat suppression.
• The highest CNR for thoracic duct depiction was achieved with an effective TE of 500 msec in 3D-FASE without fat suppression.

Impact:

• This research offers a non-contrast MRI method for visualizing the thoracic duct, potentially reducing patient risks and costs.
• The findings provide specific imaging parameters for improved thoracic duct imaging quality.
• The heavily T(2)-weighted parameter enhances background and surrounding tissue signal control, improving diagnostic accuracy.